Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (c) 2007-2008. MB Software Vancouver, Canada. All Rights Reserved.
 * This software is published under the GPL GNU General Public License. 
 * This program 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.
 *  
 * This program 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 this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
 * 
 * This software was written for 
 * MB Software, margaritabowl.com
 * Vancouver, B.C., Canada 
 */

import java.util.ArrayList;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    public static void replaceChild(Document doc, Node parentNode, String childName, String childContents) {
        Node node = getChildNode(parentNode, childName);

        // if some one passes in null
        if (childContents == null) {
            // remove existing node
            if (node != null)
                parentNode.removeChild(node);

            return;
        }

        // this means there's at least contents pass in,
        if (node == null) {
            // no existing node, so we just add one
            appendChild(doc, parentNode, childName, childContents);
        } else {
            // existing node so we update it instead.
            node.setTextContent(childContents);
        }
    }

    /**
     * only returns the first instance of this child node
     * @param node
     * @param localName
     * @return
     */
    public static Node getChildNode(Node node, String name) {
        NodeList nodeList = node.getChildNodes();
        for (int i = 0; i < nodeList.getLength(); i++) {
            Node temp = nodeList.item(i);
            if (temp.getNodeType() != Node.ELEMENT_NODE)
                continue;
            if (name.equals(temp.getLocalName()) || name.equals(temp.getNodeName()))
                return (temp);
        }

        return (null);
    }

    public static void appendChild(Document doc, Node parentNode, String childName, String childContents) {
        if (childContents == null)
            throw (new NullPointerException("ChildNode is null."));

        Element child = doc.createElement(childName);
        child.setTextContent(childContents);
        parentNode.appendChild(child);
    }

    /**
     * @return a list of all child nodes with this name
     */
    public static ArrayList<Node> getChildNodes(Node node, String name) {
        ArrayList<Node> results = new ArrayList<Node>();

        NodeList nodeList = node.getChildNodes();
        for (int i = 0; i < nodeList.getLength(); i++) {
            Node temp = nodeList.item(i);
            if (temp.getNodeType() != Node.ELEMENT_NODE)
                continue;
            if (name.equals(temp.getLocalName()) || name.equals(temp.getNodeName())) {
                results.add(temp);
            }
        }

        return (results);
    }
}