CreatePropertyWorker


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.test;
16  
17  import org.apache.tapestry.enhance.EnhanceUtils;
18  import org.apache.tapestry.enhance.EnhancementOperation;
19  import org.apache.tapestry.enhance.EnhancementWorker;
20  import org.apache.tapestry.spec.IComponentSpecification;
21  
22  /**
23   * Forces the creation of a property, overrriding an existing implementation. Allows test code to
24   * set the specification and messages properties of components.
25   * 
26   * @author Howard M. Lewis Ship
27   * @since 4.0
28   */
29  public class CreatePropertyWorker implements EnhancementWorker
30  {
31      private String   _propertyName;
32  
33      public CreatePropertyWorker(String   propertyName)
34      {
35          _propertyName = propertyName;
36      }
37  
38      public void performEnhancement(EnhancementOperation op, IComponentSpecification spec)
39      {
40          Class   propertyType = EnhanceUtils.extractPropertyType(op, _propertyName, null);
41  
42          op.claimProperty(_propertyName);
43  
44          String   field = "_$" + _propertyName;
45  
46          op.addField(field, propertyType);
47  
48          EnhanceUtils.createSimpleAccessor(op, field, _propertyName, propertyType);
49  
50          EnhanceUtils.createSimpleMutator(op, field, _propertyName, propertyType);
51      }
52  }
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