001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.xbean.classpath;
018
019import java.io.File;
020import java.net.URL;
021import java.net.URLClassLoader;
022
023public abstract class SunURLClassPath implements ClassPath {
024
025    public static ClassLoader getContextClassLoader() {
026        return Thread.currentThread().getContextClassLoader();
027    }
028
029    private java.lang.reflect.Field ucpField;
030
031    protected void addJarToPath(final URL jar, final URLClassLoader loader) throws Exception {
032        this.getURLClassPath(loader).addURL(jar);
033    }
034
035    protected void addJarsToPath(final File dir, final URLClassLoader loader) throws Exception {
036        if (dir == null || !dir.exists()) return;
037        //System.out.println("DIR "+dir);
038        // Get the list of jars and zips
039        String[] jarNames = dir.list(new java.io.FilenameFilter() {
040            public boolean accept(File dir, String name) {
041                //System.out.println("FILE "+name);
042                return (name.endsWith(".jar") || name.endsWith(".zip"));
043            }
044        });
045
046        // Create URLs from them
047        final URL[] jars = new URL[jarNames.length];
048        for (int j = 0; j < jarNames.length; j++) {
049            jars[j] = new File(dir, jarNames[j]).toURI().toURL();
050        }
051
052        sun.misc.URLClassPath path = getURLClassPath(loader);
053        for (int i = 0; i < jars.length; i++) {
054            //System.out.println("URL "+jars[i]);
055            path.addURL(jars[i]);
056        }
057    }
058
059    protected sun.misc.URLClassPath getURLClassPath(URLClassLoader loader) throws Exception {
060        return (sun.misc.URLClassPath) getUcpField().get(loader);
061    }
062
063    private java.lang.reflect.Field getUcpField() throws Exception {
064        if (ucpField == null) {
065            // Add them to the URLClassLoader's classpath
066            ucpField = URLClassLoader.class.getDeclaredField("ucp");
067            ucpField.setAccessible(true);
068        }
069        return ucpField;
070    }
071
072}