Coverage Report - org.apache.tapestry.enhance.InjectMessagesWorker
 
Classes in this File Line Coverage Branch Coverage Complexity
InjectMessagesWorker
0%
0/25
0%
0/6
1.25
 
 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.enhance;
 16  
 
 17  
 import java.lang.reflect.Modifier;
 18  
 
 19  
 import org.apache.hivemind.ErrorLog;
 20  
 import org.apache.hivemind.Location;
 21  
 import org.apache.hivemind.Messages;
 22  
 import org.apache.hivemind.service.BodyBuilder;
 23  
 import org.apache.hivemind.service.MethodSignature;
 24  
 import org.apache.hivemind.util.Defense;
 25  
 import org.apache.tapestry.services.ComponentMessagesSource;
 26  
 import org.apache.tapestry.spec.IComponentSpecification;
 27  
 
 28  
 /**
 29  
  * Injects the read-only {@link org.apache.tapestry.IComponent#getMessages() messages}property into
 30  
  * all components.
 31  
  * 
 32  
  * @author Howard M. Lewis Ship
 33  
  * @since 4.0
 34  
  */
 35  0
 public class InjectMessagesWorker implements EnhancementWorker
 36  
 {
 37  0
     final String _messagesProperty = "messages";
 38  
 
 39  0
     final MethodSignature _methodSignature = new MethodSignature(Messages.class, "getMessages",
 40  
             null, null);
 41  
 
 42  
     private ErrorLog _errorLog;
 43  
 
 44  
     private ComponentMessagesSource _componentMessagesSource;
 45  
     
 46  
     public void performEnhancement(EnhancementOperation op, IComponentSpecification spec)
 47  
     {
 48  0
         Location location = spec.getLocation();
 49  
 
 50  
         try
 51  
         {
 52  0
             injectMessages(op, location);
 53  
         }
 54  0
         catch (Exception ex)
 55  
         {
 56  0
             _errorLog.error(EnhanceMessages.errorAddingProperty(_messagesProperty, op
 57  
                     .getBaseClass(), ex), location, ex);
 58  0
         }
 59  0
     }
 60  
 
 61  
     public void injectMessages(EnhancementOperation op, Location location)
 62  
     {
 63  0
         Defense.notNull(op, "op");
 64  
 
 65  0
         op.claimReadonlyProperty(_messagesProperty);
 66  
 
 67  0
         String sourceField = op.addInjectedField(
 68  
                 "_$componentMessagesSource",
 69  
                 ComponentMessagesSource.class,
 70  
                 _componentMessagesSource);
 71  
 
 72  0
         op.addField("_$messages", Messages.class);
 73  
 
 74  0
         BodyBuilder builder = new BodyBuilder();
 75  0
         builder.begin();
 76  0
         builder.addln("if (_$messages == null)");
 77  0
         builder.addln("  _$messages = {0}.getMessages(this);", sourceField);
 78  0
         builder.addln("return _$messages;");
 79  0
         builder.end();
 80  
 
 81  0
         op.addMethod(Modifier.PUBLIC, _methodSignature, builder.toString(), location);
 82  0
     }
 83  
 
 84  
     public void setComponentMessagesSource(ComponentMessagesSource componentMessagesSource)
 85  
     {
 86  0
         _componentMessagesSource = componentMessagesSource;
 87  0
     }
 88  
 
 89  
     public void setErrorLog(ErrorLog errorLog)
 90  
     {
 91  0
         _errorLog = errorLog;
 92  0
     }
 93  
 }