import java.io.IOException;

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

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;


public class XPathTest {

	
	public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException, XPathExpressionException{
		
		final String entryXpath = "//entry/*/text()";
        final String contentXpath = "//content/*";
		
		DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
		domFactory.setNamespaceAware(false);
		
		DocumentBuilder builder = domFactory.newDocumentBuilder();
		Document doc = builder.parse("/Users/nathanschwermann/Desktop/blog.xml");
		
		XPathFactory factory = XPathFactory.newInstance();
		XPath xpath = factory.newXPath();
		
		javax.xml.xpath.XPathExpression expr = xpath.compile(contentXpath);
		Object result = expr.evaluate(doc, XPathConstants.STRING);
		System.out.println((String)result);
		
		expr = xpath.compile(entryXpath);
		result = expr.evaluate(doc, XPathConstants.NODESET);
		NodeList nodes = (NodeList)result;
		System.out.println("----======printing nodes=====------");
		for(int i = 0; i < nodes.getLength(); i++){
			System.out.println(nodes.item(i).getNodeValue());
		}

	}

}