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


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.ApplicationRuntimeException;
18 import org.apache.hivemind.impl.BaseLocatable;
19
20 /**
21  * Simple state object factory that instantiates an instance of a class.
22  *
23  * @author Howard M. Lewis Ship
24  * @since 4.0
25  */
26 public class InstantiateClassStateObjectFactory extends BaseLocatable implements StateObjectFactory
27 {
28     private Class JavaDoc _objectClass;
29
30     public Object JavaDoc createStateObject()
31     {
32         try
33         {
34             return _objectClass.newInstance();
35         }
36         catch (Exception JavaDoc ex)
37         {
38             throw new ApplicationRuntimeException(StateMessages.unableToInstantiateObject(
39                     _objectClass,
40                     ex), getLocation(), ex);
41         }
42     }
43
44     public void setObjectClass(Class JavaDoc objectClass)
45     {
46         _objectClass = objectClass;
47     }
48 }
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