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.InjectObjectWorker;
022    import org.apache.tapestry.services.InjectedValueProvider;
023    import org.apache.tapestry.spec.IComponentSpecification;
024    
025    /**
026     * Performs injection of objects, in much the same way as the <inject> element in a
027     * specification.
028     * 
029     * @author Howard M. Lewis Ship
030     * @since 4.0
031     * @see org.apache.tapestry.enhance.InjectObjectWorker
032     * @see org.apache.tapestry.annotations.InjectObject
033     */
034    
035    public class InjectObjectAnnotationWorker implements MethodAnnotationEnhancementWorker
036    {
037        final InjectObjectWorker _delegate;
038    
039        public InjectObjectAnnotationWorker()
040        {
041            this(new InjectObjectWorker());
042        }
043    
044        InjectObjectAnnotationWorker(InjectObjectWorker delegate)
045        {
046            _delegate = delegate;
047        }
048    
049        public void performEnhancement(EnhancementOperation op, IComponentSpecification spec,
050                Method method, Location location)
051        {
052            InjectObject io = method.getAnnotation(InjectObject.class);
053    
054            String object = io.value();
055    
056            String propertyName = AnnotationUtils.getPropertyName(method);
057    
058            _delegate.injectObject(op, object, propertyName, location);
059        }
060    
061        public void setProvider(InjectedValueProvider provider)
062        {
063            _delegate.setProvider(provider);
064        }
065    }