Coverage Report - org.apache.tapestry.enhance.AbstractPropertyWorker
 
Classes in this File Line Coverage Branch Coverage Complexity
AbstractPropertyWorker
0%
0/25
0%
0/6
1.667
 
 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.enhance;
 16  
 
 17  
 import java.util.Iterator;
 18  
 
 19  
 import org.apache.hivemind.ErrorLog;
 20  
 import org.apache.hivemind.Location;
 21  
 import org.apache.tapestry.IComponent;
 22  
 import org.apache.tapestry.event.PageDetachListener;
 23  
 import org.apache.tapestry.spec.IComponentSpecification;
 24  
 
 25  
 /**
 26  
  * No, this class isn't abstract ... this worker locates abstract properties in the base component
 27  
  * class and provides a concrete implementation for them in the enhanced class.
 28  
  * 
 29  
  * @author Howard M. Lewis Ship
 30  
  * @since 4.0
 31  
  */
 32  0
 public class AbstractPropertyWorker implements EnhancementWorker
 33  
 {
 34  
     private ErrorLog _errorLog;
 35  
 
 36  
     public void performEnhancement(EnhancementOperation op, IComponentSpecification spec)
 37  
     {
 38  0
         Location location = spec.getLocation();
 39  
 
 40  0
         Iterator i = op.findUnclaimedAbstractProperties().iterator();
 41  
 
 42  0
         while (i.hasNext())
 43  
         {
 44  0
             String name = (String) i.next();
 45  
 
 46  
             try
 47  
             {
 48  0
                 createProperty(op, name, location);
 49  
             }
 50  0
             catch (Exception ex)
 51  
             {
 52  0
                 _errorLog.error(
 53  
                         EnhanceMessages.errorAddingProperty(name, op.getBaseClass(), ex),
 54  
                         location,
 55  
                         ex);
 56  0
             }
 57  0
         }
 58  0
     }
 59  
 
 60  
     private void createProperty(EnhancementOperation op, String name, Location location)
 61  
     {
 62  
         // This won't be null because its always for existing properties.
 63  
 
 64  0
         Class propertyType = op.getPropertyType(name);
 65  
 
 66  0
         String fieldName = "_$" + name;
 67  0
         String defaultFieldName = fieldName + "$defaultValue";
 68  
 
 69  0
         op.addField(fieldName, propertyType);
 70  0
         op.addField(defaultFieldName, propertyType);
 71  
 
 72  0
         EnhanceUtils.createSimpleAccessor(op, fieldName, name, propertyType, location);
 73  0
         EnhanceUtils.createSimpleMutator(op, fieldName, name, propertyType, location);
 74  
 
 75  
         // Copy the real attribute into the default attribute inside finish load
 76  
         // (allowing a default value to be set inside finishLoad()).
 77  
 
 78  0
         op.extendMethodImplementation(
 79  0
                 IComponent.class,
 80  
                 EnhanceUtils.FINISH_LOAD_SIGNATURE,
 81  
                 defaultFieldName + " = " + fieldName + ";");
 82  
 
 83  
         // On page detach, restore the attribute to its default value.
 84  
 
 85  0
         op.extendMethodImplementation(
 86  
                 PageDetachListener.class,
 87  
                 EnhanceUtils.PAGE_DETACHED_SIGNATURE,
 88  
                 fieldName + " = " + defaultFieldName + ";");
 89  
 
 90  
         // This is not all that necessary, but is proper.
 91  
 
 92  0
         op.claimProperty(name);
 93  0
     }
 94  
 
 95  
     public void setErrorLog(ErrorLog errorLog)
 96  
     {
 97  0
         _errorLog = errorLog;
 98  0
     }
 99  
 }