// Copyright 2009 The Apache Software Foundation

 //

 // Licensed under the Apache License, Version 2.0 (the "License");

 // you may not use this file except in compliance with the License.

 // You may obtain a copy of the License at

 //

 //     http://www.apache.org/licenses/LICENSE-2.0

 //

 // Unless required by applicable law or agreed to in writing, software

 // distributed under the License is distributed on an "AS IS" BASIS,

 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 // See the License for the specific language governing permissions and

 // limitations under the License.

 package org.apache.tapestry5.internal.transform;

 import org.apache.tapestry5.internal.services.ComponentClassCache;

 import org.apache.tapestry5.ioc.ObjectLocator;

 import org.apache.tapestry5.ioc.annotations.InjectService;

 import org.apache.tapestry5.model.MutableComponentModel;

 import org.apache.tapestry5.services.ClassTransformation;

 import org.apache.tapestry5.services.ComponentClassTransformWorker;

 import java.util.List;

 /**

  * Processes the {@link org.apache.tapestry5.ioc.annotations.InjectService} annotation.

  *

  * @since 5.1.0.0

  */

 public class InjectServiceWorker implements ComponentClassTransformWorker

 {

     private final ObjectLocator locator;

     private final ComponentClassCache cache;

     public InjectServiceWorker(ObjectLocator locator, ComponentClassCache cache)

     {

         this.locator = locator;

         this.cache = cache;

     }

     public void transform(ClassTransformation transformation, MutableComponentModel model)

     {

         List<String> names = transformation.findFieldsWithAnnotation(InjectService.class);

         if (names.isEmpty()) return;

         for (String name : names)

         {

             InjectService annotation = transformation.getFieldAnnotation(name, InjectService.class);

             String typeName = transformation.getFieldType(name);

             Class fieldType = cache.forName(typeName);

             Object service = locator.getService(annotation.value(), fieldType);

             transformation.injectField(name, service);

             transformation.claimField(name, annotation);

         }

     }

 }