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Java > Open Source Codes > org > apache > tapestry > engine > state > StateObjectManagerImpl


1 // Copyright 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.engine.state;
16
17 import org.apache.hivemind.util.Defense;
18
19 /**
20  * @author Howard M. Lewis Ship
21  * @since 4.0
22  */
23 public class StateObjectManagerImpl implements StateObjectManager
24 {
25     private StateObjectPersistenceManager _persistenceManager;
26
27     private StateObjectFactory _factory;
28
29     private String JavaDoc _name;
30
31     public StateObjectManagerImpl(String JavaDoc name, StateObjectFactory factory,
32             StateObjectPersistenceManager persistenceManager)
33     {
34         Defense.notNull(name, "name");
35         Defense.notNull(factory, "factory");
36         Defense.notNull(persistenceManager, "persistenceManager");
37
38         _name = name;
39         _factory = factory;
40         _persistenceManager = persistenceManager;
41     }
42
43     public boolean exists()
44     {
45         return _persistenceManager.exists(_name);
46     }
47
48     public Object JavaDoc get()
49     {
50         return _persistenceManager.get(_name, _factory);
51     }
52
53     public void store(Object JavaDoc stateObject)
54     {
55         _persistenceManager.store(_name, stateObject);
56     }
57 }
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