Java EE (Java Enterprise Edition) General Discussion

Hi,

I am newbie for JAXP, using XML stuff from long time, but never bothered to look behind the common utilities, this time , i thought of writing my own code to handle xml related stuff, I started with XPath and got stucked in a problem and ended up writing it here.

I have this sample program, which uses JAXP to read an xml document. it works well when I am reading value of a node, but it is not returning me the nodelist or node object.

Looking for JAXP experts to help me.

Here is the code

package com.xml.xpath.test;

import java.io.File;
import java.util.Iterator;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;

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

public class XPathTest {
	
	public static void main(String[] args) throws Exception {
		
		
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		
		File xmlFile = new File("Sample.xml");

		// Create a DocumentBuilder
		DocumentBuilder builder = factory.newDocumentBuilder();
		
//		 Parse an XML document
		Document document = builder.parse(xmlFile);
		
		XPath xPath = XPathFactory.newInstance().newXPath();
		
		// this works gets the value of the node
		System.out.println("value is " + xPath.evaluate("/catalog/journal/article[2]/title",document));
		
		//this doesn't work doesn't give me the node
		System.out.println("value is " + xPath.evaluate("/catalog/journal/article[2]/title",document,XPathConstants.NODE));
		
		
		//Even getting list doesn't seems working
		NodeList list = (NodeList)xPath.evaluate("/catalog/journal/article",document,XPathConstants.NODESET);
		for(int i=0;i<list.getLength();i++ ) {
			
			System.out.println(list.item(i).getChildNodes().item(0).getNodeValue());
			
		}
		
		
		}

}

Output of the program
value is Data Binding with XMLBeans1
value is [title: null]


Here the sample.xml used in this program

<?xml version="1.0" encoding="UTF-8"?>
<catalog title="OnJava.com" publisher="O'Reilly">
<journal date="January 2004">
<article>
<title>Data Binding with XMLBeans</title>
<author>Daniel Steinberg</author>
</article>
<article>
<title>Data Binding with XMLBeans1</title>
<author>Daniel Steinberg1</author>
</article>
<article>
<title>Data Binding with XMLBeans2</title>
<author>Daniel Steinberg2</author>
</article>
<article>
<title>Data Binding with XMLBeans3</title>
<author>Daniel Steinberg3</author>
</article>
<article>
<title>Data Binding with XMLBeans3</title>
<author>Daniel Steinberg3</author>
</article>
</journal>
</catalog>