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package org.openslx.libvirt.libosinfo;
import java.io.File;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.function.Predicate;
import org.openslx.libvirt.libosinfo.os.Os;
import org.openslx.libvirt.xml.LibvirtXmlDocument;
import org.openslx.libvirt.xml.LibvirtXmlDocumentException;
import org.openslx.libvirt.xml.LibvirtXmlNode;
import org.openslx.libvirt.xml.LibvirtXmlResources;
import org.openslx.libvirt.xml.LibvirtXmlSerializationException;
import org.openslx.libvirt.xml.LibvirtXmlValidationException;
import org.openslx.virtualization.Version;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
/**
* Implementation of a libosinfo XML document.
*
* The libosinfo XML document is used to describe existing operating systems, devices and their
* configuration possibilities.
*
* @author Manuel Bentele
* @version 1.0
*/
public class LibOsInfo extends LibvirtXmlDocument
{
/**
* Creates a libosinfo XML document from a {@link String} providing libosinfo XML content.
*
* @param xml {@link String} with libosinfo XML content.
*
* @throws LibvirtXmlDocumentException creation of XML context failed.
* @throws LibvirtXmlSerializationException serialization of the libosinfo XML content failed.
* @throws LibvirtXmlValidationException XML content is not a valid libosinfo XML document.
*/
public LibOsInfo( String xml )
throws LibvirtXmlDocumentException, LibvirtXmlSerializationException, LibvirtXmlValidationException
{
super( xml, LibvirtXmlResources.getLibOsInfoRng( "osinfo.rng" ) );
}
/**
* Creates a libosinfo XML document from a {@link File} containing libosinfo XML content.
*
* @param xml existing {@link File} containing libosinfo XML content.
*
* @throws LibvirtXmlDocumentException creation of XML context failed.
* @throws LibvirtXmlSerializationException serialization of the libosinfo XML content failed.
* @throws LibvirtXmlValidationException XML content is not a valid libosinfo XML document.
*/
public LibOsInfo( File xml )
throws LibvirtXmlDocumentException, LibvirtXmlSerializationException, LibvirtXmlValidationException
{
super( xml, LibvirtXmlResources.getLibOsInfoRng( "osinfo.rng" ) );
}
/**
* Creates a libosinfo XML document from an {@link InputStream} providing libosinfo XML content.
*
* @param xml {@link InputStream} providing libosinfo XML content.
*
* @throws LibvirtXmlDocumentException creation of XML context failed.
* @throws LibvirtXmlSerializationException serialization of the libosinfo XML content failed.
* @throws LibvirtXmlValidationException XML content is not a valid libosinfo XML document.
*/
public LibOsInfo( InputStream xml )
throws LibvirtXmlDocumentException, LibvirtXmlSerializationException, LibvirtXmlValidationException
{
super( xml, LibvirtXmlResources.getLibOsInfoRng( "osinfo.rng" ) );
}
/**
* Creates libosinfo XML document from {@link InputSource} providing libosinfo XML content.
*
* @param xml {@link InputSource} providing libosinfo XML content.
*
* @throws LibvirtXmlDocumentException creation of XML context failed.
* @throws LibvirtXmlSerializationException serialization of the libosinfo XML content failed.
* @throws LibvirtXmlValidationException XML content is not a valid libosinfo XML document.
*/
public LibOsInfo( InputSource xml )
throws LibvirtXmlDocumentException, LibvirtXmlSerializationException, LibvirtXmlValidationException
{
super( xml, LibvirtXmlResources.getLibOsInfoRng( "osinfo.rng" ) );
}
/**
* Returns the version of the libosinfo database.
*
* @return version of the libosinfo database.
*/
public Version getVersion()
{
final String version = this.getRootXmlNode().getXmlElementAttributeValue( "version" );
return Version.valueOf( version );
}
/**
* Returns a list of all defined operating systems.
*
* @return list of all defined operating systems.
*/
public ArrayList<Os> getOses()
{
final ArrayList<Os> oses = new ArrayList<Os>();
final NodeList osNodes = this.getRootXmlNode().getXmlNodes( "os" );
if ( osNodes != null ) {
for ( int i = 0; i < osNodes.getLength(); i++ ) {
final Node childNode = osNodes.item( i );
if ( childNode.getNodeType() == Node.ELEMENT_NODE ) {
final LibvirtXmlNode osNode = new LibvirtXmlNode( this.getRootXmlNode().getXmlDocument(), childNode );
final Os os = Os.newInstance( osNode );
if ( os != null ) {
oses.add( os );
}
}
}
}
return oses;
}
/**
* Lookups an operating system in the libosinfo database specified by the operating system
* identifier.
*
* @param osId identifier of the operating system to lookup in the libosinfo database.
* @return found operating system from the libosinfo database.
*/
public static Os lookupOs( String osId )
{
Os os = null;
if ( osId != null && !osId.isEmpty() ) {
ArrayList<Os> oses = null;
try {
final LibOsInfo osInfo = new LibOsInfo( LibvirtXmlResources.getLibOsInfoXml( "osinfo.xml" ) );
oses = osInfo.getOses();
} catch ( LibvirtXmlDocumentException | LibvirtXmlSerializationException | LibvirtXmlValidationException e ) {
oses = null;
}
if ( oses != null ) {
final Predicate<Os> byOsId = osCandidate -> osId.equals( osCandidate.getId() );
os = oses.stream().filter( byOsId ).findFirst().orElse( null );
}
}
return os;
}
}
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