XPathExample.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Eclipse Public License version 1.0, available at
 * http://www.eclipse.org/legal/epl-v10.html
 */

package org.jboss.forge.service.main;

import java.io.InputStream;
import java.io.StringReader;
import java.net.URL;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;

import org.xml.sax.InputSource;

/**
 *
 * @author <a href="mailto:[email protected]">George Gastaldi</a>
 */
public class XPathExample
{
   public static void main(String[] args) throws Exception
   {
      XPath xpath = XPathFactory.newInstance().newXPath();
      String data = readURL();
      System.out.println(
               xpath.evaluate("metadata/versioning/snapshot/timestamp", new InputSource(new StringReader(data))));
      System.out.println(
               xpath.evaluate("metadata/versioning/snapshot/buildNumber", new InputSource(new StringReader(data))));
   }

   private static String readURL() throws Exception
   {
      URL url = new URL(
               "http://repository-projectodd.forge.cloudbees.com/snapshot/org/wildfly/swarm/jaxrs-runtime/1.0.0.Beta5-SNAPSHOT/maven-metadata.xml");
      try (InputStream is = url.openStream())
      {
         byte[] contents = new byte[is.available()];
         is.read(contents);
         return new String(contents);
      }
   }

}