How to get TOMCAT properties from server.xml configuration file

gistfile1.java

package test;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.channels.NonWritableChannelException;

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.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

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

public class TomcatConfig {
	
//	private static Log LOGGER = LogFactory.getLog(TomcatConfig.class);
//	String serverXmlPath = "C:\\Program Files (x86)\\Apache Software Foundation\\Tomcat 6.0\\conf\\server.xml";
	
	public static String SERVER_XML =
			 "C:\\Program Files (x86)\\Apache Software Foundation\\Tomcat 6.0\\conf\\server.xml";
	
//			"/usr/local/TOMCAT/conf/server.xml"; 
	public static Integer PORT_NUMBER = null;
	
	public static Integer getTomcatPortFromConfigXml() {
//		FileLock lock = null;
		FileInputStream fis = null;
		
		if(PORT_NUMBER == null){
		
//			LOGGER.debug("Port number is null");
		
			try {
				
				fis = new FileInputStream(SERVER_XML);
//				lock = fis.getChannel().tryLock(0L, Long.MAX_VALUE, true);
				
				DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
				domFactory.setNamespaceAware(true); // never forget this!
				DocumentBuilder builder = domFactory.newDocumentBuilder();
				Document doc = builder.parse(fis);
				
				XPathFactory factory = XPathFactory.newInstance();
				XPath xpath = factory.newXPath();
				XPathExpression expr = xpath.compile("/Server/Service[@name='Catalina']/Connector[count(@scheme)=0]/@port[1]");
				String result = (String) expr.evaluate(doc, XPathConstants.STRING);
				
				PORT_NUMBER = result != null && result.length() > 0 ? Integer.valueOf(result) : null;
				System.out.println("PORT_NUMBER:" + PORT_NUMBER);
				fis.close();
//				lock.release();
				
			} catch (FileNotFoundException e) {
				PORT_NUMBER = null;
//				e.printStackTrace();
//				LOGGER.error(e.getMessage());
			} catch (XPathExpressionException e) {
				PORT_NUMBER = null;
//				e.printStackTrace();
//				LOGGER.error(e.getMessage());
			} catch (SAXException e) {
				PORT_NUMBER = null;
//				e.printStackTrace();
//				LOGGER.error(e.getMessage());
			} catch (ParserConfigurationException e) {
				PORT_NUMBER = null;
				e.printStackTrace();
//				LOGGER.error(e.getMessage());
			} catch (IOException e) {
				PORT_NUMBER = null;
				e.printStackTrace();
//				LOGGER.error(e.getMessage());
			} catch (NonWritableChannelException e){
//				LOGGER.error(e.getMessage());
				e.printStackTrace();
			}
		}
		return PORT_NUMBER;
	}
}