001 /*
002 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003 *
004 * Copyright (c) 2009-2010 Oracle and/or its affiliates. All rights reserved.
005 *
006 * The contents of this file are subject to the terms of either the GNU
007 * General Public License Version 2 only ("GPL") or the Common Development
008 * and Distribution License("CDDL") (collectively, the "License"). You
009 * may not use this file except in compliance with the License. You can
010 * obtain a copy of the License at
011 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
012 * or packager/legal/LICENSE.txt. See the License for the specific
013 * language governing permissions and limitations under the License.
014 *
015 * When distributing the software, include this License Header Notice in each
016 * file and include the License file at packager/legal/LICENSE.txt.
017 *
018 * GPL Classpath Exception:
019 * Oracle designates this particular file as subject to the "Classpath"
020 * exception as provided by Oracle in the GPL Version 2 section of the License
021 * file that accompanied this code.
022 *
023 * Modifications:
024 * If applicable, add the following below the License Header, with the fields
025 * enclosed by brackets [] replaced by your own identifying information:
026 * "Portions Copyright [year] [name of copyright owner]"
027 *
028 * Contributor(s):
029 * If you wish your version of this file to be governed by only the CDDL or
030 * only the GPL Version 2, indicate your decision by adding "[Contributor]
031 * elects to include this software in this distribution under the [CDDL or GPL
032 * Version 2] license." If you don't indicate a single choice of license, a
033 * recipient has the option to distribute your version of this file under
034 * either the CDDL, the GPL Version 2 or to extend the choice of license to
035 * its licensees as provided above. However, if you add GPL Version 2 code
036 * and therefore, elected the GPL Version 2 license, then the option applies
037 * only if the new code is made subject to such option by the copyright
038 * holder.
039 */
040
041 package com.sun.enterprise.admin.cli;
042
043 import java.io.*;
044 import java.net.*;
045 import java.util.*;
046
047 import com.sun.enterprise.universal.i18n.LocalStringsImpl;
048
049 /**
050 * A class loader that loads classes from all jar files
051 * in a specified directory.
052 */
053 public class DirectoryClassLoader extends URLClassLoader {
054 private static final LocalStringsImpl strings =
055 new LocalStringsImpl(DirectoryClassLoader.class);
056
057 /**
058 * Create a DirectoryClassLoader to load from jar files in
059 * the specified directory, with the specified parent class loader.
060 *
061 * @param dir the directory of jar files to load from
062 * @param parent the parent class loader
063 * @throws IOException if the directory can't be accessed
064 */
065 public DirectoryClassLoader(String dir, ClassLoader parent)
066 throws IOException {
067 super(getJars(new File(dir)), parent);
068 }
069
070 /**
071 * Create a DirectoryClassLoader to load from jar files in
072 * the specified directory, with the specified parent class loader.
073 *
074 * @param dir the directory of jar files to load from
075 * @param parent the parent class loader
076 * @throws IOException if the directory can't be accessed
077 */
078 public DirectoryClassLoader(File dir, ClassLoader parent)
079 throws IOException {
080 super(getJars(dir), parent);
081 }
082
083 private static URL[] getJars(File dir) throws IOException {
084 File[] fjars = dir.listFiles(new FilenameFilter() {
085 public boolean accept(File dir, String name) {
086 return name.endsWith(".jar");
087 }
088 });
089 if (fjars == null)
090 throw new IOException(strings.get("DirError", dir));
091 URL[] jars = new URL[fjars.length];
092 for (int i = 0; i < fjars.length; i++)
093 jars[i] = fjars[i].toURI().toURL();
094 return jars;
095 }
096 }