Get the first element child. : DOM Element « XML « Java Tutorial

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/**
 * 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.
 */

import java.io.OutputStream;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Node;

/**
 * Few simple utils to read DOM. This is originally from the Jakarta Commons
 * Modeler.
 * 
 * @author Costin Manolache
 */
public class Utils {
  /**
   * Get the first element child.
   * 
   * @param parent lookup direct childs
   * @param name name of the element. If null return the first element.
   */
  public static Node getChild(Node parent, String name) {
      if (parent == null) {
          return null;
      }

      Node first = parent.getFirstChild();
      if (first == null) {
          return null;
      }

      for (Node node = first; node != null; node = node.getNextSibling()) {
          // System.out.println("getNode: " + name + " " +
          // node.getNodeName());
          if (node.getNodeType() != Node.ELEMENT_NODE) {
              continue;
          }
          if (name != null && name.equals(node.getNodeName())) {
              return node;
          }
          if (name == null) {
              return node;
          }
      }
      return null;
  }
}