Finds and returns the first child node with the given name and attribute name, value pair. : DOM Element « XML « Java Tutorial

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3. DOM Element

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 name and
   * attribute name, value pair.
   */
  public static Element getFirstChildElement(Node   parent,
          String elemName,
          String attrName,
          String attrValue) {
      
      // search for node
      Node child = parent.getFirstChild();
      while (child != null) {
          if (child.getNodeType() == Node.ELEMENT_NODE) {
              Element element = (Element)child;
              if (element.getNodeName().equals(elemName) &&
                      element.getAttribute(attrName).equals(attrValue)) {
                  return element;
              }
          }
          child = child.getNextSibling();
      }
      
      // not found
      return null;
      
  } // getFirstChildElement(Node,String,String,String):Element
}