|
|
package org.openslx.util.vm;
import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Map;
import java.util.TreeMap;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.apache.log4j.Logger;
import org.apache.log4j.varia.StringMatchFilter;
import org.openslx.util.vm.VmwareConfig.ConfigEntry;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.openslx.util.vm.VmMetaData.DriveBusType;
import org.openslx.util.vm.VmMetaData.HardDisk;
public class VboxConfig
{
private static final Logger LOGGER = Logger.getLogger( VboxConfig.class );
XPath xPath = XPathFactory.newInstance().newXPath();
private Document doc = null;
private String displayNameExpression = "/VirtualBox/Machine/@name";
private String displayName;
private String osTypeExpression = "/VirtualBox/Machine/@OSType";
private String osName = new String();;
private String hddsExpression = "/VirtualBox/Machine/MediaRegistry/HardDisks/*";
private ArrayList<HardDisk> hddsArray;
// a black list of sorts of tags that need to be removed from the .vbox file
private static String[] blackList = {"ExtraData"};
public VboxConfig ( File file ) throws IOException, UnsupportedVirtualizerFormatException {
try {
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
doc = dBuilder.parse( file );
// TODO - does this test suffice??
if ( !doc.getDocumentElement().getNodeName().equals( "VirtualBox" ) ) {
throw new UnsupportedVirtualizerFormatException( "not VirtualBox image format" );
}
} catch ( ParserConfigurationException | SAXException | IOException e ) {
LOGGER.debug( "Could not parse .Vbox", e );
throw new UnsupportedVirtualizerFormatException( "Konnte VBoxConfig nicht erstellen!" );
}
displayName = new String();
hddsArray = new ArrayList<HardDisk>();
}
// returns definition document
public Document getConfigDoc() {
return doc;
}
// initialization function
public void init(){
try {
setMachineName();
setOsType();
setHdds();
removeBlackListedTags();
} catch ( XPathExpressionException e ) {
LOGGER.debug( "Konnte VBoxConfig nicht initializieren", e );
return;
}
}
public void setMachineName() throws XPathExpressionException
{
String name = xPath.compile( displayNameExpression ).evaluate( this.doc );
if ( !name.isEmpty() ) {
displayName = name;
}
}
public void setOsType() throws XPathExpressionException
{
String os = xPath.compile( osTypeExpression ).evaluate( this.doc );
if ( !os.isEmpty() ) {
LOGGER.debug( os);
osName = os;
}
}
public void setHdds() throws XPathExpressionException
{
XPathExpression hddsExpr = xPath.compile( hddsExpression );
Object result = hddsExpr.evaluate( this.doc , XPathConstants.NODESET );
// take all the hdd nodes
NodeList nodes = (NodeList) result;
// TODO find all HardDisk under HardDisks, give them to the hdds
// foreach hdd in the hddnodes do:
for ( int i = 0; i < nodes.getLength(); i++) {
// have the node
// take the uuid
// look under <AttachedDevice if found and do stuff with it
Element hddElement = (Element) nodes.item(i);
// read the filePath
String fileName = hddElement.getAttribute( "location" );
// take the uuid
String uuid = hddElement.getAttribute( "uuid" );
// do the loop the loop
// search in the xml thingy and give back the parent of the parent of the node that is called Image and hast the given uuid
String pathToParent = givePathToStorageController( uuid );
XPathExpression attachedDevicesExpr = xPath.compile( pathToParent );
Object devicesResult = attachedDevicesExpr.evaluate( this.doc , XPathConstants.NODESET );
NodeList devicesNodes = (NodeList) devicesResult;
// TODO -- ehm...should only have 1 element...what do when there are more?
if ( devicesNodes.getLength() > 1 ) return;
Element deviceElement = (Element) devicesNodes.item( 0 );
String controllerDevice = deviceElement.getAttribute( "type" );
String bus = deviceElement.getAttribute( "name" );
DriveBusType busType = null;
if ( bus.equals( "IDE" ) ) {
busType = DriveBusType.IDE;
} else if ( bus.equals( "SCSI" ) ) {
busType = DriveBusType.SCSI;
} else if ( bus.equals( "SATA" ) ) {
busType = DriveBusType.SATA;
}
// add them together
hddsArray.add( new HardDisk( controllerDevice, busType, fileName ) );
}
}
public void changeAttribute(String targetTag, String attribute, String newValue)
{
changeAttribute(targetTag, attribute, newValue, null, null);
}
public void changeAttribute(String targetTag, String targetAttr, String newValue, String refAttr, String refVal)
{
String path = ".//"+targetTag;
XPathExpression expr;
NodeList nodes = null;
try {
expr = xPath.compile( path );
Object nodesObject = expr.evaluate( this.doc , XPathConstants.NODESET );
nodes = (NodeList) nodesObject;
} catch ( XPathExpressionException e ) {
e.printStackTrace();
}
for ( int i = 0; i < nodes.getLength(); i++)
{
Element element = (Element) nodes.item(i);
if (refAttr != null && refVal != null)
{
if (element.getAttribute( refAttr ).equals( refVal ))
{
element.setAttribute( targetAttr, newValue );
break;
}
}
else
{
if ( nodes.getLength() > 1)
{
LOGGER.warn( "Aktion würde an mehreren Knotten die Value ändern; unterbrochen!" );
return;
}
LOGGER.debug( element.toString() );
element.setAttribute( targetAttr, newValue );
}
}
}
// cleanup part here
private void removeBlackListedTags() throws XPathExpressionException
{
// iterate over the blackList
for ( String blackedTag : blackList ) {
String blackedExpression = ".//"+blackedTag;
XPathExpression blackedExpr = xPath.compile( blackedExpression );
Object blackedResult = blackedExpr.evaluate( this.doc , XPathConstants.NODESET );
NodeList blackedNodes = (NodeList) blackedResult;
for ( int i = 0; i < blackedNodes.getLength(); i++) {
Element blackedListedElement = (Element) blackedNodes.item(i);
blackedListedElement.getParentNode().removeChild( blackedListedElement );
}
}
}
private String givePathToStorageController( String uuid )
{
// StorageController is the parent of the parent of node with given uuid
return "//Image[contains(@uuid, \'"+uuid+"\')]/../..";
}
public String getDisplayName()
{
return displayName;
}
public String getOsName()
{
return osName;
}
public ArrayList<HardDisk> getHdds()
{
return hddsArray;
}
public String toString()
{
try {
StringWriter sw = new StringWriter();
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.transform(new DOMSource(doc), new StreamResult(sw));
return sw.toString();
} catch (Exception ex) {
throw new RuntimeException("Error converting to String", ex);
}
}
}
|
