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
fJavaDocField.setButtonLabel(NewWizardMessages.getString("SourceAttachmentBlock.javadoc.button"));		 
		
		
		setDefaults();
	}
	
	public void setDefaults() {
		if (fOldEntry != null && fOldEntry.getSourceAttachmentPath() != null) {
			fFileNameField.setText(fOldEntry.getSourceAttachmentPath().toString());
		} else {
			fFileNameField.setText(""); 
		}	
				
		if (fOldEntry != null && fOldEntry.getSourceAttachmentRootPath() != null) {
			fPrefixField.setText(fOldEntry.getSourceAttachmentRootPath().toString());
		} else {
			fPrefixField.setText(""); 
		}
	}
	
	/**
	 * Gets the source attachment path chosen by the user
	 */
	public IPath getSourceAttachmentPath() {
		if (fFileNameField.getText().length() == 0) {
			return null;
		}
		return new Path(fFileNameField.getText());
	}
	/**