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
015package org.apache.tapestry5.internal.transform;
016
017import org.apache.tapestry5.commons.ObjectLocator;
018import org.apache.tapestry5.internal.services.ComponentClassCache;
019import org.apache.tapestry5.ioc.annotations.InjectService;
020import org.apache.tapestry5.model.MutableComponentModel;
021import org.apache.tapestry5.plastic.PlasticClass;
022import org.apache.tapestry5.plastic.PlasticField;
023import org.apache.tapestry5.services.transform.ComponentClassTransformWorker2;
024import 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 */
031public 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}