get Element Descendant - Java XML

Java examples for XML:DOM Element

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Description

get Element Descendant

Demo Code

/**// w  ww .j  ava 2s .  c  om
 * Copyright (c) 2009 DITA2InDesign project (dita2indesign.sourceforge.net)  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at     http://www.apache.org/licenses/LICENSE-2.0  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. 
 */
//package com.java2s;

import org.w3c.dom.Element;

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

public class Main {
    public static Element getElementDescendant(Element elem, String ns_uri,
            String tagName) {
        NodeList nl = elem.getChildNodes();
        for (int i = 0; i < nl.getLength(); i++) {
            Node node = nl.item(i);
            if (node.getNodeType() == Node.ELEMENT_NODE) {
                if ((node.getNamespaceURI() == null || node
                        .getNamespaceURI().equals(ns_uri))
                        && node.getLocalName().equals(tagName)) {
                    return (Element) node;
                } else {
                    Element cand = getElementDescendant((Element) node,
                            ns_uri, tagName);
                    if (cand != null)
                        return cand;
                }
            }
        }
        return null;
    }
}

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