    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}