001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *  http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    package org.apache.xbean.osgi.bundle.util.equinox;
021    
022    import java.io.IOException;
023    import java.net.URL;
024    import java.util.Enumeration;
025    
026    import org.apache.xbean.osgi.bundle.util.BundleResourceHelper;
027    import org.eclipse.osgi.service.urlconversion.URLConverter;
028    import org.osgi.framework.Bundle;
029    import org.osgi.framework.BundleContext;
030    import org.osgi.framework.ServiceReference;
031    
032    /**
033     * Equinox implementation of BundleResourceHelper.
034     * <br/>
035     * This implementation of the {@link BundleResourceHelper} converts resource URLs
036     * returned by {@link #getResource(String)} and {@link #getResources(String)} into <tt>jar</tt> URLs
037     * using Equinox's <tt>URLConverter</tt> service.
038     * 
039     * @version $Rev: 1067587 $ $Date: 2011-02-06 13:15:22 +0800 (Sun, 06 Feb 2011) $
040     */
041    public class EquinoxBundleResourceHelper extends BundleResourceHelper {
042    
043        private URLConverter converter;
044        
045        public EquinoxBundleResourceHelper(Bundle bundle, boolean searchWiredBundles, boolean convertResourceUrls) {
046            super(bundle, searchWiredBundles, convertResourceUrls);
047            init();
048        }
049    
050        private void init() {
051            BundleContext context = bundle.getBundleContext();
052            if (context != null) {
053                ServiceReference urlReference = context.getServiceReference(URLConverter.class.getName());
054                if (urlReference != null) { 
055                    converter = (URLConverter) context.getService(urlReference);
056                }
057            }
058        }
059        
060        @Override
061        public URL getResource(String name) {
062            if (convertResourceUrls) {
063                return (converter == null) ? convertedFindResource(name) : findResource(name);            
064            } else {
065                return findResource(name);
066            }
067        }
068        
069        @Override
070        public Enumeration<URL> getResources(String name) throws IOException {
071            if (convertResourceUrls) {
072                return (converter == null) ? convertedFindResources(name) : findResources(name);   
073            } else {
074                return findResources(name);
075            }
076        }
077              
078        @Override
079        protected URL convert(URL url) {
080            try {
081                URL convertedURL = converter.resolve(url);
082                return convertedURL;
083            } catch (IOException e) {
084                e.printStackTrace();
085                return url;
086            }
087        }
088           
089    }