2362N/A * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 0N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2362N/A * or visit www.oracle.com if you need additional information or have any 0N/A * The model used by <code>JTree</code>. 0N/A * <code>JTree</code> and its related classes make extensive use of 0N/A * <code>TreePath</code>s for indentifying nodes in the <code>TreeModel</code>. 0N/A * If a <code>TreeModel</code> returns the same object, as compared by 0N/A * <code>equals</code>, at two different indices under the same parent 0N/A * than the resulting <code>TreePath</code> objects will be considered equal 0N/A * as well. Some implementations may assume that if two 0N/A * <code>TreePath</code>s are equal, they identify the same node. If this 0N/A * condition is not met, painting problems and other oddities may result. 0N/A * In other words, if <code>getChild</code> for a given parent returns 0N/A * the same Object (as determined by <code>equals</code>) problems may 0N/A * result, and it is recommended you avoid doing this. 0N/A * Similarly <code>JTree</code> and its related classes place 0N/A * <code>TreePath</code>s in <code>Map</code>s. As such if 0N/A * a node is requested twice, the return values must be equal 0N/A * (using the <code>equals</code> method) and have the same 0N/A * <code>hashCode</code>. 0N/A * For further information on tree models, 0N/A * including an example of a custom implementation, 0N/A * in <em>The Java Tutorial.</em> 0N/A * Returns the root of the tree. Returns <code>null</code> 0N/A * only if the tree has no nodes. 0N/A * @return the root of the tree 0N/A * Returns the child of <code>parent</code> at index <code>index</code> 0N/A * child array. <code>parent</code> must be a node previously obtained 0N/A * from this data source. This should not return <code>null</code> 0N/A * if <code>index</code> 0N/A * is a valid index for <code>parent</code> (that is <code>index >= 0 && 0N/A * index < getChildCount(parent</code>)). 0N/A * @param parent a node in the tree, obtained from this data source 0N/A * @return the child of <code>parent</code> at index <code>index</code> 0N/A * Returns the number of children of <code>parent</code>. 0N/A * Returns 0 if the node 0N/A * is a leaf or if it has no children. <code>parent</code> must be a node 0N/A * previously obtained from this data source. 0N/A * @param parent a node in the tree, obtained from this data source 0N/A * @return the number of children of the node <code>parent</code> 0N/A * Returns <code>true</code> if <code>node</code> is a leaf. 0N/A * It is possible for this method to return <code>false</code> 0N/A * even if <code>node</code> has no children. 0N/A * A directory in a filesystem, for example, 0N/A * may contain no files; the node representing 0N/A * the directory is not a leaf, but it also has no children. 0N/A * @param node a node in the tree, obtained from this data source 0N/A * @return true if <code>node</code> is a leaf 0N/A * Messaged when the user has altered the value for the item identified 0N/A * by <code>path</code> to <code>newValue</code>. 0N/A * If <code>newValue</code> signifies a truly new value 0N/A * the model should post a <code>treeNodesChanged</code> event. 0N/A * @param path path to the node that the user has altered 0N/A * @param newValue the new value from the TreeCellEditor 0N/A * Returns the index of child in parent. If either <code>parent</code> 0N/A * or <code>child</code> is <code>null</code>, returns -1. 0N/A * If either <code>parent</code> or <code>child</code> don't 0N/A * belong to this tree model, returns -1. 0N/A * @param parent a node in the tree, obtained from this data source 0N/A * @param child the node we are interested in 0N/A * @return the index of the child in the parent, or -1 if either 0N/A * <code>child</code> or <code>parent</code> are <code>null</code> 0N/A * or don't belong to this tree model 0N/A * Adds a listener for the <code>TreeModelEvent</code> 0N/A * posted after the tree changes. 0N/A * @param l the listener to add 0N/A * @see #removeTreeModelListener 0N/A * Removes a listener previously added with 0N/A * <code>addTreeModelListener</code>. 0N/A * @see #addTreeModelListener 0N/A * @param l the listener to remove