Source Code : Macro to get the content of a unique child element.

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Macro to get the content of a unique child element.

    

import java.util.ArrayList;
import java.util.Iterator;

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

/*
  * JBoss, Home of Professional Open Source
  * Copyright 2005, JBoss Inc., and individual contributors as indicated
  * by the @authors tag. See the copyright.txt 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.
  */

public class Utils {
  /**
   * Macro to get the content of a unique child element.
   *
   * @param element    The parent element.
   * @param tagName    The name of the desired child.
   * @return           The element content or null.
   */
  public static String getUniqueChildContent(Element element,
                                             String tagName)
     throws Exception
  {
     return getElementContent(getUniqueChild(element, tagName));
  }
  /**
   * Get the content of the given element.
   *
   * @param element    The element to get the content for.
   * @return           The content of the element or null.
   */
  public static String getElementContent(final Element element)
     throws Exception
  {
     return getElementContent(element, null);
  }

  /**
   * Get the content of the given element.
   *
   * @param element       The element to get the content for.
   * @param defaultStr    The default to return when there is no content.
   * @return              The content of the element or the default.
   */
  public static String getElementContent(Element element, String defaultStr)
     throws Exception
  {
     if (element == null)
        return defaultStr;

     NodeList children = element.getChildNodes();
     String result = "";
     for (int i = 0; i < children.getLength(); i++)
     {
        if (children.item(i).getNodeType() == Node.TEXT_NODE || 
            children.item(i).getNodeType() == Node.CDATA_SECTION_NODE)
        {
           result += children.item(i).getNodeValue();
        }
        else if( children.item(i).getNodeType() == Node.COMMENT_NODE )
        {
           // Ignore comment nodes
        }
     }
     return result.trim();
  }
  /**
   * Gets the child of the specified element having the specified unique
   * name.  If there are more than one children elements with the same name
   * and exception is thrown.
   *
   * @param element    The parent element
   * @param tagName    The name of the desired child
   * @return           The named child.
   *
   * @throws Exception   Child was not found or was not unique.
   */
  public static Element getUniqueChild(Element element, String tagName)
     throws Exception
  {
     Iterator<Element> goodChildren = getChildrenByTagName(element, tagName);

     if (goodChildren != null && goodChildren.hasNext()) {
        Element child = goodChildren.next();
        if (goodChildren.hasNext()) {
           throw new Exception
              ("expected only one " + tagName + " tag");
        }
        return child;
     } else {
        throw new Exception
           ("expected one " + tagName + " tag");
     }
  }
  /**
   * Returns an iterator over the children of the given element with
   * the given tag name.
   *
   * @param element    The parent element
   * @param tagName    The name of the desired child
   * @return           An interator of children or null if element is null.
   */
  public static Iterator<Element> getChildrenByTagName(Element element,
                                              String tagName)
  {
     if (element == null) return null;
     // getElementsByTagName gives the corresponding elements in the whole 
     // descendance. We want only children

     NodeList children = element.getChildNodes();
     ArrayList<Element> goodChildren = new ArrayList<Element>();
     for (int i=0; i<children.getLength(); i++) {
        Node currentChild = children.item(i);
        if (currentChild.getNodeType() == Node.ELEMENT_NODE && 
            ((Element)currentChild).getTagName().equals(tagName)) {
           goodChildren.add((Element)currentChild);
        }
     }
     return goodChildren.iterator();
  }

}

   
    
    
    
  

Thank with us