Finds and returns the first child node with the given qualified name. : Namespace « XML « Java Tutorial

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3. Namespace

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

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

public class Main {
  
  /** Finds and returns the first child node with the given qualified name. */
  public static Element getFirstChildElementNS(Node parent,
          String[][] elemNames) {
      
      // search for node
      Node child = parent.getFirstChild();
      while (child != null) {
          if (child.getNodeType() == Node.ELEMENT_NODE) {
              for (int i = 0; i < elemNames.length; i++) {
                  String uri = child.getNamespaceURI();
                  if (uri != null && uri.equals(elemNames[i][0]) &&
                          child.getLocalName().equals(elemNames[i][1])) {
                      return (Element)child;
                  }
              }
          }
          child = child.getNextSibling();
      }
      
      // not found
      return null;
      
  } // getFirstChildElementNS(Node,String[][]):Element
}