Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (c) 2008 Oracle Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Oracle Corporation - initial API and implementation
 */

import org.w3c.dom.Node;

public class Main {
    private static final String KEY_CURRENT_CHILD_INDEX = "KEY_CURRENT_CHILD_INDEX";

    /**
     * Sets the index of the Node instance's "current" child as user data on
     * the Node instance.
     * 
     * @param node Node instance on which to set index.
     * @param index Index of node's "current" child.
     * @return true if index has changed, else false.
     */
    public static boolean setCurrentChildIndex(Node node, int index) {
        boolean indexChanged = false;
        if (node != null) {
            int currentIndex = getCurrentChildIndex(node);
            if (currentIndex != index) {
                node.setUserData(KEY_CURRENT_CHILD_INDEX, new Integer(index), null);
                indexChanged = true;
            }
        }
        return indexChanged;
    }

    /**
     * Gets the index of the Node instance's "current" child from user data on
     * the Node instance.
     * 
     * @param node Node instance from which to get index.
     * @return Index of node's "current" child. A value of -1 indicates
     * inability to get index from node.
     */
    public static int getCurrentChildIndex(Node node) {
        int index = -1;
        if (node != null) {
            Object obj = node.getUserData(KEY_CURRENT_CHILD_INDEX);
            if (obj instanceof Integer) {
                index = ((Integer) obj).intValue();
            }
        }
        return index;
    }
}