001 /* 002 Copyright (C) 2004 Laurent Martelli <laurent@aopsys.com> 003 004 This program is free software; you can redistribute it and/or modify 005 it under the terms of the GNU Lesser General Public License as 006 published by the Free Software Foundation; either version 2 of the 007 License, or (at your option) any later version. 008 009 This program is distributed in the hope that it will be useful, but 010 WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 Lesser General Public License for more details. 013 014 You should have received a copy of the GNU Lesser General Public 015 License along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 017 USA */ 018 019 package org.objectweb.jac.aspects.gui; 020 021 /** 022 * Useful methods that operate on views. 023 */ 024 public class Views { 025 026 /** 027 * Finds a parent view with a given type 028 * 029 * @param start the view whose parents to search for 030 * @param parentClass the type of the requested parent class 031 * @return a parent view of start whose type is parentClass, or 032 * null if no such view can be found 033 */ 034 public static View findParent(View start, Class parentClass) { 035 if (parentClass.isAssignableFrom(start.getClass())) 036 return start; 037 else if (start.getParentView()==null) 038 return null; 039 else 040 return findParent(start.getParentView(),parentClass); 041 } 042 }