| 1 | package org.apache.velocity.runtime.resource; |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2000-2001,2004 The Apache Software Foundation. |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | import java.util.Hashtable; |
| 20 | import java.util.Map; |
| 21 | import java.util.Iterator; |
| 22 | import org.apache.velocity.runtime.RuntimeServices; |
| 23 | |
| 24 | /** |
| 25 | * Default implementation of the resource cache for the default |
| 26 | * ResourceManager. |
| 27 | * |
| 28 | * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> |
| 29 | * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a> |
| 30 | * @version $Id: ResourceCacheImpl.java,v 1.2.8.1 2004/03/03 23:23:01 geirm Exp $ |
| 31 | */ |
| 32 | public class ResourceCacheImpl implements ResourceCache |
| 33 | { |
| 34 | /** |
| 35 | * Cache storage, assumed to be thread-safe. |
| 36 | */ |
| 37 | protected Map cache = new Hashtable(); |
| 38 | |
| 39 | /** |
| 40 | * Runtime services, generally initialized by the |
| 41 | * <code>initialize()</code> method. |
| 42 | */ |
| 43 | protected RuntimeServices rsvc = null; |
| 44 | |
| 45 | public void initialize( RuntimeServices rs ) |
| 46 | { |
| 47 | rsvc = rs; |
| 48 | |
| 49 | rsvc.info("ResourceCache : initialized. (" + this.getClass() + ")"); |
| 50 | } |
| 51 | |
| 52 | public Resource get( Object key ) |
| 53 | { |
| 54 | return (Resource) cache.get( key ); |
| 55 | } |
| 56 | |
| 57 | public Resource put( Object key, Resource value ) |
| 58 | { |
| 59 | return (Resource) cache.put( key, value ); |
| 60 | } |
| 61 | |
| 62 | public Resource remove( Object key ) |
| 63 | { |
| 64 | return (Resource) cache.remove( key ); |
| 65 | } |
| 66 | |
| 67 | public Iterator enumerateKeys() |
| 68 | { |
| 69 | return cache.keySet().iterator(); |
| 70 | } |
| 71 | } |