org.smallmind.swing.file.DirectoryNode Maven / Gradle / Ivy

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/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
 * 
 * This file is part of the SmallMind Code Project.
 * 
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 * 
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 * 
 * ...or...
 * 
 * 2) The terms of the Apache License, Version 2.0.
 * 
 * The SmallMind Code Project is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License or Apache License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 * 
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.swing.file;

import java.util.Comparator;
import java.util.Enumeration;
import org.smallmind.nutsnbolts.util.TreeNode;

public class DirectoryNode extends TreeNode {

  private boolean instantiated = false;

  public DirectoryNode (Directory directory) {

    super(directory, directory.hasChildren());
  }

  private synchronized void instantiateChildren () {

    Directory[] childDirectories;

    if (!instantiated) {
      instantiated = true;

      if (getAllowsChildren()) {
        childDirectories = ((Directory)getUserObject()).getChildren();
        for (Directory childDirectory : childDirectories) {
          add(new DirectoryNode(childDirectory));
        }
      }
    }
  }

  public Enumeration children () {

    instantiateChildren();

    return super.children();
  }

  public javax.swing.tree.TreeNode getChildAt (int childIndex) {

    instantiateChildren();

    return super.getChildAt(childIndex);
  }

  public int getChildCount () {

    instantiateChildren();

    return super.getChildCount();
  }

  public int getIndex (javax.swing.tree.TreeNode node) {

    instantiateChildren();

    return super.getIndex(node);
  }

  public void sortChildren (Comparator sort) {

    instantiateChildren();

    super.sortChildren(sort);
  }

}