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

Description

get Element

License

Open Source License

Declaration

public static Element getElement(Element e, String nsUri, String localName) 

Method Source Code

//package com.java2s;
/*//from   w ww.ja va2  s  . c o m
 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

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