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 package org.apache.felix.framework.searchpolicy; 020 021 import java.net.URL; 022 import java.util.*; 023 024 import org.apache.felix.framework.util.Util; 025 import org.apache.felix.moduleloader.*; 026 027 public class R4WireModule implements IWire 028 { 029 private final IModule m_importer; 030 private final IRequirement m_requirement; 031 private final IModule m_exporter; 032 private final ICapability m_capability; 033 private final Map m_pkgMap; 034 035 public R4WireModule(IModule importer, IRequirement requirement, 036 IModule exporter, ICapability capability, Map pkgMap) 037 { 038 m_importer = importer; 039 m_requirement = requirement; 040 m_exporter = exporter; 041 m_capability = capability; 042 m_pkgMap = pkgMap; 043 } 044 045 /* (non-Javadoc) 046 * @see org.apache.felix.framework.searchpolicy.IWire#getImporter() 047 */ 048 public IModule getImporter() 049 { 050 return m_importer; 051 } 052 053 /* (non-Javadoc) 054 * @see org.apache.felix.framework.searchpolicy.IWire#getRequirement() 055 */ 056 public IRequirement getRequirement() 057 { 058 return m_requirement; 059 } 060 061 /* (non-Javadoc) 062 * @see org.apache.felix.framework.searchpolicy.IWire#getExporter() 063 */ 064 public IModule getExporter() 065 { 066 return m_exporter; 067 } 068 069 /* (non-Javadoc) 070 * @see org.apache.felix.framework.searchpolicy.IWire#getCapability() 071 */ 072 public ICapability getCapability() 073 { 074 return m_capability; 075 } 076 077 /* (non-Javadoc) 078 * @see org.apache.felix.framework.searchpolicy.IWire#hasPackage(java.lang.String) 079 */ 080 public boolean hasPackage(String pkgName) 081 { 082 return (m_pkgMap.get(pkgName) != null); 083 } 084 085 /* (non-Javadoc) 086 * @see org.apache.felix.framework.searchpolicy.IWire#getClass(java.lang.String) 087 */ 088 public Class getClass(String name) throws ClassNotFoundException 089 { 090 // Get the package of the target class. 091 String pkgName = Util.getClassPackage(name); 092 093 ResolvedPackage rp = (ResolvedPackage) m_pkgMap.get(pkgName); 094 if (rp != null) 095 { 096 try 097 { 098 Class clazz = m_exporter.getClassByDelegation(name); 099 if (clazz != null) 100 { 101 return clazz; 102 } 103 } 104 catch (ClassNotFoundException ex) 105 { 106 // Do not throw the exception here, since we want 107 // to continue search other package sources and 108 // ultimately the module's own content. 109 } 110 } 111 112 return null; 113 } 114 115 /* (non-Javadoc) 116 * @see org.apache.felix.framework.searchpolicy.IWire#getResource(java.lang.String) 117 */ 118 public URL getResource(String name) throws ResourceNotFoundException 119 { 120 // Get the package of the target class. 121 String pkgName = Util.getResourcePackage(name); 122 123 ResolvedPackage rp = (ResolvedPackage) m_pkgMap.get(pkgName); 124 if (rp != null) 125 { 126 URL url = m_exporter.getResourceByDelegation(name); 127 if (url != null) 128 { 129 return url; 130 } 131 132 // Don't throw ResourceNotFoundException because module 133 // dependencies support split packages. 134 } 135 136 return null; 137 } 138 139 /* (non-Javadoc) 140 * @see org.apache.felix.framework.searchpolicy.IWire#getResources(java.lang.String) 141 */ 142 public Enumeration getResources(String name) throws ResourceNotFoundException 143 { 144 // Get the package of the target class. 145 String pkgName = Util.getResourcePackage(name); 146 147 // See if we have a resolved package for the resource's package. 148 // If so, loop through all package sources and aggregate any 149 // matching resource enumerations. 150 ResolvedPackage rp = (ResolvedPackage) m_pkgMap.get(pkgName); 151 if (rp != null) 152 { 153 Enumeration urls = m_exporter.getResourcesByDelegation(name); 154 if (urls != null) 155 { 156 return urls; 157 } 158 159 // Don't throw ResourceNotFoundException because module 160 // dependencies support split packages. 161 } 162 163 return null; 164 } 165 166 public String toString() 167 { 168 return m_importer + " -> " + m_capability + " -> " + m_exporter; 169 } 170 }