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Java > Open Source Codes > org > apache > tapestry > services > impl > PropertyObjectProvider


1 // Copyright 2004, 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.services.impl;
16
17 import org.apache.hivemind.ApplicationRuntimeException;
18 import org.apache.hivemind.Location;
19 import org.apache.hivemind.internal.Module;
20 import org.apache.hivemind.service.ObjectProvider;
21 import org.apache.tapestry.engine.IPropertySource;
22
23 /**
24  * An implementation of {@link org.apache.hivemind.service.ObjectProvider}
25  * that gets the actual value from the
26  * <code>tapestry.GlobalPropertySource</code> service.
27  *
28  * @author Howard Lewis Ship
29  * @since 4.0
30  */
31 public class PropertyObjectProvider implements ObjectProvider
32 {
33     private IPropertySource _source;
34
35     /**
36      * Gets the value; the locator is the key passed to
37      * {@link IPropertySource#getPropertyValue(String)}.
38      */
39     public Object JavaDoc provideObject(
40         Module contributingModule,
41         Class JavaDoc propertyType,
42         String JavaDoc locator,
43         Location location)
44     {
45         try
46         {
47             return _source.getPropertyValue(locator);
48         }
49         catch (Exception JavaDoc ex)
50         {
51             throw new ApplicationRuntimeException(ex.getMessage(), location, ex);
52         }
53     }
54
55     public void setSource(IPropertySource source)
56     {
57         _source = source;
58     }
59
60 }
61
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