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Java > Open Source Codes > org > apache > hivemind > schema > rules > SetPropertyRule


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.hivemind.schema.rules;
16
17 import org.apache.commons.logging.Log;
18 import org.apache.commons.logging.LogFactory;
19 import org.apache.hivemind.Element;
20 import org.apache.hivemind.ErrorHandler;
21 import org.apache.hivemind.schema.SchemaProcessor;
22 import org.apache.hivemind.schema.Translator;
23 import org.apache.hivemind.util.PropertyUtils;
24
25 /**
26  * Used to set a property of an object to a literal value.
27  *
28  * @author Howard Lewis Ship
29  */
30 public class SetPropertyRule extends BaseRule
31 {
32     private static final Log LOG = LogFactory.getLog(SetPropertyRule.class);
33
34     private String JavaDoc _propertyName;
35     private String JavaDoc _value;
36     private Translator _smartTranslator;
37
38     public void begin(SchemaProcessor processor, Element element)
39     {
40         String JavaDoc value = RuleUtils.processText(processor, element, _value);
41
42         Object JavaDoc target = processor.peek();
43
44         try
45         {
46             if (_smartTranslator == null)
47                 _smartTranslator = RuleUtils.getTranslator(processor, "smart");
48
49             Class JavaDoc propertyType = PropertyUtils.getPropertyType(target, _propertyName);
50
51             Object JavaDoc finalValue =
52                 _smartTranslator.translate(
53                     processor.getContributingModule(),
54                     propertyType,
55                     value,
56                     element.getLocation());
57
58             PropertyUtils.write(target, _propertyName, finalValue);
59         }
60         catch (Exception JavaDoc ex)
61         {
62             ErrorHandler eh = processor.getContributingModule().getErrorHandler();
63
64             String JavaDoc message = RulesMessages.unableToSetProperty(_propertyName, target, ex);
65
66             eh.error(LOG, message, element.getLocation(), ex);
67         }
68
69     }
70
71     public void setPropertyName(String JavaDoc string)
72     {
73         _propertyName = string;
74     }
75
76     public void setValue(String JavaDoc string)
77     {
78         _value = string;
79     }
80
81     public String JavaDoc getPropertyName()
82     {
83         return _propertyName;
84     }
85
86     public String JavaDoc getValue()
87     {
88         return _value;
89     }
90
91 }
92
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