Java tutorial
//package com.java2s; /* * Copyright 2010, 2011 Institut Pasteur. * * This file is part of ICY. * * ICY 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 3 of the License, or * (at your option) any later version. * * ICY 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 ICY. If not, see <http://www.gnu.org/licenses/>. */ import org.w3c.dom.Document; import org.w3c.dom.Element; public class Main { public static final String NODE_ROOT_NAME = "root"; /** * Return the root element for specified document<br> * Create if it does not already exist with the specified name */ private static Element getRootElement(Document doc, boolean create, String name) { if (doc != null) { Element result = doc.getDocumentElement(); if ((result == null) && create) { result = doc.createElement(name); doc.appendChild(result); } return result; } return null; } /** * Return the root element for specified document<br> * Create if it does not already exist with the default {@link #NODE_ROOT_NAME} */ public static Element getRootElement(Document doc, boolean create) { return getRootElement(doc, create, NODE_ROOT_NAME); } /** * Return the root element for specified document (null if not found)<br> */ public static Element getRootElement(Document doc) { return getRootElement(doc, false); } }