Java XML Element Get getElement(Element e, String localName)

Description

get Element

License

Open Source License

Declaration

public static Element getElement(Element e, String localName) 

Method Source Code

//package com.java2s;
/*// w  ww  .j ava2s  . c  o  m
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

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

public class Main {
    public static Element getElement(Element e, String nsUri,
            String localName) {
        NodeList l = e.getChildNodes();
        for (int i = 0; i < l.getLength(); i++) {
            Node n = l.item(i);
            if (n.getNodeType() == Node.ELEMENT_NODE) {
                Element r = (Element) n;
                if (equals(r.getLocalName(), localName)
                        && equals(fixNull(r.getNamespaceURI()), nsUri))
                    return r;
            }
        }
        return null;
    }

    public static Element getElement(Element e, String localName) {
        return getElement(e, "", localName);
    }

    /**
     * Used for defensive string comparisons, as many DOM methods often return null
     * depending on how they are created.
     */
    private static boolean equals(String a, String b) {
        if (a == b)
            return true;
        if (a == null || b == null)
            return false;
        return a.equals(b);
    }

    /**
     * DOM API returns null for the default namespace whereas it should return "".
     */
    private static String fixNull(String s) {
        if (s == null)
            return "";
        else
            return s;
    }
}

Related

1. getElement(Document doc, QName elementQName)
2. getElement(Document doc, String path)
3. getElement(Document pDocument, String psTagName, int index)
4. getElement(Element config, String elementName)
5. getElement(Element config, String elementName)
6. getElement(Element e, String name)
7. getElement(Element e, String nsUri, String localName)
8. getElement(Element el, String label)
9. getElement(Element el, String tagName, int index)