001    /*
002     * Copyright 2002-2004 the original author or authors.
003     * 
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not
005     * use this file except in compliance with the License. You may obtain a copy of
006     * the License at
007     * 
008     * http://www.apache.org/licenses/LICENSE-2.0
009     * 
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
012     * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
013     * License for the specific language governing permissions and limitations under
014     * the License.
015     */
016    package org.springframework.richclient.tree;
017    
018    import java.util.Collection;
019    
020    import org.springframework.richclient.core.DescribedElement;
021    
022    /**
023     * A interface to be implemented by any object participating in a hierarchical
024     * tree structure. For example, business objects that were linked via a graph of
025     * references may implement this interface to allow for traversing the graph by
026     * a client such as a user interface application.
027     * 
028     * @author Keith Donald
029     */
030    public interface TreeObject extends DescribedElement {
031        public TreeObject getParent();
032    
033        public Collection getChildren();
034    
035        public int getChildCount();
036    }