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
015package org.apache.tapestry.annotations;
016
017import java.lang.reflect.Method;
018
019import org.apache.hivemind.Location;
020import org.apache.tapestry.enhance.EnhancementOperation;
021import org.apache.tapestry.enhance.InjectObjectWorker;
022import org.apache.tapestry.services.InjectedValueProvider;
023import 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
035public 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}