Bug 15301 'show in packages view' - does not work fo java files not in source folders
20020502 open a java file that is in a resource folder (so it is not an ICompilationUnit - just a file with .java extension) 'show in packages view' is present in the context menu but it does nothing
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/ShowInPackageViewAction.java
private JavaEditor fEditor;
	
	/**
	 * Creates a new <code>ShowInPackageViewAction</code>.
	 * 
	 * @param site the site providing context information for this action
	 */
	public ShowInPackageViewAction(IWorkbenchSite site) {
		super(site);
		setText(ActionMessages.getString("ShowInPackageViewAction.label")); 
		setDescription(ActionMessages.getString("ShowInPackageViewAction.description")); 
		setToolTipText(ActionMessages.getString("ShowInPackageViewAction.tooltip")); 
		WorkbenchHelp.setHelp(this, IJavaHelpContextIds.SHOW_IN_PACKAGEVIEW_ACTION);	
	}
	
	/**
	 * Creates a new <code>ShowInPackageViewAction</code>.
	 * <p>