2 * Copyright 2006 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.wamblee.general;
19 import java.io.IOException;
21 import java.net.URLClassLoader;
23 import java.lang.reflect.Method;
25 public class ClassPathHacker {
27 private static final Class[] PARAMETERS = new Class[] { URL.class };
29 private static final String JAR_SUFFIX = ".jar";
31 public static void addJarsInDirectory(File aDirectory) throws IOException {
32 System.out.println("directory '" + aDirectory + "'");
34 for (File aFile : aDirectory.listFiles()) {
36 .println("Considering '" + aFile.getCanonicalPath() + "'");
37 if (aFile.getName().toLowerCase().endsWith(JAR_SUFFIX)) {
38 System.out.println("Adding '" + aFile.getCanonicalPath()
45 public static void addFile(String s) throws IOException {
50 public static void addFile(File f) throws IOException {
54 public static void addURL(URL u) throws IOException {
56 URLClassLoader sysloader = (URLClassLoader) ClassLoader
57 .getSystemClassLoader();
58 Class sysclass = URLClassLoader.class;
61 Method method = sysclass.getDeclaredMethod("addURL", PARAMETERS);
62 method.setAccessible(true);
63 method.invoke(sysloader, new Object[] { u });
64 } catch (Throwable t) {
66 throw new IOException(
67 "Error, could not add URL to system classloader");