Add implementation of Libvirt domain XML documents

27 files changed, 4391 insertions, 0 deletions

diff --git a/src/main/java/org/openslx/libvirt/domain/Domain.java b/src/main/java/org/openslx/libvirt/domain/Domain.java
new file mode 100644
index 0000000..35cd012
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/Domain.java
@@ -0,0 +1,1017 @@
+package org.openslx.libvirt.domain;
+
+import java.io.File;
+import java.io.InputStream;
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+import org.openslx.libvirt.domain.device.Device;
+import org.openslx.libvirt.domain.device.Controller;
+import org.openslx.libvirt.domain.device.ControllerFloppy;
+import org.openslx.libvirt.domain.device.ControllerIde;
+import org.openslx.libvirt.domain.device.ControllerPci;
+import org.openslx.libvirt.domain.device.ControllerSata;
+import org.openslx.libvirt.domain.device.ControllerScsi;
+import org.openslx.libvirt.domain.device.ControllerUsb;
+import org.openslx.libvirt.domain.device.Disk;
+import org.openslx.libvirt.domain.device.DiskCdrom;
+import org.openslx.libvirt.domain.device.DiskFloppy;
+import org.openslx.libvirt.domain.device.DiskStorage;
+import org.openslx.libvirt.domain.device.Graphics;
+import org.openslx.libvirt.domain.device.GraphicsSdl;
+import org.openslx.libvirt.domain.device.GraphicsSpice;
+import org.openslx.libvirt.domain.device.GraphicsVnc;
+import org.openslx.libvirt.domain.device.Hostdev;
+import org.openslx.libvirt.domain.device.Interface;
+import org.openslx.libvirt.domain.device.InterfaceBridge;
+import org.openslx.libvirt.domain.device.InterfaceNetwork;
+import org.openslx.libvirt.domain.device.Sound;
+import org.openslx.libvirt.domain.device.Video;
+import org.openslx.libvirt.xml.LibvirtXmlDocument;
+import org.openslx.libvirt.xml.LibvirtXmlDocumentException;
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+import org.openslx.libvirt.xml.LibvirtXmlSerializationException;
+import org.openslx.libvirt.xml.LibvirtXmlValidationException;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.InputSource;
+
+/**
+ * Implementation of the Libvirt domain XML document.
+ * 
+ * The Libvirt domain XML document is used to describe virtual machines and their configurations.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Domain extends LibvirtXmlDocument
+{
+	/**
+	 * Creates Libvirt domain XML document from {@link String} providing Libvirt domain XML content.
+	 * 
+	 * @param xml {@link String} with Libvirt domain XML content.
+	 * 
+	 * @throws LibvirtXmlDocumentException creation of XML context failed.
+	 * @throws LibvirtXmlSerializationException serialization of the domain XML content failed.
+	 * @throws LibvirtXmlValidationException XML content is not a valid domain XML document.
+	 */
+	public Domain( String xml )
+			throws LibvirtXmlDocumentException, LibvirtXmlSerializationException, LibvirtXmlValidationException
+	{
+		super( xml );
+	}
+
+	/**
+	 * Creates Libvirt domain XML document from {@link File} containing Libvirt domain XML content.
+	 * 
+	 * @param xml existing {@link File} containing Libvirt domain XML content.
+	 * 
+	 * @throws LibvirtXmlDocumentException creation of XML context failed.
+	 * @throws LibvirtXmlSerializationException serialization of the domain XML content failed.
+	 * @throws LibvirtXmlValidationException XML content is not a valid domain XML document.
+	 */
+	public Domain( File xml )
+			throws LibvirtXmlDocumentException, LibvirtXmlSerializationException, LibvirtXmlValidationException
+	{
+		super( xml );
+	}
+
+	/**
+	 * Creates Libvirt domain XML document from {@link InputStream} providing Libvirt domain XML
+	 * content.
+	 * 
+	 * @param xml {@link InputStream} providing Libvirt domain XML content.
+	 * 
+	 * @throws LibvirtXmlDocumentException creation of XML context failed.
+	 * @throws LibvirtXmlSerializationException serialization of the domain XML content failed.
+	 * @throws LibvirtXmlValidationException XML content is not a valid domain XML document.
+	 */
+	public Domain( InputStream xml )
+			throws LibvirtXmlDocumentException, LibvirtXmlSerializationException, LibvirtXmlValidationException
+	{
+		super( xml );
+	}
+
+	/**
+	 * Creates Libvirt domain XML document from {@link InputSource} providing Libvirt domain XML
+	 * content.
+	 * 
+	 * @param xml {@link InputSource} providing Libvirt domain XML content.
+	 * 
+	 * @throws LibvirtXmlDocumentException creation of XML context failed.
+	 * @throws LibvirtXmlSerializationException serialization of the domain XML content failed.
+	 * @throws LibvirtXmlValidationException XML content is not a valid domain XML document.
+	 */
+	public Domain( InputSource xml )
+			throws LibvirtXmlDocumentException, LibvirtXmlSerializationException, LibvirtXmlValidationException
+	{
+		super( xml );
+	}
+
+	/**
+	 * Types of hypervisors specifiable for a virtual machine in the Libvirt domain XML document.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum Type
+	{
+		// @formatter:off
+		QEMU  ( "qemu" ),
+		KQEMU ( "kqemu" ),
+		KVM   ( "kvm" ),
+		XEN   ( "xen" ),
+		LXC   ( "lxc" ),
+		UML   ( "uml" ),
+		OPENVZ( "openvz" ),
+		TEST  ( "test" ),
+		VMWARE( "vmware" ),
+		HYPERV( "hyperv" ),
+		VBOX  ( "vbox" ),
+		PHYP  ( "phyp" ),
+		VZ    ( "vz" ),
+		BHYVE ( "bhyve" );
+		// @formatter:on
+
+		/**
+		 * Name of the hypervisor in a Libvirt domain XML document.
+		 */
+		private String type;
+
+		/**
+		 * Creates a hypervisor type.
+		 * 
+		 * @param type valid name of the hypervisor in a Libvirt domain XML document.
+		 */
+		Type( String type )
+		{
+			this.type = type;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.type;
+		}
+
+		/**
+		 * Creates a hypervisor type from its name with error check.
+		 * 
+		 * @param type name of the hypervisor in the Libvirt domain XML document.
+		 * @return valid hypervisor type.
+		 */
+		public static Type fromString( String type )
+		{
+			for ( Type t : Type.values() ) {
+				if ( t.type.equalsIgnoreCase( type ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+
+	/**
+	 * Returns hypervisor type defined in the Libvirt domain XML document.
+	 * 
+	 * @return hypervisor type.
+	 */
+	public Type getType()
+	{
+		String typeValue = this.getRootXmlNode().getXmlElementAttributeValue( null, "type" );
+		return Type.fromString( typeValue );
+	}
+
+	/**
+	 * Sets hypervisor type in Libvirt domain XML document.
+	 * 
+	 * @param type hypervisor type for Libvirt domain XML document.
+	 */
+	public void setType( Type type )
+	{
+		this.getRootXmlNode().setXmlElementAttributeValue( null, "type", type.toString() );
+	}
+
+	/**
+	 * Returns virtual machine name defined in the Libvirt domain XML document.
+	 * 
+	 * @return name of the virtual machine.
+	 */
+	public String getName()
+	{
+		return this.getRootXmlNode().getXmlElementValue( "name" );
+	}
+
+	/**
+	 * Sets virtual machine name in the Libvirt domain XML document.
+	 * 
+	 * @param name virtual machine name for Libvirt domain XML document.
+	 */
+	public void setName( String name )
+	{
+		this.getRootXmlNode().setXmlElementValue( "name", name );
+	}
+
+	/**
+	 * Returns virtual machine title defined in the Libvirt domain XML document.
+	 * 
+	 * @return title of the virtual machine.
+	 */
+	public String getTitle()
+	{
+		return this.getRootXmlNode().getXmlElementValue( "title" );
+	}
+
+	/**
+	 * Sets virtual machine title in the Libvirt domain XML document.
+	 * 
+	 * @param title virtual machine title for Libvirt domain XML document.
+	 */
+	public void setTitle( String title )
+	{
+		this.getRootXmlNode().setXmlElementValue( "title", title );
+	}
+
+	/**
+	 * Returns virtual machine description defined in the Libvirt domain XML document.
+	 * 
+	 * @return description of virtual machine.
+	 */
+	public String getDescription()
+	{
+		return this.getRootXmlNode().getXmlElementValue( "description" );
+	}
+
+	/**
+	 * Sets virtual machine description in the Libvirt domain XML document.
+	 * 
+	 * @param description virtual machine description for Libvirt domain XML document.
+	 */
+	public void setDescription( String description )
+	{
+		this.getRootXmlNode().setXmlElementValue( "description", description );
+	}
+
+	/**
+	 * Returns virtual machine UUID defined in the Libvirt domain XML document.
+	 * 
+	 * @return UUID of virtual machine.
+	 */
+	public String getUuid()
+	{
+		return this.getRootXmlNode().getXmlElementValue( "uuid" );
+	}
+
+	/**
+	 * Sets virtual machine UUID in the Libvirt domain XML document.
+	 * 
+	 * @param uuid virtual machine UUID for Libvirt domain XML document.
+	 */
+	public void setUuid( String uuid )
+	{
+		this.getRootXmlNode().setXmlElementValue( "uuid", uuid );
+	}
+
+	/**
+	 * Removes virtual machine UUID in the Libvirt domain XML document.
+	 */
+	public void removeUuid()
+	{
+		this.getRootXmlNode().removeXmlElement( "uuid" );
+	}
+
+	/**
+	 * Returns virtual machine memory defined in the Libvirt domain XML document.
+	 * 
+	 * @return memory of virtual machine.
+	 */
+	public BigInteger getMemory()
+	{
+		String memValue = this.getRootXmlNode().getXmlElementValue( "memory" );
+		String memUnit = this.getRootXmlNode().getXmlElementAttributeValue( "memory", "unit" );
+		return DomainUtils.decodeMemory( memValue, memUnit );
+	}
+
+	/**
+	 * Sets virtual machine memory in the Libvirt domain XML document.
+	 * 
+	 * @param memory virtual machine memory in the Libvirt domain XML document.
+	 */
+	public void setMemory( BigInteger memory )
+	{
+		this.getRootXmlNode().setXmlElementAttributeValue( "memory", "unit", "KiB" );
+		this.getRootXmlNode().setXmlElementValue( "memory", DomainUtils.encodeMemory( memory, "KiB" ) );
+	}
+
+	/**
+	 * Returns current virtual machine memory defined in the Libvirt domain XML document.
+	 * 
+	 * @return current memory of virtual machine.
+	 */
+	public BigInteger getCurrentMemory()
+	{
+		String memValue = this.getRootXmlNode().getXmlElementValue( "currentMemory" );
+		String memUnit = this.getRootXmlNode().getXmlElementAttributeValue( "currentMemory", "unit" );
+		return DomainUtils.decodeMemory( memValue, memUnit );
+	}
+
+	/**
+	 * Set current virtual machine memory in the Libvirt domain XML document.
+	 * 
+	 * @param currentMemory current virtual machine memory in the Libvirt domain XML document.
+	 */
+	public void setCurrentMemory( BigInteger currentMemory )
+	{
+		this.getRootXmlNode().setXmlElementAttributeValue( "currentMemory", "unit", "KiB" );
+		this.getRootXmlNode().setXmlElementValue( "currentMemory", DomainUtils.encodeMemory( currentMemory, "KiB" ) );
+	}
+
+	/**
+	 * Returns number of virtual machine CPUs defined in the Libvirt domain XML document.
+	 * 
+	 * @return number of CPUs of the virtual machine.
+	 */
+	public int getVCpu()
+	{
+		String number = this.getRootXmlNode().getXmlElementValue( "vcpu" );
+		return Integer.parseUnsignedInt( number );
+	}
+
+	/**
+	 * Set number of virtual machine CPUs in the Libvirt domain XML document.
+	 * 
+	 * @param number virtual machine CPUs.
+	 */
+	public void setVCpu( int number )
+	{
+		this.getRootXmlNode().setXmlElementValue( "vcpu", Integer.toString( number ) );
+	}
+
+	/**
+	 * Returns virtual machine CPU model defined in the Libvirt domain XML document.
+	 * 
+	 * @return CPU model of virtual machine.
+	 */
+	public String getCpuModel()
+	{
+		return this.getRootXmlNode().getXmlElementValue( "cpu/model" );
+	}
+
+	/**
+	 * Sets virtual machine CPU model in the Libvirt domain XML document.
+	 * 
+	 * @param model virtual machine CPU model.
+	 */
+	public void setCpuModel( String model )
+	{
+		this.getRootXmlNode().setXmlElementValue( "cpu/model", model );
+	}
+
+	/**
+	 * CPU modes specifiable for a virtual machine in the Libvirt domain XML document.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum CpuMode
+	{
+		// @formatter:off
+		CUSTOM          ( "custom" ),
+		HOST_MODEL      ( "host-model" ),
+		HOST_PASSTHROUGH( "host-passthrough" );
+		// @formatter:on
+
+		/**
+		 * Name of the CPU mode in a Libvirt domain XML document.
+		 */
+		private String cpuMode;
+
+		/**
+		 * Creates a CPU mode.
+		 * 
+		 * @param mode valid name of the CPU mode in the Libvirt domain XML document.
+		 */
+		CpuMode( String mode )
+		{
+			this.cpuMode = mode;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.cpuMode;
+		}
+
+		/**
+		 * Creates a CPU mode from its name with error check.
+		 * 
+		 * @param mode name of the CPU mode in the Libvirt domain XML document.
+		 * @return valid CPU mode.
+		 */
+		public static CpuMode fromString( String mode )
+		{
+			for ( CpuMode t : CpuMode.values() ) {
+				if ( t.cpuMode.equalsIgnoreCase( mode ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+
+	/**
+	 * Returns virtual machine CPU mode defined in the Libvirt domain XML document.
+	 * 
+	 * @return CPU mode of the virtual machine.
+	 */
+	public CpuMode getCpuMode()
+	{
+		String cpuMode = this.getRootXmlNode().getXmlElementAttributeValue( "cpu", "mode" );
+		return CpuMode.fromString( cpuMode );
+	}
+
+	/**
+	 * Sets virtual machine CPU mode in the Libvirt domain XML document.
+	 * 
+	 * @param mode virtual machine CPU mode.
+	 */
+	public void setCpuMode( CpuMode mode )
+	{
+		this.getRootXmlNode().setXmlElementAttributeValue( "cpu", "mode", mode.toString() );
+	}
+
+	/**
+	 * CPU checks specifiable for a virtual machine in the Libvirt domain XML document.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum CpuCheck
+	{
+		// @formatter:off
+		NONE   ( "none" ),
+		PARTIAL( "partial" ),
+		FULL   ( "full" );
+		// @formatter:on
+
+		/**
+		 * Name of the CPU check in the Libvirt domain XML document.
+		 */
+		private String cpuCheck;
+
+		/**
+		 * Creates a CPU check.
+		 * 
+		 * @param check valid name of the CPU check in the Libvirt domain XML document.
+		 */
+		CpuCheck( String check )
+		{
+			this.cpuCheck = check;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.cpuCheck;
+		}
+
+		/**
+		 * Creates a CPU check from its name with error check.
+		 * 
+		 * @param mode name of the CPU check in the Libvirt domain XML document.
+		 * @return valid CPU check.
+		 */
+		public static CpuCheck fromString( String check )
+		{
+			for ( CpuCheck t : CpuCheck.values() ) {
+				if ( t.cpuCheck.equalsIgnoreCase( check ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+
+	/**
+	 * Returns virtual machine CPU check defined in the Libvirt domain XML document.
+	 * 
+	 * @return CPU check of the virtual machine.
+	 */
+	public CpuCheck getCpuCheck()
+	{
+		String cpuCheck = this.getRootXmlNode().getXmlElementAttributeValue( "cpu", "check" );
+		return CpuCheck.fromString( cpuCheck );
+	}
+
+	/**
+	 * Sets virtual machine CPU check in the Libvirt domain XML document.
+	 * 
+	 * @param check virtual machine CPU check.
+	 */
+	public void setCpuCheck( CpuCheck check )
+	{
+		this.getRootXmlNode().setXmlElementAttributeValue( "cpu", "check", check.toString() );
+	}
+
+	/**
+	 * Returns virtual machine devices defined in the Libvirt domain XML document.
+	 * 
+	 * @return devices of the virtual machine.
+	 */
+	public ArrayList<Device> getDevices()
+	{
+		ArrayList<Device> devices = new ArrayList<Device>();
+		Node devicesNode = this.getRootXmlNode().getXmlElement( "devices" );
+
+		if ( devicesNode != null ) {
+
+			NodeList devicesElements = devicesNode.getChildNodes();
+
+			for ( int i = 0; i < devicesElements.getLength(); i++ ) {
+				LibvirtXmlNode deviceNode = null;
+				deviceNode = new LibvirtXmlNode( this.getRootXmlNode().getXmlDocument(), devicesElements.item( i ) );
+				Device device = Device.newInstance( deviceNode );
+
+				if ( device != null ) {
+					devices.add( device );
+				}
+			}
+		}
+
+		return devices;
+	}
+
+	/**
+	 * Filter list of virtual machine devices of type {@link Device} and cast filtered instances to
+	 * more specific device type <code>R</code>.
+	 * 
+	 * @param <R> specific device type for filtering and casting.
+	 * @param cls specific device type's class.
+	 * @param devices list of virtual machines devices.
+	 * @return filtered list of virtual machines devices of type <code>R</code>.
+	 */
+	private static <R> ArrayList<R> filterDevices( Class<R> cls, ArrayList<Device> devices )
+	{
+		Predicate<Device> byFilter = device -> cls.isInstance( device );
+		Function<Device, R> castFunction = device -> cls.cast( device );
+
+		return devices.stream().filter( byFilter ).map( castFunction )
+				.collect( Collectors.toCollection( ArrayList::new ) );
+	}
+
+	/**
+	 * Returns list of virtual machine controller devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine controller devices.
+	 */
+	public ArrayList<Controller> getControllerDevices()
+	{
+		return Domain.filterDevices( Controller.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine floppy controller devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine floppy controller devices.
+	 */
+	public ArrayList<ControllerFloppy> getFloppyControllerDevices()
+	{
+		return Domain.filterDevices( ControllerFloppy.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine IDE controller devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine IDE controller devices.
+	 */
+	public ArrayList<ControllerIde> getIdeControllerDevices()
+	{
+		return Domain.filterDevices( ControllerIde.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine floppy controller devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine floppy controller devices.
+	 */
+	public ArrayList<ControllerPci> getPciControllerDevices()
+	{
+		return Domain.filterDevices( ControllerPci.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine SATA controller devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine SATA controller devices.
+	 */
+	public ArrayList<ControllerSata> getSataControllerDevices()
+	{
+		return Domain.filterDevices( ControllerSata.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine SCSI controller devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine SCSI controller devices.
+	 */
+	public ArrayList<ControllerScsi> getScsiControllerDevices()
+	{
+		return Domain.filterDevices( ControllerScsi.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine USB controller devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine USB controller devices.
+	 */
+	public ArrayList<ControllerUsb> getUsbControllerDevices()
+	{
+		return Domain.filterDevices( ControllerUsb.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine disk devices specified in the Libvirt domain XML document.
+	 * 
+	 * @return list of virtual machine disk devices.
+	 */
+	public ArrayList<Disk> getDiskDevices()
+	{
+		return Domain.filterDevices( Disk.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine disk CDROM devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine disk CDROM devices.
+	 */
+	public ArrayList<DiskCdrom> getDiskCdromDevices()
+	{
+		return Domain.filterDevices( DiskCdrom.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine disk floppy devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine disk floppy devices.
+	 */
+	public ArrayList<DiskFloppy> getDiskFloppyDevices()
+	{
+		return Domain.filterDevices( DiskFloppy.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine disk storage devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine disk storage devices.
+	 */
+	public ArrayList<DiskStorage> getDiskStorageDevices()
+	{
+		return Domain.filterDevices( DiskStorage.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine hostdev devices specified in the Libvirt domain XML document.
+	 * 
+	 * @return list of virtual machine hostdev devices.
+	 */
+	public ArrayList<Hostdev> getHostdevDevices()
+	{
+		return Domain.filterDevices( Hostdev.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine network interface devices specified in the Libvirt domain XML
+	 * document.
+	 * 
+	 * @return list of virtual machine network interface devices.
+	 */
+	public ArrayList<Interface> getInterfaceDevices()
+	{
+		return Domain.filterDevices( Interface.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine graphic devices specified in the Libvirt domain XML document.
+	 * 
+	 * @return list of virtual machine graphic devices.
+	 */
+	public ArrayList<Graphics> getGraphicDevices()
+	{
+		return Domain.filterDevices( Graphics.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine sound devices specified in the Libvirt domain XML document.
+	 * 
+	 * @return list of virtual machine sound devices.
+	 */
+	public ArrayList<Sound> getSoundDevices()
+	{
+		return Domain.filterDevices( Sound.class, this.getDevices() );
+	}
+
+	/**
+	 * Returns list of virtual machine video devices specified in the Libvirt domain XML document.
+	 * 
+	 * @return list of virtual machine video devices.
+	 */
+	public ArrayList<Video> getVideoDevices()
+	{
+		return Domain.filterDevices( Video.class, this.getDevices() );
+	}
+
+	/**
+	 * Adds a virtual machine device to the Libvirt domain XML document.
+	 *
+	 * @param device virtual machine device that is added to the Libvirt domain XML document.
+	 * @return reference to the added device for configuration purposes if creation was successful.
+	 */
+	public Device addDevice( Device device )
+	{
+		Device addedDevice = null;
+
+		if ( device != null ) {
+			Node devicesNode = this.getRootXmlNode().getXmlElement( "devices" );
+
+			if ( devicesNode != null ) {
+				LibvirtXmlNode parentDevicesNode = null;
+				parentDevicesNode = new LibvirtXmlNode( this.getRootXmlNode().getXmlDocument(), devicesNode );
+				addedDevice = Device.createInstance( device, parentDevicesNode );
+			}
+		}
+
+		return addedDevice;
+	}
+
+	/**
+	 * Adds a virtual machine controller device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added controller device if creation was successful.
+	 */
+	public Controller addControllerDevice()
+	{
+		return Controller.class.cast( this.addDevice( new Controller() ) );
+	}
+
+	/**
+	 * Adds a virtual machine floppy controller device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added floppy controller device if creation was successful.
+	 */
+	public ControllerFloppy addControllerFloppyDevice()
+	{
+		return ControllerFloppy.class.cast( this.addDevice( new ControllerFloppy() ) );
+	}
+
+	/**
+	 * Adds a virtual machine IDE controller device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added IDE controller device if creation was successful.
+	 */
+	public ControllerIde addControllerIdeDevice()
+	{
+		return ControllerIde.class.cast( this.addDevice( new ControllerIde() ) );
+	}
+
+	/**
+	 * Adds a virtual machine PCI controller device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added PCI controller device if creation was successful.
+	 */
+	public ControllerPci addControllerPciDevice()
+	{
+		return ControllerPci.class.cast( this.addDevice( new ControllerPci() ) );
+	}
+
+	/**
+	 * Adds a virtual machine SATA controller device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added SATA controller device if creation was successful.
+	 */
+	public ControllerSata addControllerSataDevice()
+	{
+		return ControllerSata.class.cast( this.addDevice( new ControllerSata() ) );
+	}
+
+	/**
+	 * Adds a virtual machine SCSI controller device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added SCSI controller device if creation was successful.
+	 */
+	public ControllerScsi addControllerScsiDevice()
+	{
+		return ControllerScsi.class.cast( this.addDevice( new ControllerScsi() ) );
+	}
+
+	/**
+	 * Adds a virtual machine USB controller device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added USB controller device if creation was successful.
+	 */
+	public ControllerUsb addControllerUsbDevice()
+	{
+		return ControllerUsb.class.cast( this.addDevice( new ControllerUsb() ) );
+	}
+
+	/**
+	 * Adds a virtual machine disk device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added disk device if creation was successful.
+	 */
+	public Disk addDiskDevice()
+	{
+		return Disk.class.cast( this.addDevice( new Disk() ) );
+	}
+
+	/**
+	 * Adds a virtual machine CDROM disk device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added CDROM disk device if creation was successful.
+	 */
+	public DiskCdrom addDiskCdromDevice()
+	{
+		return DiskCdrom.class.cast( this.addDevice( new DiskCdrom() ) );
+	}
+
+	/**
+	 * Adds a virtual machine floppy disk device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added floppy disk device if creation was successful.
+	 */
+	public DiskFloppy addDiskFloppyDevice()
+	{
+		return DiskFloppy.class.cast( this.addDevice( new DiskFloppy() ) );
+	}
+
+	/**
+	 * Adds a virtual machine storage disk device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added storage disk device if creation was successful.
+	 */
+	public DiskStorage addDiskStorageDevice()
+	{
+		return DiskStorage.class.cast( this.addDevice( new DiskStorage() ) );
+	}
+
+	/**
+	 * Adds a virtual machine disk device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added disk device if creation was successful.
+	 */
+	public Hostdev addHostdevDevice()
+	{
+		return Hostdev.class.cast( this.addDevice( new Hostdev() ) );
+	}
+
+	/**
+	 * Adds a virtual machine network device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added network device if creation was successful.
+	 */
+	public Interface addInterfaceDevice()
+	{
+		return Interface.class.cast( this.addDevice( new Interface() ) );
+	}
+
+	/**
+	 * Adds a virtual machine network bridge interface device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added network interface device if creation was successful.
+	 */
+	public InterfaceBridge addInterfaceBridgeDevice()
+	{
+		return InterfaceBridge.class.cast( this.addDevice( new InterfaceBridge() ) );
+	}
+
+	/**
+	 * Adds a virtual machine network interface device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added network interface device if creation was successful.
+	 */
+	public InterfaceNetwork addInterfaceNetworkDevice()
+	{
+		return InterfaceNetwork.class.cast( this.addDevice( new InterfaceNetwork() ) );
+	}
+
+	/**
+	 * Adds a virtual machine graphics device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added graphics device if creation was successful.
+	 */
+	public Graphics addGraphicsDevice()
+	{
+		return Graphics.class.cast( this.addDevice( new Graphics() ) );
+	}
+
+	/**
+	 * Adds a virtual machine SDL graphics device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added SDL graphics device if creation was successful.
+	 */
+	public GraphicsSdl addGraphicsSdlDevice()
+	{
+		return GraphicsSdl.class.cast( this.addDevice( new GraphicsSdl() ) );
+	}
+
+	/**
+	 * Adds a virtual machine SPICE graphics device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added SPICE graphics device if creation was successful.
+	 */
+	public GraphicsSpice addGraphicsSpiceDevice()
+	{
+		return GraphicsSpice.class.cast( this.addDevice( new GraphicsSpice() ) );
+	}
+
+	/**
+	 * Adds a virtual machine VNC graphics device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added VNC graphics device if creation was successful.
+	 */
+	public GraphicsVnc addGraphicsVncDevice()
+	{
+		return GraphicsVnc.class.cast( this.addDevice( new GraphicsVnc() ) );
+	}
+
+	/**
+	 * Adds a virtual machine sound device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added sound device if creation was successful.
+	 */
+	public Sound addSoundDevice()
+	{
+		return Sound.class.cast( this.addDevice( new Sound() ) );
+	}
+
+	/**
+	 * Adds a virtual machine video device to the Libvirt domain XML document.
+	 *
+	 * @return reference to the added video device if creation was successful.
+	 */
+	public Video addVideoDevice()
+	{
+		return Video.class.cast( this.addDevice( new Video() ) );
+	}
+
+	/**
+	 * Removes boot oder entries in the Libvirt domain XML document.
+	 */
+	public void removeBootOrder()
+	{
+		// remove boot order entries of all disk devices
+		for ( Disk diskDevice : this.getDiskDevices() ) {
+			diskDevice.removeBootOrder();
+		}
+
+		// remove boot order entries of all network interface devices
+		for ( Interface interfaceDevice : this.getInterfaceDevices() ) {
+			interfaceDevice.removeBootOrder();
+		}
+
+		// remove boot order entries of all hostdev devices
+		for ( Hostdev hostdevDevice : this.getHostdevDevices() ) {
+			hostdevDevice.removeBootOrder();
+		}
+
+		// remove boot oder entries under the 'os' element
+		this.getRootXmlNode().removeXmlElement( "os/boot" );
+	}
+
+	/**
+	 * Removes underlying source for all disk devices in the Libvirt domain XML document.
+	 * 
+	 * @implNote Calling this method will result in an invalid Libvirt domain XML document.
+	 */
+	public void removeDiskDevicesStorage()
+	{
+		for ( Disk diskDevice : this.getDiskDevices() ) {
+			diskDevice.removeStorage();
+		}
+	}
+
+	/**
+	 * Removes network source for all interface devices in the Libvirt domain XML document.
+	 */
+	public void removeInterfaceDevicesSource()
+	{
+		for ( Interface interfaceDevice : this.getInterfaceDevices() ) {
+			interfaceDevice.removeSource();
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/DomainUtils.java b/src/main/java/org/openslx/libvirt/domain/DomainUtils.java
new file mode 100644
index 0000000..2462371
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/DomainUtils.java
@@ -0,0 +1,118 @@
+package org.openslx.libvirt.domain;
+
+import java.math.BigInteger;
+
+/**
+ * Collection of helper functions to maintain a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public final class DomainUtils
+{
+
+	/**
+	 * Converts memory value with specified SI unit to absolute value in bytes.
+	 * 
+	 * @param value amount of memory in specified SI unit.
+	 * @param unit SI unit name, one of: bytes, KB, k, KiB, MB, M, MiB, GB, G, GiB, TB, T, TiB, for
+	 *           <code>value</code>.
+	 * @return absolute amount of memory in bytes.
+	 */
+	public static BigInteger decodeMemory( String value, String unit )
+	{
+		BigInteger factor = null;
+		BigInteger result = new BigInteger( value );
+
+		switch ( unit ) {
+		case "b":
+		case "bytes":
+			factor = new BigInteger( "1" );
+			break;
+		case "KB":
+			factor = new BigInteger( "1000" );
+			break;
+		case "k":
+		case "KiB":
+			factor = new BigInteger( "1024" );
+			break;
+		case "MB":
+			factor = new BigInteger( "1000000" );
+			break;
+		case "M":
+		case "MiB":
+			factor = new BigInteger( "1048576" );
+			break;
+		case "GB":
+			factor = new BigInteger( "1000000000" );
+			break;
+		case "G":
+		case "GiB":
+			factor = new BigInteger( "1073741824" );
+			break;
+		case "TB":
+			factor = new BigInteger( "1000000000000" );
+			break;
+		case "T":
+		case "TiB":
+			factor = new BigInteger( "1099511627776" );
+			break;
+		default:
+			return null;
+		}
+
+		return result.multiply( factor );
+	}
+
+	/**
+	 * Convert memory from absolute value in bytes to value in specified SI unit.
+	 * 
+	 * @param value absolute amount of memory in bytes.
+	 * @param unit SI unit name, one of: bytes, KB, k, KiB, MB, M, MiB, GB, G, GiB, TB, T, TiB for
+	 *           returned memory value.
+	 * @return amount of memory in specified SI unit.
+	 */
+	public static String encodeMemory( BigInteger value, String unit )
+	{
+		BigInteger dividend = null;
+
+		switch ( unit ) {
+		case "b":
+		case "bytes":
+			dividend = new BigInteger( "1" );
+			break;
+		case "KB":
+			dividend = new BigInteger( "1000" );
+			break;
+		case "k":
+		case "KiB":
+			dividend = new BigInteger( "1024" );
+			break;
+		case "MB":
+			dividend = new BigInteger( "1000000" );
+			break;
+		case "M":
+		case "MiB":
+			dividend = new BigInteger( "1048576" );
+			break;
+		case "GB":
+			dividend = new BigInteger( "1000000000" );
+			break;
+		case "G":
+		case "GiB":
+			dividend = new BigInteger( "1073741824" );
+			break;
+		case "TB":
+			dividend = new BigInteger( "1000000000000" );
+			break;
+		case "T":
+		case "TiB":
+			dividend = new BigInteger( "1099511627776" );
+			break;
+		default:
+			return null;
+		}
+
+		return value.divide( dividend ).toString();
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/Controller.java b/src/main/java/org/openslx/libvirt/domain/device/Controller.java
new file mode 100644
index 0000000..626462b
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/Controller.java
@@ -0,0 +1,181 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A controller (PCI, USB, ...) device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Controller extends Device
+{
+	/**
+	 * Creates an empty controller device.
+	 */
+	public Controller()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a controller device representing an existing Libvirt XML controller device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML controller device element.
+	 */
+	public Controller( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns index of the controller.
+	 * 
+	 * @return index of the controller.
+	 */
+	public int getIndex()
+	{
+		String index = this.getXmlElementAttributeValue( "index" );
+		return Integer.parseInt( index );
+	}
+
+	/**
+	 * Sets index for the controller.
+	 * 
+	 * @param index index for the controller.
+	 */
+	public void setIndex( int index )
+	{
+		this.setXmlElementAttributeValue( "index", Integer.toString( index ) );
+	}
+
+	/**
+	 * Creates a non-existent controller device as Libvirt XML device element.
+	 * 
+	 * @param controller controller device that is created.
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created controller device instance.
+	 */
+	public static Controller createInstance( Controller controller, LibvirtXmlNode xmlNode )
+	{
+		Controller addedController = null;
+
+		if ( controller instanceof ControllerFloppy ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.FLOPPY.toString() );
+			addedController = ControllerFloppy.createInstance( xmlNode );
+		} else if ( controller instanceof ControllerIde ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.IDE.toString() );
+			addedController = ControllerIde.createInstance( xmlNode );
+		} else if ( controller instanceof ControllerPci ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.PCI.toString() );
+			addedController = ControllerPci.createInstance( xmlNode );
+		} else if ( controller instanceof ControllerSata ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.SATA.toString() );
+			addedController = ControllerSata.createInstance( xmlNode );
+		} else if ( controller instanceof ControllerScsi ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.SCSI.toString() );
+			addedController = ControllerScsi.createInstance( xmlNode );
+		} else if ( controller instanceof ControllerUsb ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.USB.toString() );
+			addedController = ControllerUsb.createInstance( xmlNode );
+		}
+
+		return addedController;
+	}
+
+	/**
+	 * Creates a controller device representing an existing Libvirt XML controller device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML controller device element.
+	 * @return controller device instance.
+	 */
+	public static Controller newInstance( LibvirtXmlNode xmlNode )
+	{
+
+		Controller deviceController = null;
+		Type type = Type.fromString( xmlNode.getXmlElementAttributeValue( "type" ) );
+
+		if ( type == null ) {
+			return null;
+		}
+
+		switch ( type ) {
+		case FLOPPY:
+			deviceController = ControllerFloppy.newInstance( xmlNode );
+			break;
+		case IDE:
+			deviceController = ControllerIde.newInstance( xmlNode );
+			break;
+		case PCI:
+			deviceController = ControllerPci.newInstance( xmlNode );
+			break;
+		case SATA:
+			deviceController = ControllerSata.newInstance( xmlNode );
+			break;
+		case SCSI:
+			deviceController = ControllerScsi.newInstance( xmlNode );
+			break;
+		case USB:
+			deviceController = ControllerUsb.newInstance( xmlNode );
+			break;
+		}
+
+		return deviceController;
+	}
+
+	/**
+	 * Type of controller device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	enum Type
+	{
+		// @formatter:off
+		FLOPPY( "fdc" ),
+		IDE   ( "ide" ),
+		PCI   ( "pci" ),
+		SATA  ( "sata" ),
+		SCSI  ( "scsi" ),
+		USB   ( "usb" );
+		// @formatter:on
+
+		/**
+		 * Name of the controller device type.
+		 */
+		private String type = null;
+
+		/**
+		 * Creates controller device type.
+		 * 
+		 * @param type valid name of the controller device type in a Libvirt domain XML document.
+		 */
+		Type( String type )
+		{
+			this.type = type;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.type;
+		}
+
+		/**
+		 * Creates controller device type from its name with error check.
+		 * 
+		 * @param type name of the controller device type in a Libvirt domain XML document.
+		 * @return valid controller device type.
+		 */
+		public static Type fromString( String type )
+		{
+			for ( Type t : Type.values() ) {
+				if ( t.type.equalsIgnoreCase( type ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/ControllerFloppy.java b/src/main/java/org/openslx/libvirt/domain/device/ControllerFloppy.java
new file mode 100644
index 0000000..5e580bd
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/ControllerFloppy.java
@@ -0,0 +1,54 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A floppy controller device in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class ControllerFloppy extends Controller
+{
+	/**
+	 * Creates an empty floppy controller device.
+	 */
+	public ControllerFloppy()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a floppy controller device representing an existing Libvirt XML floppy controller
+	 * device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML controller device element.
+	 */
+	public ControllerFloppy( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent floppy controller device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created floppy controller device instance.
+	 */
+	public static ControllerFloppy createInstance( LibvirtXmlNode xmlNode )
+	{
+		return ControllerFloppy.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a floppy controller device representing an existing Libvirt XML floppy controller
+	 * device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML controller device element.
+	 * @return floppy controller device instance.
+	 */
+	public static ControllerFloppy newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new ControllerFloppy( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/ControllerIde.java b/src/main/java/org/openslx/libvirt/domain/device/ControllerIde.java
new file mode 100644
index 0000000..062b67d
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/ControllerIde.java
@@ -0,0 +1,128 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * An IDE controller device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class ControllerIde extends Controller
+{
+	/**
+	 * Creates an empty IDE controller device.
+	 */
+	public ControllerIde()
+	{
+		super();
+	}
+
+	/**
+	 * Creates an IDE controller device representing an existing Libvirt XML IDE controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML IDE controller device element.
+	 */
+	public ControllerIde( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns emulated hardware model of the IDE controller.
+	 * 
+	 * @return hardware model of the IDE controller.
+	 */
+	public Model getModel()
+	{
+		String model = this.getXmlElementAttributeValue( "model" );
+		return Model.fromString( model );
+	}
+
+	/**
+	 * Sets hardware model for the IDE controller.
+	 * 
+	 * @param model hardware model for the IDE controller.
+	 */
+	public void setModel( Model model )
+	{
+		this.setXmlElementAttributeValue( "model", model.toString() );
+	}
+
+	/**
+	 * Creates a non-existent IDE controller device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created IDE controller device instance.
+	 */
+	public static ControllerIde createInstance( LibvirtXmlNode xmlNode )
+	{
+		return ControllerIde.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates an IDE controller device representing an existing Libvirt XML IDE controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML IDE controller device element.
+	 * @return IDE controller device instance.
+	 */
+	public static ControllerIde newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new ControllerIde( xmlNode );
+	}
+
+	/**
+	 * Model of IDE controller device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	enum Model
+	{
+		// @formatter:off
+		PIIX3( "piix3" ),
+		PIIX4( "pixx4" ),
+		ICH6 ( "ich6" );
+		// @formatter:on
+
+		/**
+		 * Name of the IDE controller device model.
+		 */
+		private String model = null;
+
+		/**
+		 * Creates IDE controller device model.
+		 * 
+		 * @param type valid name of the IDE controller device model in a Libvirt domain XML document.
+		 */
+		Model( String model )
+		{
+			this.model = model;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.model;
+		}
+
+		/**
+		 * Creates IDE controller device model from its name with error check.
+		 * 
+		 * @param type name of the IDE controller device model in a Libvirt domain XML document.
+		 * @return valid IDE controller device model.
+		 */
+		public static Model fromString( String model )
+		{
+			for ( Model t : Model.values() ) {
+				if ( t.model.equalsIgnoreCase( model ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/ControllerPci.java b/src/main/java/org/openslx/libvirt/domain/device/ControllerPci.java
new file mode 100644
index 0000000..feb8b1a
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/ControllerPci.java
@@ -0,0 +1,145 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A PCI controller device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class ControllerPci extends Controller
+{
+	/**
+	 * Creates an empty PCI controller device.
+	 */
+	public ControllerPci()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a PCI controller device representing an existing Libvirt XML PCI controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML PCI controller device element.
+	 */
+	public ControllerPci( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns model of the PCI controller.
+	 * 
+	 * @return model of the PCI controller.
+	 */
+	public Model getModel()
+	{
+		String model = this.getXmlElementAttributeValue( "model" );
+		return Model.fromString( model );
+	}
+
+	/**
+	 * Sets model for the PCI controller.
+	 * 
+	 * @param model model for the PCI controller.
+	 */
+	public void setModel( Model model )
+	{
+		this.setXmlElementAttributeValue( "model", model.toString() );
+	}
+
+	/**
+	 * Returns emulated hardware model of the PCI controller.
+	 * 
+	 * @return emulated hardware model of the PCI controller.
+	 */
+	public String getModelEmulated()
+	{
+		return this.getXmlElementAttributeValue( "model", "name" );
+	}
+
+	/**
+	 * Creates a non-existent PCI controller device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created PCI controller device instance.
+	 */
+	public static ControllerPci createInstance( LibvirtXmlNode xmlNode )
+	{
+		return ControllerPci.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a PCI controller device representing an existing Libvirt XML PCI controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML PCI controller device element.
+	 * @return PCI controller device instance.
+	 */
+	public static ControllerPci newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new ControllerPci( xmlNode );
+	}
+
+	/**
+	 * Model of PCI controller device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	enum Model
+	{
+		// @formatter:off
+		PCI_ROOT                   ( "pci-root" ),
+		PCI_BRDIGE                 ( "pci-bridge" ),
+		PCIE_ROOT                  ( "pcie-root" ),
+		PCI_DMI2BRIDGE             ( "dmi-to-pci-bridge" ),
+		PCIE_ROOT_PORT             ( "pcie-root-port" ),
+		PCIE_SWITCH_UPSTREAM_PORT  ( "pcie-switch-upstream-port" ),
+		PCIE_SWITCH_DOWNSTREAM_PORT( "pcie-switch-downstream-port" ),
+		PCI_EXPANDER_BUS           ( "pci-expander-bus" ),
+		PCIE_EXPANDER_BUS          ( "pcie-expander-bus" ),
+		PCIE2PCI_BRIDGE            ( "pcie-to-pci-bridge" );
+		// @formatter:on
+
+		/**
+		 * Name of the PCI controller device model.
+		 */
+		private String model = null;
+
+		/**
+		 * Creates PCI controller device model.
+		 * 
+		 * @param type valid name of the PCI controller device model in a Libvirt domain XML document.
+		 */
+		Model( String model )
+		{
+			this.model = model;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.model;
+		}
+
+		/**
+		 * Creates PCI controller device model from its name with error check.
+		 * 
+		 * @param type name of the PCI controller device model in a Libvirt domain XML document.
+		 * @return valid PCI controller device model.
+		 */
+		public static Model fromString( String model )
+		{
+			for ( Model t : Model.values() ) {
+				if ( t.model.equalsIgnoreCase( model ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/ControllerSata.java b/src/main/java/org/openslx/libvirt/domain/device/ControllerSata.java
new file mode 100644
index 0000000..b784ae0
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/ControllerSata.java
@@ -0,0 +1,54 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A SATA controller device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class ControllerSata extends Controller
+{
+	/**
+	 * Creates an empty SATA controller device.
+	 */
+	public ControllerSata()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a SATA controller device representing an existing Libvirt XML SATA controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML SATA controller device element.
+	 */
+	public ControllerSata( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent SATA controller device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created SATA controller device instance.
+	 */
+	public static ControllerSata createInstance( LibvirtXmlNode xmlNode )
+	{
+		return ControllerSata.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a SATA controller device representing an existing Libvirt XML SATA controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML SATA controller device element.
+	 * @return SATA controller device instance.
+	 */
+	public static ControllerSata newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new ControllerSata( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/ControllerScsi.java b/src/main/java/org/openslx/libvirt/domain/device/ControllerScsi.java
new file mode 100644
index 0000000..16c3a0f
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/ControllerScsi.java
@@ -0,0 +1,138 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A SCSI controller device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class ControllerScsi extends Controller
+{
+	/**
+	 * Creates an empty SCSI controller device.
+	 */
+	public ControllerScsi()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a SCSI controller device representing an existing Libvirt XML SCSI controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML SCSI controller device element.
+	 */
+	public ControllerScsi( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns hardware model of the PCI controller.
+	 * 
+	 * @return hardware model of the PCI controller.
+	 */
+	public Model getModel()
+	{
+		String model = this.getXmlElementAttributeValue( "model" );
+		return Model.fromString( model );
+	}
+
+	/**
+	 * Sets hardware model for the PCI controller.
+	 * 
+	 * @param model hardware model for the PCI controller.
+	 */
+	public void setModel( Model model )
+	{
+		this.setXmlElementAttributeValue( "model", model.toString() );
+	}
+
+	/**
+	 * Creates a non-existent SCSI controller device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created SCSI controller device instance.
+	 */
+	public static ControllerScsi createInstance( LibvirtXmlNode xmlNode )
+	{
+		return ControllerScsi.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a SCSI controller device representing an existing Libvirt XML SCSI controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML SCSI controller device element.
+	 * @return SCSI controller device instance.
+	 */
+	public static ControllerScsi newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new ControllerScsi( xmlNode );
+	}
+
+	/**
+	 * Model of SCSI controller device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	enum Model
+	{
+		// @formatter:off
+		AUTO                   ( "auto" ),
+		BUSLOGIC               ( "buslogic" ),
+		IBMVSCSI               ( "ibmvscsi" ),
+		LSISAS1068             ( "lsisas1068" ),
+		LSISAS1078             ( "lsisas1078" ),
+		VIRTIO_SCSI            ( "virtio-scsi" ),
+		VMPVSCSI               ( "vmpvscsi" ),
+		VIRTIO_TRANSITIONAL    ( "virtio-transitional" ),
+		VIRTIO_NON_TRANSITIONAL( "virtio-non-transitional" ),
+		NCR53C90               ( "ncr53c90" ),
+		AM53C974               ( "am53c974" ),
+		DC390                  ( "dc390" );
+		// @formatter:on
+
+		/**
+		 * Name of the SCSI controller device model.
+		 */
+		private String model = null;
+
+		/**
+		 * Creates SCSI controller device model.
+		 * 
+		 * @param type valid name of the SCSI controller device model in a Libvirt domain XML
+		 *           document.
+		 */
+		Model( String model )
+		{
+			this.model = model;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.model;
+		}
+
+		/**
+		 * Creates SCSI controller device model from its name with error check.
+		 * 
+		 * @param type name of the SCSI controller device model in a Libvirt domain XML document.
+		 * @return valid SCSI controller device model.
+		 */
+		public static Model fromString( String model )
+		{
+			for ( Model t : Model.values() ) {
+				if ( t.model.equalsIgnoreCase( model ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/ControllerUsb.java b/src/main/java/org/openslx/libvirt/domain/device/ControllerUsb.java
new file mode 100644
index 0000000..695167c
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/ControllerUsb.java
@@ -0,0 +1,139 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A USB controller device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class ControllerUsb extends Controller
+{
+	/**
+	 * Creates an empty USB controller device.
+	 */
+	public ControllerUsb()
+	{
+		super();
+	}
+
+	/**
+	 * Creates an USB controller device representing an existing Libvirt XML USB controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML USB controller device element.
+	 */
+	public ControllerUsb( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns hardware model of the PCI controller.
+	 * 
+	 * @return hardware model of the PCI controller.
+	 */
+	public Model getModel()
+	{
+		String model = this.getXmlElementAttributeValue( "model" );
+		return Model.fromString( model );
+	}
+
+	/**
+	 * Sets hardware model for the PCI controller.
+	 * 
+	 * @param model hardware model for the PCI controller.
+	 */
+	public void setModel( Model model )
+	{
+		this.setXmlElementAttributeValue( "model", model.toString() );
+	}
+
+	/**
+	 * Creates a non-existent USB controller device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created USB controller device instance.
+	 */
+	public static ControllerUsb createInstance( LibvirtXmlNode xmlNode )
+	{
+		return ControllerUsb.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates an USB controller device representing an existing Libvirt XML USB controller device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML USB controller device element.
+	 * @return USB controller device instance.
+	 */
+	public static ControllerUsb newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new ControllerUsb( xmlNode );
+	}
+
+	/**
+	 * Model of PCI controller device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum Model
+	{
+		// @formatter:off
+		NONE          ( "none" ),
+		PIIX3_UHCI    ( "piix3-uhci" ),
+		PIIX4_UHCI    ( "piix4-uhci" ),
+		EHCI          ( "ehci" ),
+		ICH9_EHCI1    ( "ich9-ehci1" ),
+		ICH9_UHCI1    ( "ich9-uhci1" ),
+		ICH9_UHCI2    ( "ich9-uhci2" ),
+		ICH9_UHCI3    ( "ich9-uhci3" ),
+		VT82C686B_UHCI( "vt82c686b-uhci" ),
+		PCI_OHCI      ( "pci-ohci" ),
+		NEC_XHCI      ( "nec-xhci" ),
+		QUSB1         ( "qusb1" ),
+		QUSB2         ( "qusb2" ),
+		QEMU_XHCI     ( "qemu-xhci" );
+		// @formatter:on
+
+		/**
+		 * Name of the USB controller device model.
+		 */
+		private String model = null;
+
+		/**
+		 * Creates USB controller device model.
+		 * 
+		 * @param type valid name of the USB controller device model in a Libvirt domain XML document.
+		 */
+		Model( String model )
+		{
+			this.model = model;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.model;
+		}
+
+		/**
+		 * Creates USB controller device model from its name with error check.
+		 * 
+		 * @param type name of the USB controller device model in a Libvirt domain XML document.
+		 * @return valid USB controller device model.
+		 */
+		public static Model fromString( String model )
+		{
+			for ( Model t : Model.values() ) {
+				if ( t.model.equalsIgnoreCase( model ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/Device.java b/src/main/java/org/openslx/libvirt/domain/device/Device.java
new file mode 100644
index 0000000..5c26c55
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/Device.java
@@ -0,0 +1,205 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+/**
+ * A virtual machines device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Device extends LibvirtXmlNode
+{
+	/**
+	 * Creates an empty virtual machine device.
+	 */
+	public Device()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a virtual machine device representing an existing Libvirt XML device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML device element.
+	 */
+	public Device( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Removes device from Libvirt domain XML document.
+	 */
+	public void remove()
+	{
+		Node node = this.getXmlElement();
+		node.getParentNode().removeChild( node );
+	}
+
+	/**
+	 * Creates a Libvirt XML device element as child of a given Libvirt XML parent node.
+	 * 
+	 * @param xmlParentNode parent Libvirt XML node of the Libvirt XML device element that is
+	 *           created.
+	 * @param deviceType type of the Libvirt XML device element.
+	 * @return created Libvirt XML device node.
+	 */
+	private static LibvirtXmlNode createDeviceElement( LibvirtXmlNode xmlParentNode, Type deviceType )
+	{
+		// create XML element as part of the Libvirt XML document
+		Document xmlDocument = xmlParentNode.getXmlDocument();
+		Element deviceNode = xmlDocument.createElement( deviceType.toString() );
+
+		// append the created XML element to the Libvirt XML document
+		xmlParentNode.getXmlBaseNode().appendChild( deviceNode );
+
+		return new LibvirtXmlNode( xmlParentNode.getXmlDocument(), deviceNode );
+	}
+
+	/**
+	 * Creates a non-existent virtual machine device as Libvirt XML device element.
+	 * 
+	 * @param device virtual machine device that is created.
+	 * @param xmlParentNode parent Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created virtual machine device instance.
+	 */
+	public static Device createInstance( Device device, LibvirtXmlNode xmlParentNode )
+	{
+		Device createdDevice = null;
+
+		if ( device instanceof Controller ) {
+			LibvirtXmlNode xmlNode = Device.createDeviceElement( xmlParentNode, Type.CONTROLLER );
+			createdDevice = Controller.createInstance( Controller.class.cast( device ), xmlNode );
+		} else if ( device instanceof Disk ) {
+			LibvirtXmlNode xmlNode = Device.createDeviceElement( xmlParentNode, Type.DISK );
+			createdDevice = Disk.createInstance( Disk.class.cast( device ), xmlNode );
+		} else if ( device instanceof Hostdev ) {
+			LibvirtXmlNode xmlNode = Device.createDeviceElement( xmlParentNode, Type.HOSTDEV );
+			createdDevice = Hostdev.createInstance( Hostdev.class.cast( device ), xmlNode );
+		} else if ( device instanceof Interface ) {
+			LibvirtXmlNode xmlNode = Device.createDeviceElement( xmlParentNode, Type.INTERFACE );
+			createdDevice = Interface.createInstance( Interface.class.cast( device ), xmlNode );
+		} else if ( device instanceof Graphics ) {
+			LibvirtXmlNode xmlNode = Device.createDeviceElement( xmlParentNode, Type.GRAPHICS );
+			createdDevice = Graphics.createInstance( Graphics.class.cast( device ), xmlNode );
+		} else if ( device instanceof Sound ) {
+			LibvirtXmlNode xmlNode = Device.createDeviceElement( xmlParentNode, Type.SOUND );
+			createdDevice = Sound.createInstance( xmlNode );
+		} else if ( device instanceof Video ) {
+			LibvirtXmlNode xmlNode = Device.createDeviceElement( xmlParentNode, Type.VIDEO );
+			createdDevice = Video.createInstance( xmlNode );
+		}
+
+		return createdDevice;
+	}
+
+	/**
+	 * Creates a virtual machine device representing an existing Libvirt XML device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML device element.
+	 * @return virtual machine device instance.
+	 */
+	public static Device newInstance( LibvirtXmlNode xmlNode )
+	{
+
+		Node element = xmlNode.getXmlElement();
+
+		if ( element == null ) {
+			return null;
+		} else {
+			Device device = null;
+			Type type = Type.fromString( element.getNodeName() );
+
+			if ( type == null ) {
+				return null;
+			}
+
+			switch ( type ) {
+			case CONTROLLER:
+				device = Controller.newInstance( xmlNode );
+				break;
+			case DISK:
+				device = Disk.newInstance( xmlNode );
+				break;
+			case HOSTDEV:
+				device = Hostdev.newInstance( xmlNode );
+				break;
+			case INTERFACE:
+				device = Interface.newInstance( xmlNode );
+				break;
+			case GRAPHICS:
+				device = Graphics.newInstance( xmlNode );
+				break;
+			case SOUND:
+				device = Sound.newInstance( xmlNode );
+				break;
+			case VIDEO:
+				device = Video.newInstance( xmlNode );
+				break;
+			}
+
+			return device;
+		}
+	}
+
+	/**
+	 * Type of virtual machine devices.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	enum Type
+	{
+		// @formatter:off
+		CONTROLLER( "controller" ),
+		DISK      ( "disk" ),
+		HOSTDEV   ( "hostdev" ),
+		INTERFACE ( "interface" ),
+		GRAPHICS  ( "graphics" ),
+		SOUND     ( "sound" ),
+		VIDEO     ( "video" );
+		// @formatter:on
+
+		/**
+		 * Name of the virtual machine device type.
+		 */
+		private String type = null;
+
+		/**
+		 * Creates virtual machine device type.
+		 * 
+		 * @param type valid name of the virtual machine device type in a Libvirt domain XML document.
+		 */
+		Type( String type )
+		{
+			this.type = type;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.type;
+		}
+
+		/**
+		 * Creates virtual machine device type from its name with error check.
+		 * 
+		 * @param type name of the virtual machine device type in a Libvirt domain XML document.
+		 * @return valid virtual machine device type.
+		 */
+		public static Type fromString( String type )
+		{
+			for ( Type t : Type.values() ) {
+				if ( t.type.equalsIgnoreCase( type ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/Disk.java b/src/main/java/org/openslx/libvirt/domain/device/Disk.java
new file mode 100644
index 0000000..464e7b6
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/Disk.java
@@ -0,0 +1,427 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+import org.w3c.dom.Node;
+
+/**
+ * A disk (floppy, CDROM, ...) device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Disk extends Device
+{
+	/**
+	 * Creates an empty disk device.
+	 */
+	public Disk()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a disk device representing an existing Libvirt XML disk device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML disk device element.
+	 */
+	public Disk( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns storage type of the disk device.
+	 * 
+	 * @return storage type of underlying source for the disk device.
+	 */
+	public StorageType getStorageType()
+	{
+		String storageType = this.getXmlElementAttributeValue( "type" );
+		return StorageType.fromString( storageType );
+	}
+
+	/**
+	 * Sets storage type for the disk device.
+	 * 
+	 * @param storageType storage type of underlying source for the disk device.
+	 * 
+	 * @implNote Please call {@link #setStorageSource(String)} after calling this method, otherwise
+	 *           the underlying source for the disk device may be invalid.
+	 */
+	protected void setStorageType( StorageType storageType )
+	{
+		this.setXmlElementAttributeValue( "type", storageType.toString() );
+	}
+
+	/**
+	 * Returns underlying source of disk device.
+	 * 
+	 * @return file path to underlying source of disk device.
+	 */
+	public String getStorageSource()
+	{
+		StorageType storageType = this.getStorageType();
+		String storageSource = null;
+
+		switch ( storageType ) {
+		case FILE:
+			storageSource = this.getXmlElementAttributeValue( "source", "file" );
+			break;
+		case BLOCK:
+			storageSource = this.getXmlElementAttributeValue( "source", "bdev" );
+			break;
+		}
+
+		return storageSource;
+	}
+
+	/**
+	 * Sets underlying source for disk device.
+	 * 
+	 * @param source file path to underlying source for disk device.
+	 * 
+	 * @implNote Please call {@link #setStorageType(StorageType)} before calling this method,
+	 *           otherwise the underlying source for the disk device is not set.
+	 */
+	protected void setStorageSource( String source )
+	{
+		StorageType storageType = this.getStorageType();
+
+		// remove all attributes from sub-element 'source'
+		this.removeXmlElementAttributes( "source" );
+
+		// rewrite specific attribute depending on the storage type
+		switch ( storageType ) {
+		case FILE:
+			this.setXmlElementAttributeValue( "source", "file", source );
+			break;
+		case BLOCK:
+			this.setXmlElementAttributeValue( "source", "bdev", source );
+			break;
+		}
+	}
+
+	/**
+	 * Sets storage type and underlying source for disk device.
+	 * 
+	 * @param storageType storage type of underlying source for the disk device.
+	 * @param source file path to underlying source for disk device.
+	 */
+	public void setStorage( StorageType storageType, String source )
+	{
+		this.setStorageType( storageType );
+		this.setStorageSource( source );
+	}
+
+	/**
+	 * Removes underlying source of the disk device.
+	 * 
+	 * @implNote Calling this method will result in an invalid Libvirt domain XML content.
+	 */
+	public void removeStorage()
+	{
+		this.removeXmlElement( "source" );
+	}
+
+	/**
+	 * Removes boot oder entry of the disk device.
+	 */
+	public void removeBootOrder()
+	{
+		this.removeXmlElement( "boot" );
+	}
+
+	/**
+	 * Returns read only state of disk device.
+	 * 
+	 * @return read only state of disk device.
+	 */
+	public boolean isReadOnly()
+	{
+		Node readOnly = this.getXmlElement( "readonly" );
+
+		if ( readOnly == null ) {
+			return false;
+		} else {
+			return true;
+		}
+	}
+
+	/**
+	 * Sets read only state for disk device.
+	 * 
+	 * @param readOnly state for disk device and its read only functionality.
+	 */
+	public void setReadOnly( boolean readOnly )
+	{
+		if ( readOnly ) {
+			this.setXmlElement( "readonly" );
+		} else {
+			this.removeXmlElement( "readonly" );
+		}
+	}
+
+	/**
+	 * Returns bus type of the disk device.
+	 * 
+	 * @return bus type of the disk device.
+	 */
+	public BusType getBusType()
+	{
+		String busType = this.getXmlElementAttributeValue( "target", "bus" );
+		return BusType.fromString( busType );
+	}
+
+	/**
+	 * Sets bus type for the disk device.
+	 * 
+	 * @param busType bus type for the disk device.
+	 */
+	public void setBusType( BusType busType )
+	{
+		this.setXmlElementAttributeValue( "target", "bus", busType.toString() );
+	}
+
+	/**
+	 * Returns target device of the disk device.
+	 * 
+	 * @return target device of the disk device.
+	 */
+	public String getTargetDevice()
+	{
+		return this.getXmlElementAttributeValue( "target", "dev" );
+	}
+
+	/**
+	 * Sets target device for the disk device.
+	 * 
+	 * @param target device for the disk device.
+	 */
+	public void setTargetDevice( String targetDevice )
+	{
+		this.setXmlElementAttributeValue( "target", "dev", targetDevice );
+	}
+
+	/**
+	 * Creates a non-existent disk device as Libvirt XML device element.
+	 * 
+	 * @param disk disk device that is created.
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created disk device instance.
+	 */
+	public static Disk createInstance( Disk disk, LibvirtXmlNode xmlNode )
+	{
+		Disk addedDisk = null;
+
+		if ( disk instanceof DiskCdrom ) {
+			xmlNode.setXmlElementAttributeValue( "device", Type.CDROM.toString() );
+			addedDisk = DiskCdrom.createInstance( xmlNode );
+		} else if ( disk instanceof DiskFloppy ) {
+			xmlNode.setXmlElementAttributeValue( "device", Type.FLOPPY.toString() );
+			addedDisk = DiskFloppy.createInstance( xmlNode );
+		} else if ( disk instanceof DiskStorage ) {
+			xmlNode.setXmlElementAttributeValue( "device", Type.STORAGE.toString() );
+			addedDisk = DiskStorage.createInstance( xmlNode );
+		}
+
+		return addedDisk;
+	}
+
+	/**
+	 * Creates a disk device representing an existing Libvirt XML disk device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML disk device element.
+	 * @return disk device instance.
+	 */
+	public static Disk newInstance( LibvirtXmlNode xmlNode )
+	{
+		Disk deviceDisk = null;
+		Type type = Type.fromString( xmlNode.getXmlElementAttributeValue( "device" ) );
+
+		if ( type == null ) {
+			return null;
+		}
+
+		switch ( type ) {
+		case CDROM:
+			deviceDisk = DiskCdrom.newInstance( xmlNode );
+			break;
+		case FLOPPY:
+			deviceDisk = DiskFloppy.newInstance( xmlNode );
+			break;
+		case STORAGE:
+			deviceDisk = DiskStorage.newInstance( xmlNode );
+			break;
+		}
+
+		return deviceDisk;
+	}
+
+	/**
+	 * Type of disk device.
+	 * 
+	 * Indicates how a disk is to be exposed to the guest OS.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	enum Type
+	{
+		// @formatter:off
+		CDROM  ( "cdrom" ),
+		FLOPPY ( "floppy" ),
+		STORAGE( "disk" );
+		// @formatter:on
+
+		/**
+		 * Name of the disk device type.
+		 */
+		private String type = null;
+
+		/**
+		 * Creates disk device type.
+		 * 
+		 * @param type valid name of the disk device type in a Libvirt domain XML document.
+		 */
+		Type( String type )
+		{
+			this.type = type;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.type;
+		}
+
+		/**
+		 * Creates disk device type from its name with error check.
+		 * 
+		 * @param type name of the disk device type in a Libvirt domain XML document.
+		 * @return valid disk device type.
+		 */
+		public static Type fromString( String type )
+		{
+			for ( Type t : Type.values() ) {
+				if ( t.type.equalsIgnoreCase( type ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+
+	/**
+	 * Storage type of a disk device.
+	 * 
+	 * The storage type refers to the underlying source for the disk.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum StorageType
+	{
+		// @formatter:off
+		FILE  ( "file" ),
+		BLOCK ( "block" );
+		// @formatter:on
+
+		/**
+		 * Name of the disk device type.
+		 */
+		private String storageType = null;
+
+		/**
+		 * Creates disk device storage type.
+		 * 
+		 * @param storageType valid name of the disk device storage type in a Libvirt domain XML
+		 *           document.
+		 */
+		StorageType( String storageType )
+		{
+			this.storageType = storageType;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.storageType;
+		}
+
+		/**
+		 * Creates disk device storage type from its name with error check.
+		 * 
+		 * @param storageType name of the disk device storage type in a Libvirt domain XML document.
+		 * @return valid disk device storage type.
+		 */
+		public static StorageType fromString( String storageType )
+		{
+			for ( StorageType t : StorageType.values() ) {
+				if ( t.storageType.equalsIgnoreCase( storageType ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+
+	/**
+	 * Bus type (IDE, SATA, ...) of a disk device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum BusType
+	{
+		// @formatter:off
+		IDE   ( "ide" ),
+		FDC   ( "fdc" ),
+		SATA  ( "sata" ),
+		SCSI  ( "scsi" ),
+		SD    ( "sd" ),
+		USB   ( "usb" ),
+		VIRTIO( "virtio" ),
+		XEN   ( "xen" );
+		// @formatter:on
+
+		/**
+		 * Name of the disk device bus type.
+		 */
+		private String busType = null;
+
+		/**
+		 * Creates disk device bus type.
+		 * 
+		 * @param busType valid name of the disk device bus type in a Libvirt domain XML document.
+		 */
+		BusType( String busType )
+		{
+			this.busType = busType;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.busType;
+		}
+
+		/**
+		 * Creates disk device bus type from its name with error check.
+		 * 
+		 * @param busType name of the disk device bus type in a Libvirt domain XML document.
+		 * @return valid disk device bus type.
+		 */
+		public static BusType fromString( String busType )
+		{
+			for ( BusType t : BusType.values() ) {
+				if ( t.busType.equalsIgnoreCase( busType ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/DiskCdrom.java b/src/main/java/org/openslx/libvirt/domain/device/DiskCdrom.java
new file mode 100644
index 0000000..2ae08e1
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/DiskCdrom.java
@@ -0,0 +1,55 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A CDROM disk device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class DiskCdrom extends Disk
+{
+	/**
+	 * Creates an empty CDROM disk device.
+	 */
+	public DiskCdrom()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a CDROM disk device representing an existing Libvirt XML CDROM disk device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML CDROM disk device element.
+	 */
+	public DiskCdrom( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+
+		// restrict CDROM disk device default read/write access always to readonly
+		this.setReadOnly( true );
+	}
+
+	/**
+	 * Creates a non-existent CDROM disk device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created CDROM disk device instance.
+	 */
+	public static DiskCdrom createInstance( LibvirtXmlNode xmlNode )
+	{
+		return DiskCdrom.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a CDROM disk device representing an existing Libvirt XML CDROM disk device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML CDROM disk device element.
+	 * @return CDROM disk device instance.
+	 */
+	public static DiskCdrom newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new DiskCdrom( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/DiskFloppy.java b/src/main/java/org/openslx/libvirt/domain/device/DiskFloppy.java
new file mode 100644
index 0000000..ce9733b
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/DiskFloppy.java
@@ -0,0 +1,52 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A floppy disk device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class DiskFloppy extends Disk
+{
+	/**
+	 * Creates an empty floppy disk device.
+	 */
+	public DiskFloppy()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a floppy disk device representing an existing Libvirt XML floppy disk device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML floppy disk device element.
+	 */
+	public DiskFloppy( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent floppy disk device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created floppy disk device instance.
+	 */
+	public static DiskFloppy createInstance( LibvirtXmlNode xmlNode )
+	{
+		return DiskFloppy.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a floppy disk device representing an existing Libvirt XML floppy disk device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML floppy disk device element.
+	 * @return floppy disk device instance.
+	 */
+	public static DiskFloppy newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new DiskFloppy( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/DiskStorage.java b/src/main/java/org/openslx/libvirt/domain/device/DiskStorage.java
new file mode 100644
index 0000000..7fca789
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/DiskStorage.java
@@ -0,0 +1,54 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A storage (HDD, SSD, ...) disk device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class DiskStorage extends Disk
+{
+	/**
+	 * Creates an empty storage disk device.
+	 */
+	public DiskStorage()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a storage disk device representing an existing Libvirt XML storage disk device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML storage disk device element.
+	 */
+	public DiskStorage( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent storage disk device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created storage disk device instance.
+	 */
+	public static DiskStorage createInstance( LibvirtXmlNode xmlNode )
+	{
+		return DiskStorage.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a storage disk device representing an existing Libvirt XML storage disk device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML storage disk device element.
+	 * @return storage disk device instance.
+	 */
+	public static DiskStorage newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new DiskStorage( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/Graphics.java b/src/main/java/org/openslx/libvirt/domain/device/Graphics.java
new file mode 100644
index 0000000..314dba2
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/Graphics.java
@@ -0,0 +1,138 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A graphics (display) device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Graphics extends Device
+{
+	/**
+	 * Creates an empty graphics device.
+	 */
+	public Graphics()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a graphics device representing an existing Libvirt XML graphics device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML graphics device element.
+	 */
+	public Graphics( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent graphics device as Libvirt XML device element.
+	 * 
+	 * @param graphics graphics device that is created.
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created graphics device instance.
+	 */
+	public static Graphics createInstance( Graphics graphics, LibvirtXmlNode xmlNode )
+	{
+		Graphics addedGraphics = null;
+
+		if ( graphics instanceof GraphicsSdl ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.SDL.toString() );
+			addedGraphics = GraphicsSdl.createInstance( xmlNode );
+		} else if ( graphics instanceof GraphicsSpice ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.SPICE.toString() );
+			addedGraphics = GraphicsSpice.createInstance( xmlNode );
+		} else if ( graphics instanceof GraphicsVnc ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.VNC.toString() );
+			addedGraphics = GraphicsVnc.createInstance( xmlNode );
+		}
+
+		return addedGraphics;
+	}
+
+	/**
+	 * Creates a graphics device representing an existing Libvirt XML graphics device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML graphics device element.
+	 * @return graphics device instance.
+	 */
+	public static Graphics newInstance( LibvirtXmlNode xmlNode )
+	{
+		Graphics deviceGraphics = null;
+		Type type = Type.fromString( xmlNode.getXmlElementAttributeValue( "type" ) );
+
+		if ( type == null ) {
+			return null;
+		}
+
+		switch ( type ) {
+		case SDL:
+			deviceGraphics = GraphicsSdl.newInstance( xmlNode );
+			break;
+		case SPICE:
+			deviceGraphics = GraphicsSpice.newInstance( xmlNode );
+			break;
+		case VNC:
+			deviceGraphics = GraphicsVnc.newInstance( xmlNode );
+			break;
+		}
+
+		return deviceGraphics;
+	}
+
+	/**
+	 * Type of graphics device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	enum Type
+	{
+		// @formatter:off
+		SDL  ( "sdl" ),
+		SPICE( "spice" ),
+		VNC  ( "vnc" );
+      // @formatter:on
+
+		/**
+		 * Name of graphics device type.
+		 */
+		private String type = null;
+
+		/**
+		 * Creates graphics device type.
+		 * 
+		 * @param type valid name of the graphics device type in a Libvirt domain XML document.
+		 */
+		Type( String type )
+		{
+			this.type = type;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.type;
+		}
+
+		/**
+		 * Creates graphics device type from its name with error check.
+		 * 
+		 * @param type name of the graphics device type in a Libvirt domain XML document.
+		 * @return valid graphics device type.
+		 */
+		public static Type fromString( String type )
+		{
+			for ( Type t : Type.values() ) {
+				if ( t.type.equalsIgnoreCase( type ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/GraphicsSdl.java b/src/main/java/org/openslx/libvirt/domain/device/GraphicsSdl.java
new file mode 100644
index 0000000..c77f56d
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/GraphicsSdl.java
@@ -0,0 +1,54 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A graphics SDL device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class GraphicsSdl extends Graphics
+{
+	/**
+	 * Creates an empty graphics SDL device.
+	 */
+	public GraphicsSdl()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a graphics SDL device representing an existing Libvirt XML graphics SDL device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML graphics SDL device element.
+	 */
+	public GraphicsSdl( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent graphics SDL device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created graphics SDL device instance.
+	 */
+	public static GraphicsSdl createInstance( LibvirtXmlNode xmlNode )
+	{
+		return GraphicsSdl.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a graphics SDL device representing an existing Libvirt XML graphics SDL device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML graphics SDL device element.
+	 * @return graphics SDL device instance.
+	 */
+	public static GraphicsSdl newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new GraphicsSdl( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/GraphicsSpice.java b/src/main/java/org/openslx/libvirt/domain/device/GraphicsSpice.java
new file mode 100644
index 0000000..f087296
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/GraphicsSpice.java
@@ -0,0 +1,74 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A graphics SPICE device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class GraphicsSpice extends Graphics
+{
+	/**
+	 * Creates an empty graphics SPICE device.
+	 */
+	public GraphicsSpice()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a graphics SPICE device representing an existing Libvirt XML graphics SPICE device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML graphics SPCIE device element.
+	 */
+	public GraphicsSpice( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns the state whether OpenGL hardware acceleration is enabled or not.
+	 * 
+	 * @return tate whether OpenGL hardware acceleration is enabled or not.
+	 */
+	public boolean isOpenGlEnabled()
+	{
+		return this.getXmlElementAttributeValueAsBool( "gl", "enable" );
+	}
+
+	/**
+	 * Sets the state whether OpenGL hardware acceleration is enabled or not.
+	 * 
+	 * @param enabled state whether OpenGL hardware acceleration is enabled or not.
+	 */
+	public void setOpenGl( boolean enabled )
+	{
+		this.setXmlElementAttributeValue( "gl", "enable", enabled );
+	}
+
+	/**
+	 * Creates a non-existent graphics SPICE device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created graphics SPICE device instance.
+	 */
+	public static GraphicsSpice createInstance( LibvirtXmlNode xmlNode )
+	{
+		return GraphicsSpice.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a graphics SPICE device representing an existing Libvirt XML graphics SPICE device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML graphics SPICE device element.
+	 * @return graphics SPICE device instance.
+	 */
+	public static GraphicsSpice newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new GraphicsSpice( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/GraphicsVnc.java b/src/main/java/org/openslx/libvirt/domain/device/GraphicsVnc.java
new file mode 100644
index 0000000..f595699
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/GraphicsVnc.java
@@ -0,0 +1,54 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A graphics VNC device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class GraphicsVnc extends Graphics
+{
+	/**
+	 * Creates an empty graphics VNC device.
+	 */
+	public GraphicsVnc()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a graphics VNC device representing an existing Libvirt XML graphics VNC device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML graphics VNC device element.
+	 */
+	public GraphicsVnc( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent graphics VNC device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created graphics VNC device instance.
+	 */
+	public static GraphicsVnc createInstance( LibvirtXmlNode xmlNode )
+	{
+		return GraphicsVnc.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a graphics VNC device representing an existing Libvirt XML graphics VNC device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML graphics VNC device element.
+	 * @return graphics VNC device instance.
+	 */
+	public static GraphicsVnc newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new GraphicsVnc( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/Hostdev.java b/src/main/java/org/openslx/libvirt/domain/device/Hostdev.java
new file mode 100644
index 0000000..cb09099
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/Hostdev.java
@@ -0,0 +1,139 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A hostdev device node in a Libvirt domain XML document for PCI, USB, ... passthrough.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Hostdev extends Device
+{
+	/**
+	 * Creates an empty hostdev device.
+	 */
+	public Hostdev()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a hostdev device representing an existing Libvirt XML hostdev device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML hostdev device element.
+	 */
+	public Hostdev( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Removes boot oder entry of the hostdev device.
+	 */
+	public void removeBootOrder()
+	{
+		this.removeXmlElement( "boot" );
+	}
+
+	/**
+	 * Creates a non-existent hostdev device as Libvirt XML device element.
+	 * 
+	 * @param hostdev hostdev device that is created.
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created hostdev device instance.
+	 */
+	public static Hostdev createInstance( Hostdev hostdev, LibvirtXmlNode xmlNode )
+	{
+		Hostdev addedHostdev = null;
+
+		if ( hostdev instanceof HostdevPci ) {
+			xmlNode.setXmlElementAttributeValue( "device", Type.PCI.toString() );
+			addedHostdev = HostdevPci.createInstance( xmlNode );
+		} else if ( hostdev instanceof HostdevUsb ) {
+			xmlNode.setXmlElementAttributeValue( "device", Type.USB.toString() );
+			addedHostdev = HostdevUsb.createInstance( xmlNode );
+		}
+
+		return addedHostdev;
+	}
+
+	/**
+	 * Creates a hostdev device representing an existing Libvirt XML hostdev device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML hostdev device element.
+	 * @return hostdev device instance.
+	 */
+	public static Hostdev newInstance( LibvirtXmlNode xmlNode )
+	{
+		Hostdev deviceHostdev = null;
+		Type type = Type.fromString( xmlNode.getXmlElementAttributeValue( "type" ) );
+
+		if ( type == null ) {
+			return null;
+		}
+
+		switch ( type ) {
+		case PCI:
+			deviceHostdev = HostdevPci.newInstance( xmlNode );
+			break;
+		case USB:
+			deviceHostdev = HostdevUsb.newInstance( xmlNode );
+			break;
+		}
+
+		return deviceHostdev;
+	}
+
+	/**
+	 * Type of hostdev device subsystem passthrough.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	enum Type
+	{
+		// @formatter:off
+		PCI( "pci" ),
+		USB( "usb" );
+		// @formatter:on
+
+		/**
+		 * Name of the hostdev device type.
+		 */
+		private String type = null;
+
+		/**
+		 * Creates hostdev device type.
+		 * 
+		 * @param type valid name of the hostdev device type in a Libvirt domain XML document.
+		 */
+		Type( String type )
+		{
+			this.type = type;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.type;
+		}
+
+		/**
+		 * Creates hostdev device type from its name with error check.
+		 * 
+		 * @param type name of the hostdev device storage in a Libvirt domain XML document.
+		 * @return valid hostdev device type.
+		 */
+		public static Type fromString( String type )
+		{
+			for ( Type t : Type.values() ) {
+				if ( t.type.equalsIgnoreCase( type ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/HostdevPci.java b/src/main/java/org/openslx/libvirt/domain/device/HostdevPci.java
new file mode 100644
index 0000000..3b26fb0
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/HostdevPci.java
@@ -0,0 +1,79 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A hostdev PCI device node in a Libvirt domain XML document for PCI passthrough.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class HostdevPci extends Hostdev
+{
+	/**
+	 * Creates an empty hostdev PCI device.
+	 */
+	public HostdevPci()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a hostdev PCI device representing an existing Libvirt XML hostdev PCI device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML hostdev PCI device element.
+	 */
+	public HostdevPci( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Checks if PCI hostdev device is managed.
+	 * 
+	 * If {@link #isManaged()} returns <code>true</code> the hostdev PCI device is detached from the
+	 * host before being passed on to the guest and reattached to the host after the guest exits.
+	 * 
+	 * @return state whether PCI hostdev device is managed.
+	 */
+	public boolean isManaged()
+	{
+		return this.getXmlElementAttributeValueAsBool( "managed" );
+	}
+
+	/**
+	 * Sets state whether PCI hostdev device is managed.
+	 * 
+	 * If the <code>managed</code> parameter is set to <code>true</code> the PCI hostdev device is
+	 * detached from the host before being passed on to the guest and reattached to the host after
+	 * the guest exits.
+	 * 
+	 * @return state whether PCI hostdev device is managed.
+	 */
+	public void setManaged( boolean managed )
+	{
+		this.setXmlElementAttributeValue( "managed", managed );
+	}
+
+	/**
+	 * Creates a non-existent hostdev PCI device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created hostdev PCI device instance.
+	 */
+	public static HostdevPci createInstance( LibvirtXmlNode xmlNode )
+	{
+		return HostdevPci.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a hostdev PCI device representing an existing Libvirt XML hostdev PCI device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML hostdev PCI device element.
+	 * @return hostdev PCI device instance.
+	 */
+	public static HostdevPci newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new HostdevPci( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/HostdevUsb.java b/src/main/java/org/openslx/libvirt/domain/device/HostdevUsb.java
new file mode 100644
index 0000000..e1fcc0c
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/HostdevUsb.java
@@ -0,0 +1,52 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A hostdev USB device node in a Libvirt domain XML document for USB passthrough.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class HostdevUsb extends Hostdev
+{
+	/**
+	 * Creates an empty hostdev USB device.
+	 */
+	public HostdevUsb()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a hostdev USB device representing an existing Libvirt XML hostdev USB device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML hostdev USB device element.
+	 */
+	public HostdevUsb( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent hostdev USB device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created hostdev USB device instance.
+	 */
+	public static HostdevUsb createInstance( LibvirtXmlNode xmlNode )
+	{
+		return HostdevUsb.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a hostdev USB device representing an existing Libvirt XML hostdev USB device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML hostdev USB device element.
+	 * @return hostdev USB device instance.
+	 */
+	public static HostdevUsb newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new HostdevUsb( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/Interface.java b/src/main/java/org/openslx/libvirt/domain/device/Interface.java
new file mode 100644
index 0000000..b09c7da
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/Interface.java
@@ -0,0 +1,316 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A network interface device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Interface extends Device
+{
+	/**
+	 * Creates an empty network device.
+	 */
+	public Interface()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a network device representing an existing Libvirt XML network interface device
+	 * element.
+	 * 
+	 * @param xmlNode existing Libvirt XML network interface device element.
+	 */
+	public Interface( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns hardware model of the network device.
+	 * 
+	 * @return hardware model of the network device.
+	 */
+	public Model getModel()
+	{
+		String model = this.getXmlElementAttributeValue( "model", "type" );
+		return Model.fromString( model );
+	}
+
+	/**
+	 * Sets hardware model for the network device.
+	 * 
+	 * @param model hardware model for the network device.
+	 */
+	public void setModel( Model model )
+	{
+		this.setXmlElementAttributeValue( "model", "type", model.toString() );
+	}
+
+	/**
+	 * Returns type of the network device.
+	 * 
+	 * @return type of the network device.
+	 */
+	public Type getType()
+	{
+		return Type.fromString( this.getXmlElementAttributeValue( "type" ) );
+	}
+	
+	/**
+	 * Sets type of the network device.
+	 * 
+	 * @return type of the network device.
+	 */
+	public void setType(Type type)
+	{
+		String source = this.getSource();
+		
+		// change type and set source again
+		this.setXmlElementAttributeValue( "type", type.toString() );
+		this.setSource( source );
+	}
+
+	/**
+	 * Returns the source of the network device.
+	 * 
+	 * @return source of the network device.
+	 */
+	public String getSource()
+	{
+		Type type = this.getType();
+		String source = null;
+
+		switch ( type ) {
+		case BRIDGE:
+			source = this.getXmlElementAttributeValue( "source", "bridge" );
+			break;
+		case NETWORK:
+			source = this.getXmlElementAttributeValue( "source", "network" );
+			break;
+		}
+
+		return source;
+	}
+
+	/**
+	 * Sets the source for the network device.
+	 * 
+	 * @param source for the network device.
+	 */
+	public void setSource( String source )
+	{
+		Type type = this.getType();
+
+		// remove all attributes from sub-element 'source'
+		this.removeXmlElementAttributes( "source" );
+
+		switch ( type ) {
+		case BRIDGE:
+			this.setXmlElementAttributeValue( "source", "bridge", source );
+			break;
+		case NETWORK:
+			this.setXmlElementAttributeValue( "source", "network", source );
+			break;
+		}
+	}
+
+	/**
+	 * Removes boot oder entry of the network interface device.
+	 */
+	public void removeBootOrder()
+	{
+		this.removeXmlElement( "boot" );
+	}
+
+	/**
+	 * Removes network source of the network interface device.
+	 */
+	public void removeSource()
+	{
+		this.removeXmlElement( "source" );
+	}
+
+	/**
+	 * Creates a non-existent network interface device as Libvirt XML device element.
+	 * 
+	 * @param iface network device that is created.
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created network device instance.
+	 */
+	public static Interface createInstance( Interface iface, LibvirtXmlNode xmlNode )
+	{
+		Interface addedInterface = null;
+
+		if ( iface instanceof InterfaceBridge ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.BRIDGE.toString() );
+			addedInterface = InterfaceBridge.createInstance( xmlNode );
+		} else if ( iface instanceof InterfaceNetwork ) {
+			xmlNode.setXmlElementAttributeValue( "type", Type.NETWORK.toString() );
+			addedInterface = InterfaceNetwork.createInstance( xmlNode );
+		}
+
+		return addedInterface;
+	}
+
+	/**
+	 * Creates a network interface device representing an existing Libvirt XML network interface
+	 * device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML network interface device element.
+	 * @return network interface device instance.
+	 */
+	public static Interface newInstance( LibvirtXmlNode xmlNode )
+	{
+		Interface deviceInterface = null;
+		Type type = Type.fromString( xmlNode.getXmlElementAttributeValue( "type" ) );
+
+		if ( type == null ) {
+			return null;
+		}
+
+		switch ( type ) {
+		case BRIDGE:
+			deviceInterface = InterfaceBridge.newInstance( xmlNode );
+			break;
+		case NETWORK:
+			deviceInterface = InterfaceNetwork.newInstance( xmlNode );
+			break;
+		}
+
+		return deviceInterface;
+	}
+
+	/**
+	 * Type of network interface device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum Type
+	{
+		// @formatter:off
+		BRIDGE ( "bridge" ),
+		NETWORK( "network" );
+		// @formatter:on
+
+		/**
+		 * Name of the network interface device type.
+		 */
+		private String type = null;
+
+		/**
+		 * Creates network interface device type.
+		 * 
+		 * @param type valid name of the network interface device type in a Libvirt domain XML
+		 *           document.
+		 */
+		Type( String type )
+		{
+			this.type = type;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.type;
+		}
+
+		/**
+		 * Creates network interface device type from its name with error check.
+		 * 
+		 * @param type name of the network interface device type in a Libvirt domain XML document.
+		 * @return valid network interface device type.
+		 */
+		public static Type fromString( String type )
+		{
+			for ( Type t : Type.values() ) {
+				if ( t.type.equalsIgnoreCase( type ) ) {
+					return t;
+				}
+			}
+
+			return null;
+		}
+	}
+
+	/**
+	 * Model of network interface device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum Model
+	{
+		// @formatter:off
+		E1000                          ( "e1000" ),
+		E1000_82544GC                  ( "e1000-82544gc" ),
+		E1000_82545EM                  ( "e1000-82545em" ),
+		E1000E                         ( "e1000e" ),
+		I82550                         ( "i82550" ), 
+		I82551                         ( "i82551" ), 
+		I82557A                        ( "i82557a" ), 
+		I82557B                        ( "i82557b" ), 
+		I82557C                        ( "i82557c" ), 
+		I82558A                        ( "i82558a" ),
+		I82558B                        ( "i82558b" ),
+		I82559A                        ( "i82559a" ),
+		I82559B                        ( "i82559b" ),
+		I82559C                        ( "i82559c" ),
+		I82559ER                       ( "i82559er" ),
+		I82562                         ( "i82562" ),
+		I82801                         ( "i82801" ),
+		NE2K_PCI                       ( "ne2k_pci" ),
+		PCNET                          ( "pcnet" ),
+		RTL8139                        ( "rtl8139" ),
+		TULIP                          ( "tulip" ),
+		VIRTIO                         ( "virtio" ),
+		VIRTIO_NET_PCI                 ( "virtio-net-pci" ),
+		VIRTIO_NET_PCI_NON_TRANSITIONAL( "virtio-net-pci-non-transitional" ),
+		VIRTIO_NET_PCI_TRANSITIONAL    ( "virtio-net-pci-transitional" ),
+		VMXNET3                        ( "vmxnet3" );
+		// @formatter:on
+
+		/**
+		 * Name of the network interface device model.
+		 */
+		private String model = null;
+
+		/**
+		 * Creates network interface device model.
+		 * 
+		 * @param type valid name of the network interface device model in a Libvirt domain XML
+		 *           document.
+		 */
+		Model( String model )
+		{
+			this.model = model;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.model;
+		}
+
+		/**
+		 * Creates network interface device model from its name with error check.
+		 * 
+		 * @param type name of the network interface device model in a Libvirt domain XML document.
+		 * @return valid network interface device model.
+		 */
+		public static Model fromString( String model )
+		{
+			for ( Model m : Model.values() ) {
+				if ( m.model.equalsIgnoreCase( model ) ) {
+					return m;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/InterfaceBridge.java b/src/main/java/org/openslx/libvirt/domain/device/InterfaceBridge.java
new file mode 100644
index 0000000..02eabb0
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/InterfaceBridge.java
@@ -0,0 +1,54 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A network bridge interface device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class InterfaceBridge extends Interface
+{
+	/**
+	 * Creates an empty network bridge interface device.
+	 */
+	public InterfaceBridge()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a network bridge interface device representing an existing Libvirt XML network bridge
+	 * interface device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML network bridge interface device element.
+	 */
+	public InterfaceBridge( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent network bridge interface device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created network bridge interface device instance.
+	 */
+	public static InterfaceBridge createInstance( LibvirtXmlNode xmlNode )
+	{
+		return InterfaceBridge.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a network bridge interface device representing an existing Libvirt XML network bridge
+	 * interface device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML network bridge interface device element.
+	 * @return network bridge interface device instance.
+	 */
+	public static InterfaceBridge newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new InterfaceBridge( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/InterfaceNetwork.java b/src/main/java/org/openslx/libvirt/domain/device/InterfaceNetwork.java
new file mode 100644
index 0000000..ae1fd40
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/InterfaceNetwork.java
@@ -0,0 +1,54 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A network interface device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class InterfaceNetwork extends Interface
+{
+	/**
+	 * Creates an empty network interface device.
+	 */
+	public InterfaceNetwork()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a network interface device representing an existing Libvirt XML network interface
+	 * device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML network interface device element.
+	 */
+	public InterfaceNetwork( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Creates a non-existent network interface device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created network interface device device instance.
+	 */
+	public static InterfaceNetwork createInstance( LibvirtXmlNode xmlNode )
+	{
+		return InterfaceNetwork.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a network interface device representing an existing Libvirt XML network interface
+	 * device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML network interface device element.
+	 * @return network interface device instance.
+	 */
+	public static InterfaceNetwork newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new InterfaceNetwork( xmlNode );
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/Sound.java b/src/main/java/org/openslx/libvirt/domain/device/Sound.java
new file mode 100644
index 0000000..e424ed4
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/Sound.java
@@ -0,0 +1,128 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A sound device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Sound extends Device
+{
+	/**
+	 * Creates an empty sound device.
+	 */
+	public Sound()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a sound device representing an existing Libvirt XML sound device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML sound device element.
+	 */
+	public Sound( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns hardware model of the sound device.
+	 * 
+	 * @return hardware model of the sound device.
+	 */
+	public Model getModel()
+	{
+		String model = this.getXmlElementAttributeValue( "model" );
+		return Model.fromString( model );
+	}
+
+	/**
+	 * Sets hardware model for the sound device.
+	 * 
+	 * @param model hardware model for the sound device.
+	 */
+	public void setModel( Model model )
+	{
+		this.setXmlElementAttributeValue( "model", model.toString() );
+	}
+
+	/**
+	 * Creates a non-existent sound device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created sound device instance.
+	 */
+	public static Sound createInstance( LibvirtXmlNode xmlNode )
+	{
+		return Sound.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a sound device representing an existing Libvirt XML sound device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML sound device element.
+	 * @return sound device instance.
+	 */
+	public static Sound newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new Sound( xmlNode );
+	}
+
+	/**
+	 * Model of sound device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum Model
+	{
+		// @formatter:off
+		AC97  ( "ac97" ),
+		ES1370( "es1370" ),
+		ICH6  ( "ich6" ),
+		ICH9  ( "ich9" ),
+		SB16  ( "sb16" );
+		// @formatter:on
+
+		/**
+		 * Name of the sound device model.
+		 */
+		private String model;
+
+		/**
+		 * Creates sound device model.
+		 * 
+		 * @param type valid name of the sound device model in a Libvirt domain XML document.
+		 */
+		Model( String model )
+		{
+			this.model = model;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.model;
+		}
+
+		/**
+		 * Creates sound device model from its name with error check.
+		 * 
+		 * @param type name of the sound device model in a Libvirt domain XML document.
+		 * @return valid sound device model.
+		 */
+		public static Model fromString( String model )
+		{
+			for ( Model m : Model.values() ) {
+				if ( m.model.equalsIgnoreCase( model ) ) {
+					return m;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/org/openslx/libvirt/domain/device/Video.java b/src/main/java/org/openslx/libvirt/domain/device/Video.java
new file mode 100644
index 0000000..e901b85
--- /dev/null
+++ b/src/main/java/org/openslx/libvirt/domain/device/Video.java
@@ -0,0 +1,188 @@
+package org.openslx.libvirt.domain.device;
+
+import org.openslx.libvirt.xml.LibvirtXmlNode;
+
+/**
+ * A video (GPU) device node in a Libvirt domain XML document.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class Video extends Device
+{
+	/**
+	 * Creates an empty video device.
+	 */
+	public Video()
+	{
+		super();
+	}
+
+	/**
+	 * Creates a video device representing an existing Libvirt XML video device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML video device element.
+	 */
+	public Video( LibvirtXmlNode xmlNode )
+	{
+		super( xmlNode );
+	}
+
+	/**
+	 * Returns hardware model of the video device.
+	 * 
+	 * @return hardware model of the video device.
+	 */
+	public Model getModel()
+	{
+		String model = this.getXmlElementAttributeValue( "model", "type" );
+		return Model.fromString( model );
+	}
+
+	/**
+	 * Sets hardware model for the video device.
+	 * 
+	 * @param model hardware model for the video device.
+	 */
+	public void setModel( Model model )
+	{
+		this.setXmlElementAttributeValue( "model", "type", model.toString() );
+	}
+
+	/**
+	 * Checks whether 2D hardware video acceleration is turned on or off.
+	 * 
+	 * @return state of 2D hardware video acceleration.
+	 */
+	public boolean get2DAcceleration()
+	{
+		return this.getXmlElementAttributeValueAsBool( "model/acceleration", "accel2d" );
+	}
+
+	/**
+	 * Turns 2D hardware video acceleration on or off.
+	 * 
+	 * @param acceleration state of 2D hardware video acceleration.
+	 */
+	public void set2DAcceleration( boolean acceleration )
+	{
+		Model model = this.getModel();
+
+		if ( model != null ) {
+			if ( model == Model.VIRTIO ) {
+				// only set acceleration on supported Virtio GPUs
+				this.setXmlElementAttributeValue( "model/acceleration", "accel2d", acceleration );
+			} else {
+				String errorMsg = new String(
+						"Video card model '" + model.toString() + "' does not support enabled 2D hardware acceleration." );
+				throw new IllegalArgumentException( errorMsg );
+			}
+		}
+	}
+
+	/**
+	 * Checks whether 3D hardware video acceleration is turned on or off.
+	 * 
+	 * @return state of 3D hardware video acceleration.
+	 */
+	public boolean get3DAcceleration()
+	{
+		return this.getXmlElementAttributeValueAsBool( "model/acceleration", "accel3d" );
+	}
+
+	/**
+	 * Turns 3D hardware video acceleration on or off.
+	 * 
+	 * @param acceleration state of 3D hardware video acceleration.
+	 */
+	public void set3DAcceleration( boolean acceleration )
+	{
+		Model model = this.getModel();
+
+		if ( model == Model.VIRTIO ) {
+			// only set acceleration on supported Virtio GPUs
+			this.setXmlElementAttributeValue( "model/acceleration", "accel3d", acceleration );
+		} else {
+			String errorMsg = new String(
+					"Video card model '" + model.toString() + "' does not support enabled 3D hardware acceleration." );
+			throw new IllegalArgumentException( errorMsg );
+		}
+	}
+
+	/**
+	 * Creates a non-existent video device as Libvirt XML device element.
+	 * 
+	 * @param xmlNode Libvirt XML node of the Libvirt XML device that is created.
+	 * @return created video device instance.
+	 */
+	public static Video createInstance( LibvirtXmlNode xmlNode )
+	{
+		return Video.newInstance( xmlNode );
+	}
+
+	/**
+	 * Creates a video device representing an existing Libvirt XML video device element.
+	 * 
+	 * @param xmlNode existing Libvirt XML video device element.
+	 * @return video device instance.
+	 */
+	public static Video newInstance( LibvirtXmlNode xmlNode )
+	{
+		return new Video( xmlNode );
+	}
+
+	/**
+	 * Model of video device.
+	 * 
+	 * @author Manuel Bentele
+	 * @version 1.0
+	 */
+	public enum Model
+	{
+		// @formatter:off
+		NONE  ( "none" ),
+		QXL   ( "qxl" ),
+		VGA   ( "vga" ),
+		VMVGA ( "vmvga" ),
+		VIRTIO( "virtio" );
+		// @formatter:on
+
+		/**
+		 * Name of the video device model.
+		 */
+		private String model = null;
+
+		/**
+		 * Creates video device model.
+		 * 
+		 * @param type valid name of the video device model in a Libvirt domain XML document.
+		 */
+		Model( String model )
+		{
+			this.model = model;
+		}
+
+		@Override
+		public String toString()
+		{
+			return this.model;
+		}
+
+		/**
+		 * Creates video device model from its name with error check.
+		 * 
+		 * @param type name of the video device model in a Libvirt domain XML document.
+		 * @return valid video device model.
+		 */
+		public static Model fromString( String model )
+		{
+			for ( Model m : Model.values() ) {
+				if ( m.model.equalsIgnoreCase( model ) ) {
+					return m;
+				}
+			}
+
+			return null;
+		}
+	}
+}
diff --git a/src/test/java/org/openslx/libvirt/domain/DomainTest.java b/src/test/java/org/openslx/libvirt/domain/DomainTest.java
new file mode 100644
index 0000000..a604b21
--- /dev/null
+++ b/src/test/java/org/openslx/libvirt/domain/DomainTest.java
@@ -0,0 +1,294 @@
+package org.openslx.libvirt.domain;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.fail;
+
+import java.math.BigInteger;
+
+import org.apache.log4j.Level;
+import org.apache.log4j.LogManager;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.openslx.libvirt.domain.Domain.CpuCheck;
+import org.openslx.libvirt.domain.Domain.CpuMode;
+import org.openslx.libvirt.xml.LibvirtXmlDocumentException;
+import org.openslx.libvirt.xml.LibvirtXmlSerializationException;
+import org.openslx.libvirt.xml.LibvirtXmlTestResources;
+import org.openslx.libvirt.xml.LibvirtXmlValidationException;
+
+public class DomainTest
+{
+	@BeforeAll
+	public static void setUp()
+	{
+		// disable logging with log4j
+		LogManager.getRootLogger().setLevel( Level.OFF );
+	}
+
+	private Domain newDomainInstance( String xmlFileName )
+	{
+		Domain domain = null;
+
+		try {
+			domain = new Domain( LibvirtXmlTestResources.getLibvirtXmlFile( xmlFileName ) );
+		} catch ( LibvirtXmlDocumentException | LibvirtXmlSerializationException | LibvirtXmlValidationException e ) {
+			String errorMsg = new String( "Cannot prepare requested Libvirt domain XML file from the resources folder" );
+			fail( errorMsg );
+		}
+
+		return domain;
+	}
+
+	@Test
+	@DisplayName( "Get VM type from libvirt XML file" )
+	public void testGetType()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( Domain.Type.KVM.toString(), vm.getType().toString() );
+	}
+
+	@Test
+	@DisplayName( "Set VM type from libvirt XML file" )
+	public void testSetType()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setType( Domain.Type.QEMU );
+		assertEquals( Domain.Type.QEMU.toString(), vm.getType().toString() );
+	}
+
+	@Test
+	@DisplayName( "Get VM name from libvirt XML file" )
+	public void testGetName()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( "ubuntu-20-04", vm.getName() );
+	}
+
+	@Test
+	@DisplayName( "Set VM name in libvirt XML file" )
+	public void testSetName()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setName( "ubuntu-18-04" );
+		assertEquals( "ubuntu-18-04", vm.getName() );
+	}
+
+	@Test
+	@DisplayName( "Get VM title from libvirt XML file" )
+	public void testGetTitle()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( "Ubuntu 20.04", vm.getTitle() );
+	}
+
+	@Test
+	@DisplayName( "Set VM title in libvirt XML file" )
+	public void testSetTitle()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setTitle( "Ubuntu 18.04" );
+		assertEquals( "Ubuntu 18.04", vm.getTitle() );
+	}
+
+	@Test
+	@DisplayName( "Get VM description from libvirt XML file" )
+	public void testGetDescription()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( "Ubuntu 20.04 desktop installation", vm.getDescription() );
+	}
+
+	@Test
+	@DisplayName( "Set VM description in libvirt XML file" )
+	public void testSetDescription()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setDescription( "Ubuntu 18.04 server installation" );
+		assertEquals( "Ubuntu 18.04 server installation", vm.getDescription() );
+	}
+
+	@Test
+	@DisplayName( "Get VM UUID from libvirt XML file" )
+	public void testGetUuid()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( "8dc5433c-0228-49e4-b019-fa2b606aa544", vm.getUuid() );
+	}
+
+	@Test
+	@DisplayName( "Set VM UUID in libvirt XML file" )
+	public void testSetUuid()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setUuid( "5ab08167-3d95-400e-ac83-e6af8d150971" );
+		assertEquals( "5ab08167-3d95-400e-ac83-e6af8d150971", vm.getUuid() );
+	}
+
+	@Test
+	@DisplayName( "Get VM memory from libvirt XML file" )
+	public void testGetMemory()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( new BigInteger( "4294967296" ).toString(), vm.getMemory().toString() );
+	}
+
+	@Test
+	@DisplayName( "Set VM memory in libvirt XML file" )
+	public void testSetMemory()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setMemory( new BigInteger( "12073740288" ) );
+		assertEquals( new BigInteger( "12073740288" ).toString(), vm.getMemory().toString() );
+	}
+
+	@Test
+	@DisplayName( "Get current VM memory from libvirt XML file" )
+	public void testGetCurrentMemory()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( new BigInteger( "4294967296" ).toString(), vm.getCurrentMemory().toString() );
+	}
+
+	@Test
+	@DisplayName( "Set current VM memory in libvirt XML file" )
+	public void testSetCurrentMemory()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setCurrentMemory( new BigInteger( "8087237632" ) );
+		assertEquals( new BigInteger( "8087237632" ).toString(), vm.getCurrentMemory().toString() );
+	}
+
+	@Test
+	@DisplayName( "Get VM number of vCpus from libvirt XML file" )
+	public void testGetVCpu()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 2, vm.getVCpu() );
+	}
+
+	@Test
+	@DisplayName( "Set VM number of vCpus in libvirt XML file" )
+	public void testSetVCpu()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setVCpu( 4 );
+		assertEquals( 4, vm.getVCpu() );
+	}
+
+	@Test
+	@DisplayName( "Get VM CPU model from libvirt XML file" )
+	public void testGetCpuModel()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertNull( vm.getCpuModel() );
+	}
+
+	@Test
+	@DisplayName( "Set VM CPU model in libvirt XML file" )
+	public void testSetCpuModel()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setCpuModel( "core2duo" );
+		assertEquals( "core2duo", vm.getCpuModel() );
+	}
+
+	@Test
+	@DisplayName( "Get VM CPU mode from libvirt XML file" )
+	public void testGetCpuModelMode()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( CpuMode.HOST_MODEL.toString(), vm.getCpuMode().toString() );
+	}
+
+	@Test
+	@DisplayName( "Set VM CPU mode in libvirt XML file" )
+	public void testSetCpuModelMode()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setCpuMode( CpuMode.HOST_PASSTHROUGH );
+		assertEquals( CpuMode.HOST_PASSTHROUGH.toString(), vm.getCpuMode().toString() );
+	}
+
+	@Test
+	@DisplayName( "Get VM CPU check from libvirt XML file" )
+	public void testGetCpuCheck()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( CpuCheck.PARTIAL.toString(), vm.getCpuCheck().toString() );
+	}
+
+	@Test
+	@DisplayName( "Set VM CPU check in libvirt XML file" )
+	public void testSetCpuCheck()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		vm.setCpuCheck( CpuCheck.NONE );
+		assertEquals( CpuCheck.NONE.toString(), vm.getCpuCheck().toString() );
+	}
+
+	@Test
+	@DisplayName( "Get all VM devices from libvirt XML file" )
+	public void testGetDevices()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 21, vm.getDevices().size() );
+	}
+
+	@Test
+	@DisplayName( "Get all VM controller devices from libvirt XML file" )
+	public void testGetControllerDevices()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 14, vm.getControllerDevices().size() );
+	}
+
+	@Test
+	@DisplayName( "Get all VM disk devices from libvirt XML file" )
+	public void testGetDiskDevices()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 3, vm.getDiskDevices().size() );
+	}
+
+	@Test
+	@DisplayName( "Get all VM hostdev devices from libvirt XML file" )
+	public void testGetHostdevDevices()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 0, vm.getHostdevDevices().size() );
+	}
+
+	@Test
+	@DisplayName( "Get all VM interface devices from libvirt XML file" )
+	public void testGetInterfaceDevices()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 1, vm.getInterfaceDevices().size() );
+	}
+
+	@Test
+	@DisplayName( "Get all VM graphic devices from libvirt XML file" )
+	public void testGetGraphicDevices()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 1, vm.getGraphicDevices().size() );
+	}
+
+	@Test
+	@DisplayName( "Get all VM sound devices from libvirt XML file" )
+	public void testGetSoundDevices()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 1, vm.getSoundDevices().size() );
+	}
+
+	@Test
+	@DisplayName( "Get all VM video devices from libvirt XML file" )
+	public void testGetVideoDevices()
+	{
+		Domain vm = this.newDomainInstance( "qemu-kvm_default-ubuntu-20-04-vm.xml" );
+		assertEquals( 1, vm.getVideoDevices().size() );
+	}
+}