content: /*
   *  Copyright Beijing 58 Information Technology Co.,Ltd.
   *
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   */
  package com.bj58.spat.gaea.server.deploy.hotdeploy;
  
  import java.lang.reflect.Method;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.net.URLClassLoader;
  import java.util.List;
  
  import com.bj58.spat.gaea.server.util.FileHelper;
  
  /**
   * A URLClassLoader for dynamic load class from jar
   * 
   * @author Service Platform Architecture Team (spat@58.com)
   */
  public class DynamicURLClassLoader {
  
  	private static Method addURL;
  
  	static {
  		try {
  			addURL = URLClassLoader.class.getDeclaredMethod("addURL", new Class[] { URL.class });
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
  		addURL.setAccessible(true);
  	}
  	
  
  	private URLClassLoader classLoader;
  	
  	public DynamicURLClassLoader() throws MalformedURLException {
  		classLoader = new URLClassLoader(new URL[]{new URL("file", "", "")});
  	}
   
  	
  
  	public void addURL(URL url) throws Exception {
  		addURL.invoke(classLoader, new Object[] { url });
  	}
  	
  	public void addURL(String path) throws Exception {
  		URL url = new URL("file", "", path);
  		addURL(url);
  	}
  	
  	/**
  	 * add folder jars
  	 * @param path
  	 * @throws Exception 
  	 */
  	public void addFolder(String... dirs) throws Exception {
  		List<String> jarList = FileHelper.getUniqueLibPath(dirs);
  		for(String jar : jarList) {
  			addURL(jar);
  		}
  	}
  	
  	
  	public Class<?> loadClass(String className) throws ClassNotFoundException {
  		return classLoader.loadClass(className);
  	}
  }