001// Copyright 2009 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.tapestry5.ioc.internal.services; 016 017import org.apache.tapestry5.ioc.Resource; 018import org.apache.tapestry5.ioc.internal.util.CollectionFactory; 019import org.apache.tapestry5.ioc.internal.util.InternalUtils; 020import org.apache.tapestry5.ioc.services.SymbolProvider; 021 022import java.io.IOException; 023import java.io.InputStream; 024import java.util.Map; 025import java.util.Properties; 026 027/** 028 * Makes a {@link org.apache.tapestry5.ioc.Resource} available as a {@link org.apache.tapestry5.ioc.services.SymbolProvider} 029 * 030 * @since 5.1.0.5 031 */ 032public class ResourceSymbolProvider implements SymbolProvider 033{ 034 private final Resource resource; 035 036 private final Map<String, String> properties = CollectionFactory.newCaseInsensitiveMap(); 037 038 public ResourceSymbolProvider(final Resource resource) 039 { 040 this.resource = resource; 041 042 readProperties(); 043 } 044 045 private void readProperties() 046 { 047 Properties p = new Properties(); 048 049 InputStream is = null; 050 051 try 052 { 053 is = resource.openStream(); 054 055 p.load(is); 056 057 is.close(); 058 059 is = null; 060 061 for (Map.Entry<Object, Object> entry : p.entrySet()) 062 { 063 String key = entry.getKey().toString(); 064 065 properties.put(key, p.getProperty(key)); 066 } 067 } 068 catch (IOException ex) 069 { 070 throw new RuntimeException(ex); 071 } 072 finally 073 { 074 InternalUtils.close(is); 075 } 076 } 077 078 @Override 079 public String valueForSymbol(String symbolName) 080 { 081 return properties.get(symbolName); 082 } 083}