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'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * Licensed 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
 * http://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 KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.rapiddweller.common.ui.swing;

import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.TreeModel;
import java.util.ArrayList;
import java.util.List;

/**
 * Provides handling for {@link TreeModelListener}s.
 * Created: 22.08.2012 17:13:08
 *
 * @author Volker Bergmann
 * @since 0.5.18
 */
public abstract class AbstractTreeModel implements TreeModel {

  private final List listeners;

  /**
   * Instantiates a new Abstract tree model.
   */
  public AbstractTreeModel() {
    this.listeners = new ArrayList<>();
  }

  @Override
  public void addTreeModelListener(TreeModelListener listener) {
    listeners.add(listener);
  }

  @Override
  public void removeTreeModelListener(TreeModelListener listener) {
    listeners.remove(listener);
  }

  /**
   * Fire tree structure changed.
   *
   * @param source the source
   * @param path   the path
   */
  protected void fireTreeStructureChanged(Object source, Object[] path) {
    TreeModelEvent event = new TreeModelEvent(source, path);
    for (int i = listeners.size() - 1; i >= 0; i--) {
      listeners.get(i).treeStructureChanged(event);
    }
  }

  /**
   * Fire tree nodes changed.
   *
   * @param source       the source
   * @param path         the path
   * @param childIndices the child indices
   * @param children     the children
   */
  protected void fireTreeNodesChanged(Object source, Object[] path, int[] childIndices, Object[] children) {
    TreeModelEvent event = new TreeModelEvent(source, path, childIndices, children);
    for (int i = listeners.size() - 1; i >= 0; i--) {
      listeners.get(i).treeNodesChanged(event);
    }
  }

  /**
   * Fire tree nodes inserted.
   *
   * @param source       the source
   * @param path         the path
   * @param childIndices the child indices
   * @param children     the children
   */
  protected void fireTreeNodesInserted(Object source, Object[] path, int[] childIndices, Object[] children) {
    TreeModelEvent e = new TreeModelEvent(source, path, childIndices, children);
    for (int i = listeners.size() - 1; i >= 0; i--) {
      listeners.get(i).treeNodesInserted(e);
    }
  }

  /**
   * Fire tree nodes removed.
   *
   * @param source       the source
   * @param path         the path
   * @param childIndices the child indices
   * @param children     the children
   */
  protected void fireTreeNodesRemoved(Object source, Object[] path, int[] childIndices, Object[] children) {
    TreeModelEvent e = new TreeModelEvent(source, path, childIndices, children);
    for (int i = listeners.size() - 1; i >= 0; i--) {
      listeners.get(i).treeNodesRemoved(e);
    }
  }

}