Bug 6672 jar no longer exported after attach source
1206 1. Create a project test. 2. Add a jar (say resources.jar) to the classpath and export the entry 3. Attach source (say resourcessrc.zip) to the jar. Notice, the jar is no longer exported - this information is discarded during the attach source process.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceAttachmentBlock.java
private IWorkspaceRoot fRoot;
	
	private Control fSWTWidget;
	private CLabel fFullPathResolvedLabel;
	private CLabel fPrefixResolvedLabel;
	
	private IClasspathEntry fOldEntry;
	
	public SourceAttachmentBlock(IWorkspaceRoot root, IStatusChangeListener context, IClasspathEntry oldEntry) {
		fContext= context;
				
		fRoot= root;
		fOldEntry= oldEntry;
		
		
		fIsVariableEntry= (oldEntry.getEntryKind() == IClasspathEntry.CPE_VARIABLE);
		
		fNameStatus= new StatusInfo();
		fPrefixStatus= new StatusInfo();
		fJavaDocStatus= new StatusInfo();		
		
		fJARPath= (oldEntry != null) ? oldEntry.getPath() : Path.EMPTY;
		
		SourceAttachmentAdapter adapter= new SourceAttachmentAdapter();
		
		
		if (fIsVariableEntry) {
			fFileNameField= new VariablePathDialogField(adapter);
			fFileNameField.setDialogFieldListener(adapter);