001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.messageboards.model;
016    
017    import java.io.Serializable;
018    
019    import java.util.List;
020    
021    /**
022     * @author Brian Wing Shun Chan
023     */
024    public interface MBTreeWalker extends Serializable {
025    
026            public List<MBMessage> getChildren(MBMessage message);
027    
028            public int[] getChildrenRange(MBMessage message);
029    
030            public List<MBMessage> getMessages();
031    
032            public MBMessage getRoot();
033    
034            public boolean isLeaf(MBMessage message);
035    
036            public boolean isOdd();
037    
038    }