001// Copyright 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.model.MutableComponentModel;
020import org.apache.tapestry5.plastic.PlasticField;
021import org.apache.tapestry5.services.transform.InjectionProvider2;
022
023import javax.inject.Named;
024
025/**
026 * Processes the combination of {@link javax.inject.Inject} and {@link javax.inject.Named} annotations.
027 *
028 * @since 5.3
029 */
030public class InjectNamedProvider implements InjectionProvider2
031{
032    private final ObjectLocator locator;
033
034    private final ComponentClassCache cache;
035
036    public InjectNamedProvider(ObjectLocator locator, ComponentClassCache cache)
037    {
038        this.locator = locator;
039        this.cache = cache;
040    }
041
042    public boolean provideInjection(PlasticField field, ObjectLocator locator, MutableComponentModel componentModel)
043    {
044        if (!field.hasAnnotation(Named.class))
045        {
046            return false;
047        }
048
049        Named annotation = field.getAnnotation(Named.class);
050
051        Class fieldType = cache.forName(field.getTypeName());
052
053        Object service = this.locator.getService(annotation.value(), fieldType);
054
055        field.inject(service);
056
057        return true;
058    }
059}