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    }