001/* 002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nuxeo - initial API and implementation 018 * 019 * $Id$ 020 */ 021 022package org.nuxeo.runtime.osgi; 023 024import java.net.URL; 025 026import org.nuxeo.runtime.RuntimeService; 027import org.nuxeo.runtime.api.Framework; 028import org.nuxeo.runtime.model.impl.DefaultRuntimeContext; 029import org.osgi.framework.Bundle; 030import org.osgi.framework.Constants; 031 032/** 033 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 034 */ 035public class OSGiRuntimeContext extends DefaultRuntimeContext { 036 037 protected final Bundle bundle; 038 039 protected String hostBundleId; 040 041 protected Bundle hostBundle; 042 043 public OSGiRuntimeContext(Bundle bundle) { 044 this(Framework.getRuntime(), bundle); 045 } 046 047 public OSGiRuntimeContext(RuntimeService runtime, Bundle bundle) { 048 super(runtime); 049 this.bundle = bundle; 050 // workaround to correctly handle fragment class loaders 051 hostBundleId = (String) bundle.getHeaders().get(Constants.FRAGMENT_HOST); 052 if (hostBundleId != null) { 053 int p = hostBundleId.indexOf(';'); 054 if (p > -1) { // remove version or other extra information if any 055 hostBundleId = hostBundleId.substring(0, p); 056 } 057 } 058 } 059 060 @Override 061 public Bundle getBundle() { 062 return bundle; 063 } 064 065 @Override 066 public URL getResource(String name) { 067 URL url = null; 068 if (hostBundleId != null) { 069 url = getHostBundle().getResource(name); 070 } else { 071 url = bundle.getResource(name); 072 } 073 if (url == null) { 074 url = Framework.getResourceLoader().getResource(name); 075 } 076 return url; 077 } 078 079 @Override 080 public URL getLocalResource(String name) { 081 URL url = null; 082 if (hostBundleId != null) { 083 url = getHostBundle().getEntry(name); 084 } else { 085 url = bundle.getEntry(name); 086 } 087 if (url == null) { 088 url = Framework.getResourceLoader().getResource(name); 089 } 090 return url; 091 } 092 093 @Override 094 public Class<?> loadClass(String className) throws ClassNotFoundException { 095 try { 096 if (hostBundleId != null) { // workaround to handle fragment bundles that doesn't have class loaders 097 return getHostBundle().loadClass(className); 098 } 099 return bundle.loadClass(className); 100 } catch (ClassNotFoundException e) { 101 return Framework.getResourceLoader().loadClass(className); 102 } 103 } 104 105 public Bundle getHostBundle() { 106 if (hostBundleId != null) { 107 if (hostBundle == null && runtime instanceof OSGiRuntimeService) { 108 hostBundle = ((OSGiRuntimeService) runtime).findHostBundle(bundle); 109 } 110 } 111 return hostBundle; 112 } 113 114}