001    // Copyright 2005 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.tapestry.annotations;
016    
017    import java.lang.reflect.Method;
018    
019    import org.apache.hivemind.Location;
020    import org.apache.tapestry.enhance.EnhancementOperation;
021    import org.apache.tapestry.enhance.InjectAssetWorker;
022    import org.apache.tapestry.spec.IComponentSpecification;
023    
024    /**
025     * Injects an asset.
026     * 
027     * @author Howard M. Lewis Ship
028     * @since 4.0
029     * @see org.apache.tapestry.annotations.InjectAsset
030     * @see org.apache.tapestry.enhance.InjectAssetWorker
031     */
032    public class InjectAssetAnnotationWorker implements MethodAnnotationEnhancementWorker
033    {
034        InjectAssetWorker _delegate;
035    
036        InjectAssetAnnotationWorker(InjectAssetWorker delegate)
037        {
038            _delegate = delegate;
039        }
040    
041        public InjectAssetAnnotationWorker()
042        {
043            this(new InjectAssetWorker());
044        }
045    
046        public void performEnhancement(EnhancementOperation op, IComponentSpecification spec,
047                Method method, Location location)
048        {
049            InjectAsset as = method.getAnnotation(InjectAsset.class);
050    
051            String propertyName = AnnotationUtils.getPropertyName(method);
052    
053            _delegate.injectAsset(op, as.value(), propertyName, location);
054        }
055    
056    }