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
015package org.apache.tapestry5.internal.jpa;
016
017import org.apache.tapestry5.ioc.MethodAdviceReceiver;
018import org.apache.tapestry5.jpa.EntityManagerManager;
019import org.apache.tapestry5.jpa.JpaTransactionAdvisor;
020import org.apache.tapestry5.jpa.annotations.CommitAfter;
021import org.apache.tapestry5.plastic.MethodAdvice;
022
023import javax.persistence.PersistenceContext;
024import java.lang.reflect.Method;
025
026public class JpaTransactionAdvisorImpl implements JpaTransactionAdvisor
027{
028    private final EntityManagerManager manager;
029
030    private final MethodAdvice shared;
031
032
033    public JpaTransactionAdvisorImpl(EntityManagerManager manager)
034    {
035        this.manager = manager;
036
037        shared = new CommitAfterMethodAdvice(manager, null);
038    }
039
040    public void addTransactionCommitAdvice(final MethodAdviceReceiver receiver)
041    {
042        for (final Method m : receiver.getInterface().getMethods())
043        {
044            if (m.getAnnotation(CommitAfter.class) != null)
045            {
046                PersistenceContext annotation = receiver.getMethodAnnotation(m, PersistenceContext.class);
047
048                MethodAdvice advice =
049                        annotation == null ? shared : new CommitAfterMethodAdvice(manager, annotation);
050
051                receiver.adviseMethod(m, advice);
052            }
053        }
054
055    }
056
057}