DefaultGlobalStateObjectFactory


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 java.util.Collections  ;
18  import java.util.HashMap  ;
19  
20  import org.apache.hivemind.HiveMind;
21  
22  /**
23   * The default factory for the (default) global application state object. Creates and returns a
24   * synchronized HashMap, if no class name is specified. This duplicates behavior from Tapestry 3.0.
25   * 
26   * @author Howard M. Lewis Ship
27   * @since 4.0
28   */
29  public class DefaultGlobalStateObjectFactory extends NamedClassStateObjectFactory implements
30          StateObjectFactory
31  {
32  
33      public Object   createStateObject()
34      {
35          if (HiveMind.isBlank(getClassName()))
36              return Collections.synchronizedMap(new HashMap  ());
37  
38          return super.createStateObject();
39      }
40  }

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