[emf-dev] EMF Compare for Java Packages

[Roberto Minelli <roby88@xxxxxxxxxx>]

Dear All,
I'm developing an Eclipse Plug-in that needs to be able to compute the diff between Java Source files as well as Java Packages, as "Compare with Each other" Eclipse's functionality does.
Can EMF Compare help me? I installed in Eclipse all the materials as well as downloaded all the CVS projects via the *.psf file but I'm not able to use it as I want to.
I already take a look at the Stand-Alone project, as suggested in many threads, but it does not help since I reported errors while using it.

Loading resources.

org.eclipse.emf.ecore.resource.Resource$IOWrappedException: Content is not allowed in prolog.
	at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:201)
	at org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doLoad(XMLResourceImpl.java:180)
	at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1494)
	at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1282)
	at org.eclipse.emf.compare.util.ModelUtils.load(ModelUtils.java:320)
	at org.eclipse.emf.compare.util.ModelUtils.load(ModelUtils.java:218)
	at ExampleLauncher.main(ExampleLauncher.java:64)
Caused by: org.xml.sax.SAXParseException: Content is not allowed in prolog.
	at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
	at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174)
	at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
	at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1414)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:1039)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
	at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
	at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:181)
	... 6 more


Can someone, please, provide me a snippet of code that can help me comparing two Java Packages?

Best regards and thank in advance,
Roberto M.