1 files changed, 108 insertions, 0 deletions
diff --git a/src/main/java/org/openslx/virtualization/configuration/logic/ConfigurationLogicDozModServerToStatelessClient.java b/src/main/java/org/openslx/virtualization/configuration/logic/ConfigurationLogicDozModServerToStatelessClient.java
new file mode 100644
index 0000000..2d3e861
--- /dev/null
+++ b/src/main/java/org/openslx/virtualization/configuration/logic/ConfigurationLogicDozModServerToStatelessClient.java
@@ -0,0 +1,108 @@
+package org.openslx.virtualization.configuration.logic;
+
+import org.openslx.virtualization.configuration.VirtualizationConfiguration;
+import org.openslx.virtualization.configuration.VirtualizationConfiguration.EtherType;
+import org.openslx.virtualization.configuration.VirtualizationConfigurationException;
+import org.openslx.virtualization.configuration.data.ConfigurationDataDozModServerToStatelessClient;
+import org.openslx.virtualization.configuration.transformation.TransformationException;
+
+/**
+ * Transformation logic for virtualization configurations between a dozmod-server and a stateless
+ * client.
+ * <p>
+ * This transformation logic is applied while downloading an existing virtualization configuration
+ * from a dozmod-server to a stateless client.
+ * 
+ * <pre>
+ *   +------------------------------+  DozModServerToStatelessClient   +------------------------------+
+ *   | virtualization configuration | -------------------------------▶ | virtualization configuration |
+ *   +---------------+--------------+      transformation logic        +------------------+-----------+
+ *   | dozmod-server |                                                 | stateless client |
+ *   +---------------+                                                 +------------------+
+ * </pre>
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public class ConfigurationLogicDozModServerToStatelessClient
+		extends ConfigurationLogic<ConfigurationDataDozModServerToStatelessClient>
+{
+	/**
+	 * Name of the transformation logic for virtualization configurations.
+	 */
+	private static final String CONFIGURATION_LOGIC_NAME = "Transformation of virtualization configuration during download from DozMod server to stateless client";
+
+	/**
+	 * Default type for an ethernet interface in a virtualization configuration.
+	 */
+	private static final EtherType CONFIGURATION_DEFAULT_ETHERNET_TYPE = EtherType.NAT;
+
+	/**
+	 * Creates a new transformation logic for virtualization configurations between a dozmod-server
+	 * and a stateless client.
+	 */
+	public ConfigurationLogicDozModServerToStatelessClient()
+	{
+		super( ConfigurationLogicDozModServerToStatelessClient.CONFIGURATION_LOGIC_NAME );
+	}
+
+	/**
+	 * Validates a virtualization configuration and input arguments for a transformation.
+	 * 
+	 * @param config virtualization configuration for the validation.
+	 * @param args input arguments for the validation.
+	 * @throws TransformationException validation has failed.
+	 */
+	private void validateInputs( VirtualizationConfiguration config,
+			ConfigurationDataDozModServerToStatelessClient args )
+			throws TransformationException
+	{
+		if ( config == null || args == null ) {
+			throw new TransformationException( "Virtualization configuration or input arguments are missing!" );
+		} else if ( args.getDisplayName() == null || args.getDisplayName().isEmpty() ) {
+			throw new TransformationException( "Valid display name is not specified!" );
+		}
+	}
+
+	@Override
+	public void transform( VirtualizationConfiguration config,
+			ConfigurationDataDozModServerToStatelessClient args )
+			throws TransformationException
+	{
+		// check if input parameters for a transformation are valid
+		this.validateInputs( config, args );
+
+		// apply settings to run virtualized system in a stateless manner
+		try {
+			config.transformNonPersistent();
+		} catch ( VirtualizationConfigurationException e ) {
+			throw new TransformationException( e.getLocalizedMessage() );
+		}
+
+		// set display name of lecture
+		if ( !config.addDisplayName( args.getDisplayName() ) ) {
+			throw new TransformationException( "Can not set display name in virtualization configuration!" );
+		}
+
+		// append hard disk drive (with no referenced image as content)
+		if ( !config.addEmptyHddTemplate() ) {
+			throw new TransformationException( "Can not configure hard disk in virtualization configuration!" );
+		}
+
+		// append default NAT interface
+		if ( !config.addEthernet(
+				ConfigurationLogicDozModServerToStatelessClient.CONFIGURATION_DEFAULT_ETHERNET_TYPE ) ) {
+			throw new TransformationException( "Can not configure NAT interface in virtualization configuration!" );
+		}
+
+		// set the guest OS if specified
+		if ( args.getOsId() != null ) {
+			config.setOs( args.getOsId() );
+		}
+
+		// disable USB if necessary
+		if ( !args.hasUsbAccess() ) {
+			config.disableUsb();
+		}
+	}
+}