001/*
002 * Copyright (C) 2009-2011 Mathias Doenitz
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.parboiled.trees;
018
019/**
020 * A simple {@link MutableBinaryTreeNode} implementation based on the {@link MutableTreeNodeImpl}.
021 *
022 * @param <T> the actual implementation type of this MutableBinaryTreeNodeImpl
023 */
024public class MutableBinaryTreeNodeImpl<T extends MutableBinaryTreeNode<T>> extends MutableTreeNodeImpl<T>
025        implements BinaryTreeNode<T> {
026
027    public MutableBinaryTreeNodeImpl() {
028        super.addChild(0, null); // left
029        super.addChild(1, null); // right
030    }
031
032    public T left() {
033        return getChildren().get(0);
034    }
035
036    public void setLeft(T node) {
037        setChild(0, node);
038    }
039
040    public T right() {
041        return getChildren().get(1);
042    }
043
044    public void setRight(T node) {
045        setChild(1, node);
046    }
047
048    @Override
049    public void addChild(int index, T child) {
050        throw new UnsupportedOperationException();
051    }
052
053    @Override
054    public T removeChild(int index) {
055        throw new UnsupportedOperationException();
056    }
057
058}