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Java > Open Source Codes > org > apache > tapestry > bean > LightweightBeanInitializer


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.bean;
16
17 import org.apache.hivemind.ApplicationRuntimeException;
18 import org.apache.hivemind.impl.BaseLocatable;
19 import org.apache.hivemind.util.Defense;
20 import org.apache.hivemind.util.PropertyUtils;
21 import org.apache.tapestry.IBeanProvider;
22
23 /**
24  * Performs "lightweight" initialization of a bean; this is based on a term (and code) from
25  * HiveMind, where the settings for a bean's properties are expressed as a single string.
26  *
27  * @author Howard M. Lewis Ship
28  * @since 4.0
29  */
30 public class LightweightBeanInitializer extends BaseLocatable implements IBeanInitializer
31 {
32     private final String JavaDoc _initializer;
33
34     public LightweightBeanInitializer(String JavaDoc initializer)
35     {
36         Defense.notNull(initializer, "initializer");
37
38         _initializer = initializer;
39     }
40
41     public void setBeanProperty(IBeanProvider provider, Object JavaDoc bean)
42     {
43         try
44         {
45             PropertyUtils.configureProperties(bean, _initializer);
46         }
47         catch (Exception JavaDoc ex)
48         {
49             throw new ApplicationRuntimeException(ex.getMessage(), getLocation(), ex);
50         }
51     }
52
53     /**
54      * Returns the initializer itself, rather than any single property name.
55      */
56     public String JavaDoc getPropertyName()
57     {
58         return _initializer;
59     }
60
61 }
62
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