001    // Copyright 2009, 2010, 2011 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    // http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.internal.transform;
016    
017    import org.apache.tapestry5.internal.services.ComponentClassCache;
018    import org.apache.tapestry5.ioc.ObjectLocator;
019    import org.apache.tapestry5.ioc.annotations.InjectService;
020    import org.apache.tapestry5.model.MutableComponentModel;
021    import org.apache.tapestry5.plastic.PlasticClass;
022    import org.apache.tapestry5.plastic.PlasticField;
023    import org.apache.tapestry5.services.transform.ComponentClassTransformWorker2;
024    import org.apache.tapestry5.services.transform.TransformationSupport;
025    
026    /**
027     * Processes the {@link org.apache.tapestry5.ioc.annotations.InjectService} annotation.
028     *
029     * @since 5.1.0.0
030     */
031    public class InjectServiceWorker implements ComponentClassTransformWorker2
032    {
033        private final ObjectLocator locator;
034    
035        private final ComponentClassCache cache;
036    
037        public InjectServiceWorker(ObjectLocator locator, ComponentClassCache cache)
038        {
039            this.locator = locator;
040            this.cache = cache;
041        }
042    
043        public void transform(PlasticClass plasticClass, TransformationSupport support, MutableComponentModel model)
044        {
045            for (PlasticField field : plasticClass.getFieldsWithAnnotation(InjectService.class))
046            {
047                InjectService annotation = field.getAnnotation(InjectService.class);
048    
049                field.claim(annotation);
050    
051                Class fieldType = cache.forName(field.getTypeName());
052    
053                Object service = locator.getService(annotation.value(), fieldType);
054    
055                field.inject(service);
056            }
057        }
058    }