Java XML Element Find findElement(Element root, String localName, String namespace)

Description

find Element

License

Open Source License

Declaration

public static Element findElement(Element root, String localName, String namespace) 

Method Source Code

//package com.java2s;
/*//from  w  w w  . j av a  2s  . c om
 * JBoss, Home of Professional Open Source.
 * Copyright 2006, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

import javax.xml.namespace.QName;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

public class Main {
    public static Element findElement(Element root, String localName, String namespace) {
        return findElement(root, new QName(namespace, localName));
    }

    public static Element findElement(Element root, QName name) {
        // Here lies your standard recusive DFS.....
        if (matchNode(root, name))
            return root;

        // Search children
        for (Node child = root.getFirstChild(); child != null; child = child.getNextSibling()) {
            if (child.getNodeType() != Node.ELEMENT_NODE)
                continue;

            Node possibleMatch = findElement((Element) child, name);
            if (possibleMatch != null)
                return (Element) possibleMatch;
        }

        return null;
    }

    public static boolean matchNode(Node node, QName name) {
        return matchNode(node, name, false);
    }

    public static boolean matchNode(Node node, QName name, boolean local) {
        return equalStrings(node.getLocalName(), name.getLocalPart())
                && (local || equalStrings(node.getNamespaceURI(), name.getNamespaceURI()));
    }

    public static boolean equalStrings(String string1, String string2) {
        if (string1 == null && string2 == null)
            return true;

        return string1 != null && string1.equals(string2);
    }
}

Related

1. findAllElementsByTagNameNS(Element el, String nameSpaceURI, String localName, List elementList)
2. findComponentElement(Element root)
3. findComponentElement(Element root)
4. findElement(Element element, String elementName)
5. findElement(Element element, String name)
6. findElement(Element topElm, String localName, String namespace)
7. findElement(final Element e, final String find)
8. findElement(final String idValue, final String idTagName, final String tagName, final Element root)
9. findElementAsString(final Element e, final String find)