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.classloader;
018    
019    import java.util.jar.Manifest;
020    import java.util.jar.JarFile;
021    import java.util.jar.JarEntry;
022    import java.net.URL;
023    import java.net.MalformedURLException;
024    import java.io.IOException;
025    
026    /**
027     * @version $Rev: 437551 $ $Date: 2006-08-28 06:14:47 +0000 (Mon, 28 Aug 2006) $
028     */
029    public class JarResourceLocation extends AbstractUrlResourceLocation  {
030        private final JarFile jarFile;
031    
032        public JarResourceLocation(URL codeSource, JarFile jarFile) {
033            super(codeSource);
034            this.jarFile = jarFile;
035        }
036    
037        public ResourceHandle getResourceHandle(String resourceName) {
038            JarEntry jarEntry = jarFile.getJarEntry(resourceName);
039            if (jarEntry != null) {
040                try {
041                    URL url = new URL(getCodeSource(), resourceName);
042                    return new JarResourceHandle(jarFile, jarEntry, getCodeSource());
043                } catch (MalformedURLException e) {
044                }
045            }
046            return null;
047        }
048    
049        public Manifest getManifest() throws IOException {
050            return jarFile.getManifest();
051        }
052    
053        public void close() {
054            IoUtil.close(jarFile);
055        }
056    }