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
try {
				ZipFile zipFile= new ZipFile(fResolvedFile);			
				ZipContentProvider contentProvider= new ZipContentProvider();
				contentProvider.setInitialInput(zipFile);
				ElementTreeSelectionDialog dialog= new ElementTreeSelectionDialog(getShell(), new ZipLabelProvider(), contentProvider); 
				dialog.setAllowMultiple(false);
				dialog.setTitle(NewWizardMessages.getString("SourceAttachmentBlock.prefixdialog.title")); 
				dialog.setMessage(NewWizardMessages.getString("SourceAttachmentBlock.prefixdialog.message")); 
				dialog.setInput(zipFile);
				dialog.setInitialSelection(contentProvider.getSelectedNode(initSelection));
				if (dialog.open() == dialog.OK) {
					Object obj= dialog.getFirstResult();
					IPath path= new Path(obj.toString());
					if (fIsVariableEntry) {
						path= modifyPath(path, currPath.segment(0));
					}
					return path;
				}
			} catch (IOException e) {
				String title= NewWizardMessages.getString("SourceAttachmentBlock.prefixdialog.error.title"); 
				String message= NewWizardMessages.getFormattedString("SourceAttachmentBlock.prefixdialog.error.message", fResolvedFile.getPath()); 
				MessageDialog.openError(getShell(), title, message);
				JavaPlugin.log(e);
			}				
		
		}
		return null;
	}
	
	/*