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     */
017    package org.apache.xbean.classpath;
018    
019    import java.net.URLClassLoader;
020    import java.net.URL;
021    import java.io.File;
022    
023    public class SystemClassPath extends SunURLClassPath {
024    
025        private URLClassLoader sysLoader;
026    
027        public void addJarsToPath(File dir) throws Exception {
028            this.addJarsToPath(dir, getSystemLoader());
029            this.rebuildJavaClassPathVariable();
030        }
031    
032        public void addJarToPath(URL jar) throws Exception {
033            //System.out.println("[|] SYSTEM "+jar.toExternalForm());
034            this.addJarToPath(jar, getSystemLoader());
035            this.rebuildJavaClassPathVariable();
036        }
037    
038        public ClassLoader getClassLoader() {
039            try {
040                return getSystemLoader();
041            } catch (Exception e) {
042                throw new RuntimeException(e);
043            }
044        }
045    
046        private URLClassLoader getSystemLoader() throws Exception {
047            if (sysLoader == null) {
048                sysLoader = (URLClassLoader) ClassLoader.getSystemClassLoader();
049            }
050            return sysLoader;
051        }
052    
053        private void rebuildJavaClassPathVariable() throws Exception {
054            sun.misc.URLClassPath cp = getURLClassPath(getSystemLoader());
055            URL[] urls = cp.getURLs();
056            //for (int i=0; i < urls.length; i++){
057            //    System.out.println(urls[i].toExternalForm());
058            //}
059            if (urls.length < 1)
060                return;
061    
062            StringBuffer path = new StringBuffer(urls.length * 32);
063    
064            File s = new File(urls[0].getFile());
065            path.append(s.getPath());
066            //System.out.println(s.getPath());
067    
068            for (int i = 1; i < urls.length; i++) {
069                path.append(File.pathSeparator);
070    
071                s = new File(urls[i].getFile());
072                //System.out.println(s.getPath());
073                path.append(s.getPath());
074            }
075            try {
076                System.setProperty("java.class.path", path.toString());
077            } catch (Exception e) {
078            }
079        }
080    }