Bug 18067 Packages View filters not applied when eclipse restarted
Eclipse F1 1) Create a java project with a .classpath file 2) In the packages view open the filter dialog and uncheck "Hide .* files". 3) Notice that the .classpath file is visible 4) Exit eclipse 5) Launch eclipse again. 6) Notice that the .classpath file is not visible in the packages view 7) Open the filter dialog for the Packages view. Notice that "Hide .* files" is still unchecked.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/MembersView.java
if (je instanceof IMember)
					return findInputForJavaElement(((IMember)je).getDeclaringType());
		}
		return null; 	
	}
	
	/*
	 * Implements method from IViewPart.
	 */
	public void saveState(IMemento memento) {
		super.saveState(memento);
		fMemberFilterActionGroup.saveState(memento);
	}	
	protected void restoreState(IMemento memento) {
		super.restoreState(memento);
		fMemberFilterActionGroup.restoreState(memento, true);
	}	
	protected void hookViewerListeners() {
		super.hookViewerListeners();
		getViewer().addDoubleClickListener(new IDoubleClickListener() {
			public void doubleClick(DoubleClickEvent event) {
				TreeViewer viewer= (TreeViewer)getViewer();
				Object element= ((IStructuredSelection)event.getSelection()).getFirstElement();
				if (viewer.isExpandable(element))
					viewer.setExpandedState(element, !viewer.getExpandedState(element));
			}
		});
	}
}