    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
    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.model.MutableComponentModel;
    020    import org.apache.tapestry5.plastic.PlasticField;
    021    import org.apache.tapestry5.services.transform.InjectionProvider2;
    022
    023    import 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     */
    030    public 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    }