001// Copyright 2004, 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.hivemind.util; 016 017import java.net.URL; 018import java.util.Locale; 019 020import org.apache.hivemind.ClassResolver; 021import org.apache.hivemind.Resource; 022 023/** 024 * Implementation of {@link org.apache.hivemind.Resource} 025 * for resources found within the classpath. 026 * 027 * 028 * @author Howard Lewis Ship 029 */ 030 031public class ClasspathResource extends AbstractResource 032{ 033 private ClassResolver _resolver; 034 035 public ClasspathResource(ClassResolver resolver, String path) 036 { 037 this(resolver, path, null); 038 } 039 040 public ClasspathResource(ClassResolver resolver, String path, Locale locale) 041 { 042 super(path, locale); 043 044 _resolver = resolver; 045 } 046 047 /** 048 * Locates the localization of the 049 * resource using {@link LocalizedResourceFinder}. 050 */ 051 052 public Resource getLocalization(Locale locale) 053 { 054 String path = getPath(); 055 LocalizedResourceFinder finder = new LocalizedResourceFinder(_resolver); 056 057 LocalizedResource localizedResource = finder.resolve(path, locale); 058 059 if (localizedResource == null) 060 return null; 061 062 String localizedPath = localizedResource.getResourcePath(); 063 Locale pathLocale = localizedResource.getResourceLocale(); 064 065 if (localizedPath == null) 066 return null; 067 068 if (path.equals(localizedPath)) 069 return this; 070 071 return new ClasspathResource(_resolver, localizedPath, pathLocale); 072 } 073 074 /** 075 * Invokes {@link ClassResolver#getResource(String)} with the path. 076 */ 077 078 public URL getResourceURL() 079 { 080 return _resolver.getResource(getPath()); 081 } 082 083 public String toString() 084 { 085 return "classpath:" + getPath(); 086 } 087 088 public int hashCode() 089 { 090 return 4783 & getPath().hashCode(); 091 } 092 093 protected Resource newResource(String path) 094 { 095 return new ClasspathResource(_resolver, path); 096 } 097 098}