| /* |
| * 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 org.apache.axis2.tools.idea; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.util.ArrayList; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipInputStream; |
| |
| public class PluginClassLoader extends URLClassLoader { |
| |
| //urls which gives to create the classLoader |
| private URL[] urls; |
| |
| //To keep jar files inside /lib directory in the main jar |
| private ArrayList lib_jars_list; |
| |
| |
| /** |
| * PluginClassLoader is exetend form URLClassLoader , and the constructor |
| * has not overide the super constroctor , but has done some stuff to find out |
| * jar fils inside /lib director |
| * |
| * @param urls <code>URL</code> |
| * @param parent parent classloader <code>ClassLoader</code> |
| */ |
| public PluginClassLoader(URL[] urls, ClassLoader parent) { |
| super(urls, parent); |
| this.urls = urls; |
| lib_jars_list = new ArrayList(); |
| findLibJars(); |
| } |
| |
| /** |
| * This just search for jar files inside /lib dirctory and if there are any then those |
| * will be added to the arraylit (only the name of the jar file) |
| */ |
| private void findLibJars() { |
| /** |
| * though the URL array can contains one or more urls , I have only consider the |
| * first one , that is this classLoader is only for Axis2 stuff and the classloader |
| * is created by Deployment , so there wont be any chance to have more the one urls for |
| * the URL array list |
| */ |
| File file = new File(urls[0].getFile()); |
| try { |
| ZipInputStream zin = new ZipInputStream(new FileInputStream(file)); |
| ZipEntry entry; |
| String entryName = ""; |
| while ((entry = zin.getNextEntry()) != null) { |
| entryName = entry.getName(); |
| /** |
| * id the entry name start with /lib and end with .jar |
| * then those entry name will be added to the arraylist |
| */ |
| if (entryName != null && (entryName.startsWith("lib/") || |
| entryName.startsWith("Lib/")) && |
| entryName.endsWith(".jar")) { |
| lib_jars_list.add(entryName); |
| } |
| } |
| zin.close(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** |
| * @param name <code>String</code> Name of the file to be loaded |
| * @return <code>Class</code> return a class object if it found else |
| * will return null or a ClassNotFoundException |
| * <p/> |
| * This method has been overridden in the following way |
| * 1. It calls the super class and checks to see whether the class is there |
| * If the class is found then return it, else if super return ClassNotfoundException |
| * 2. Check whether the entry corresponding to the class name exists in one of jar files |
| * in /lib director |
| * 3. If it is there get the byte array out of that and create a Class object out of that |
| * by calling "defineClass()" , if it succeeds then return that else |
| * 4. Throw a ClassNotFoundException |
| * @throws ClassNotFoundException |
| */ |
| protected Class findClass(final String name) |
| throws ClassNotFoundException { |
| Class cla = null; |
| try { |
| boolean foundClass = false; |
| try { |
| cla = super.findClass(name); |
| foundClass = true; |
| return cla; |
| } catch (ClassNotFoundException e) { |
| foundClass = false; |
| } |
| if (!foundClass) { |
| byte raw[] = getBytes(name); |
| cla = defineClass(name, raw, 0, raw.length); |
| foundClass = true; |
| return cla; |
| } |
| if (!foundClass) { |
| throw new ClassNotFoundException("Class Not found : " + name); |
| } |
| |
| } catch (Exception e) { |
| |
| } |
| return null; |
| } |
| |
| /** |
| * Read jar file (/lib) one by one , then for each file craete <code>ZipInputStream</code> |
| * that and check to see wether there is any entry eith given name if it found then |
| * Creat ByteArrayOutPutStream and get the class bytes to that . |
| * after goning throgh each and evry jar file if there is no entry with given name |
| * will throug a ClassNotFound execption |
| * |
| * @param filename <code>String</code> Name of the file to be loaded (Class Name) |
| * @return bytt[] |
| * @throws java.io.IOException <code>Exception</code> |
| */ |
| private byte[] getBytes(String filename) throws Exception { |
| String completeFileName = filename; |
| /** |
| * Replacing org.apache. -> org/apache/... |
| */ |
| completeFileName = completeFileName.replace('.', '/').concat(".class"); |
| byte raw[] = null; |
| for (int i = 0; i < lib_jars_list.size(); i++) { |
| String libjar_name = (String) lib_jars_list.get(i); |
| InputStream in = this.getResourceAsStream(libjar_name); |
| try { |
| ZipInputStream zin = new ZipInputStream(in); |
| ZipEntry entry; |
| String entryName = ""; |
| while ((entry = zin.getNextEntry()) != null) { |
| entryName = entry.getName(); |
| if (entryName != null && |
| entryName.endsWith(completeFileName)) { |
| byte data[] = new byte[2048]; |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| int count; |
| while ((count = zin.read(data, 0, 2048)) != -1) { |
| out.write(data, 0, count); |
| } |
| raw = out.toByteArray(); |
| out.close(); |
| zin.close(); |
| return raw; |
| } |
| } |
| } catch (IOException e) { |
| throw e; |
| } |
| |
| } |
| throw new ClassNotFoundException("Class Not found : " + filename); |
| } |
| } |
| |