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   *   Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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   ****************************************************************/
  package org.apache.cayenne.swing.components.tree;
  
  import javax.swing.tree.DefaultMutableTreeNode;
  import javax.swing.tree.DefaultTreeModel;
  import javax.swing.tree.TreeNode;
  import javax.swing.tree.TreePath;
  import java.util.Objects;
  
  /**
   * @since 5.0
   */
  public class ChangeOptimizingTreeModel extends DefaultTreeModel {
  
      public ChangeOptimizingTreeModel(TreeNode root) {
          super(root);
      }
  
      public ChangeOptimizingTreeModel(TreeNode root, boolean asksAllowsChildren) {
          super(root, asksAllowsChildren);
      }
  
      @Override
      public void valueForPathChanged(TreePath path, Object newValue) {
          if (path.getLastPathComponent() instanceof DefaultMutableTreeNode) {
              Object value = ((DefaultMutableTreeNode) path.getLastPathComponent()).getUserObject();
              if (!Objects.equals(value, newValue)) {
                  super.valueForPathChanged(path, newValue);
              }
          } else {
              super.valueForPathChanged(path, newValue);
          }
      }
  }
  