00001 /* 00002 * (c) copyright 2008, Technische Universitaet Graz and Technische Universitaet Wien 00003 * 00004 * This file is part of jdiagengine. 00005 * 00006 * jdiagengine is free software: you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation, either version 3 of the License, or 00009 * (at your option) any later version. 00010 * 00011 * jdiagengine is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * You should have received a copy of the GNU General Public License 00016 * along with jdiagengine. If not, see <http://www.gnu.org/licenses/>. 00017 * 00018 * Authors: Joerg Weber, Franz Wotawa 00019 * Contact: jweber@ist.tugraz.at (preferred), or fwotawa@ist.tugraz.at 00020 * 00021 */ 00022 00023 00024 package utils; 00025 00026 import java.util.*; 00027 00028 abstract public class DoubleLinkedTreeVisitor { 00029 00030 /* 00031 * Returns true iff the Visitor wants to visit more nodes. 00032 * 00033 * This method must return true before the first call to visit(). 00034 */ 00035 public boolean wantMoreNodes() { 00036 return true; 00037 } 00038 00039 /* 00040 * Visits a node. 00041 */ 00042 abstract public void visit(DoubleLinkedTreeNode node); 00043 00044 }