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Java > Open Source Codes > org > apache > commons > beanutils > ConvertingWrapDynaBean


1 /*
2  * Copyright 2001-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.commons.beanutils;
18
19
20 /**
21  * <p>Implementation of <code>DynaBean</code> that wraps a standard JavaBean
22  * instance, so that DynaBean APIs can be used to access its properties,
23  * though this implementation allows type conversion to occur when properties are set.
24  * This means that (say) Strings can be passed in as values in setter methods and
25  * this DynaBean will convert them to the correct primitive data types.</p>
26  *
27  * <p><strong>IMPLEMENTATION NOTE</strong> - This implementation does not
28  * support the <code>contains()</code> and <code>remove()</code> methods.</p>
29  *
30  * @author James Strachan
31  * @version $Revision: 1.3 $ $Date: 2002/01/23 22:35:58 $
32  */
33
34 public class ConvertingWrapDynaBean extends WrapDynaBean {
35
36
37
38     /**
39      * Construct a new <code>DynaBean</code> associated with the specified
40      * JavaBean instance.
41      *
42      * @param instance JavaBean instance to be wrapped
43      */
44     public ConvertingWrapDynaBean(Object JavaDoc instance) {
45
46         super(instance);
47
48     }
49
50
51     /**
52      * Set the value of the property with the specified name
53      * performing any type conversions if necessary. So this method
54      * can accept String values for primitive numeric data types for example.
55      *
56      * @param name Name of the property whose value is to be set
57      * @param value Value to which this property is to be set
58      *
59      * @exception ConversionException if the specified value cannot be
60      * converted to the type required for this property
61      * @exception IllegalArgumentException if there is no property
62      * of the specified name
63      * @exception NullPointerException if an attempt is made to set a
64      * primitive property to null
65      */
66     public void set(String JavaDoc name, Object JavaDoc value) {
67
68         try {
69             BeanUtils.copyProperty(instance, name, value);
70         } catch (Throwable JavaDoc t) {
71             throw new IllegalArgumentException JavaDoc
72                     ("Property '" + name + "' has no write method");
73         }
74
75     }
76 }
77
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