001    // Copyright 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.jpa;
016    
017    import org.apache.tapestry5.jpa.EntityManagerManager;
018    import org.apache.tapestry5.jpa.annotations.CommitAfter;
019    import org.apache.tapestry5.model.MutableComponentModel;
020    import org.apache.tapestry5.plastic.MethodAdvice;
021    import org.apache.tapestry5.plastic.PlasticClass;
022    import org.apache.tapestry5.plastic.PlasticMethod;
023    import org.apache.tapestry5.services.transform.ComponentClassTransformWorker2;
024    import org.apache.tapestry5.services.transform.TransformationSupport;
025    
026    import javax.persistence.PersistenceContext;
027    
028    public class CommitAfterWorker implements ComponentClassTransformWorker2
029    {
030    
031        private final MethodAdvice shared;
032    
033        private final EntityManagerManager manager;
034    
035        public CommitAfterWorker(EntityManagerManager manager)
036        {
037            this.manager = manager;
038    
039            shared = new CommitAfterMethodAdvice(manager, null);
040        }
041    
042        public void transform(PlasticClass plasticClass, TransformationSupport support, MutableComponentModel model)
043        {
044            for (final PlasticMethod method : plasticClass
045                    .getMethodsWithAnnotation(CommitAfter.class))
046            {
047                PersistenceContext annotation = method.getAnnotation(PersistenceContext.class);
048    
049                MethodAdvice advice = annotation == null ? shared : new CommitAfterMethodAdvice(manager, annotation);
050    
051                method.addAdvice(advice);
052            }
053        }
054    }