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. 014 015 package org.apache.hivemind.util; 016 017 import java.util.Locale; 018 019 import org.apache.hivemind.ClassResolver; 020 021 /** 022 * Searches for a localization of a 023 * particular resource in the classpath (using 024 * a {@link org.apache.hivemind.ClassResolver}. 025 * 026 * 027 * @author Howard Lewis Ship 028 */ 029 public class LocalizedResourceFinder 030 { 031 private ClassResolver _resolver; 032 033 public LocalizedResourceFinder(ClassResolver resolver) 034 { 035 _resolver = resolver; 036 } 037 038 /** 039 * Resolves the resource, returning a path representing 040 * the closest match (with respect to the provided locale). 041 * Returns null if no match. 042 * 043 * <p>The provided path is split into a base path 044 * and a suffix (at the last period character). The locale 045 * will provide different suffixes to the base path 046 * and the first match is returned. 047 */ 048 049 public LocalizedResource resolve(String resourcePath, Locale locale) 050 { 051 int dotx = resourcePath.lastIndexOf('.'); 052 String basePath; 053 String suffix; 054 if (dotx >= 0) { 055 basePath = resourcePath.substring(0, dotx); 056 suffix = resourcePath.substring(dotx); 057 } 058 else 059 { 060 // Resource without extension 061 basePath = resourcePath; 062 suffix = ""; 063 } 064 065 LocalizedNameGenerator generator = new LocalizedNameGenerator(basePath, locale, suffix); 066 067 while (generator.more()) 068 { 069 String candidatePath = generator.next(); 070 071 if (_resolver.getResource(candidatePath) != null) 072 return new LocalizedResource(candidatePath, generator.getCurrentLocale()); 073 } 074 075 return null; 076 } 077 }