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Java > Open Source Codes > org > springframework > webflow > core > collection > LocalSharedAttributeMap


1 /*
2  * Copyright 2002-2006 the original author or authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.springframework.webflow.core.collection;
17
18 import org.springframework.binding.collection.SharedMap;
19
20 /**
21  * An attribute map that exposes a mutex that application code can synchronize
22  * on. This class wraps another shared map in an attribute map.
23  * <p>
24  * The mutex can be used to serialize concurrent access to the shared map's
25  * contents by multiple threads.
26  *
27  * @author Keith Donald
28  */
29 public class LocalSharedAttributeMap extends LocalAttributeMap implements SharedAttributeMap {
30
31     /**
32      * Creates a new shared attribute map.
33      * @param sharedMap the shared map
34      */
35     public LocalSharedAttributeMap(SharedMap sharedMap) {
36         super(sharedMap);
37     }
38
39     public Object JavaDoc getMutex() {
40         return getSharedMap().getMutex();
41     }
42     
43     /**
44      * Returns the wrapped shared map.
45      */
46     protected SharedMap getSharedMap() {
47         return (SharedMap)getMapInternal();
48     }
49 }
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