Android Open Source - Todo Tree

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License

The source code is released under:

GNU General Public License

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Java Source Code

/**
 * This file is part of Todo.txt for Android, an app for managing your todo.txt file (http://todotxt.com).
 *//from  ww  w .  j  a  va  2 s.  co m
 * Copyright (c) 2009-2013 Todo.txt for Android contributors (http://todotxt.com)
 *
 * LICENSE:
 *
 * Todo.txt for Android is free software: you can redistribute it and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any
 * later version.
 *
 * Todo.txt for Android 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 for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with Todo.txt for Android. If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * Todo.txt for Android's source code is available at https://github.com/ginatrapani/todo.txt-android
 *
 * @author Todo.txt for Android contributors <todotxt@yahoogroups.com>
 * @license http://www.gnu.org/licenses/gpl.html
 * @copyright 2009-2013 Todo.txt for Android contributors (http://todotxt.com)
 */

package com.todotxt.todotxttouch.util;

import java.util.ArrayList;
import java.util.List;

public class Tree<E> {
  private Tree<E> parent = null;
  private List<Tree<E>> children = null;
  private E data;

  public Tree(E data) {
    this.data = data;
  }

  public Tree(Tree<E> parent, E data) {
    this.parent = parent;
    this.data = data;
  }

  public Tree<E> addChild(E data) {
    Tree<E> child = new Tree<E>(data);

    return addChild(child);
  }

  public Tree<E> addChild(Tree<E> child) {
    if (children == null) {
      children = new ArrayList<Tree<E>>();
    }

    children.add(child);
    child.parent = this;

    return child;
  }

  public Tree<E> getParent() {
    return parent;
  }

  public boolean isLoaded() {
    return children != null;
  }

  public void setLoaded() {
    if (children == null) {
      children = new ArrayList<Tree<E>>();
    }
  }

  public List<Tree<E>> getChildren() {
    return children;
  }

  public boolean contains(Tree<E> child) {
    if (children == null) {
      return false;
    }

    return children.contains(child);
  }

  public boolean contains(E data) {
    if (children == null) {
      return false;
    }

    for (Tree<E> child : children) {
      if (child.getData().equals(data)) {
        return true;
      }
    }

    return false;
  }

  public E getData() {
    return data;
  }

  public Tree<E> getChild(int position) {
    return children.get(position);
  }
}

Java Source Code List