org.apache.tapestry5.internal.jpa.PersistenceContextWorker Maven / Gradle / Ivy
// Copyright 2011 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry5.internal.jpa;
import org.apache.tapestry5.internal.transform.ReadOnlyComponentFieldConduit;
import org.apache.tapestry5.jpa.EntityManagerManager;
import org.apache.tapestry5.model.MutableComponentModel;
import org.apache.tapestry5.plastic.InstanceContext;
import org.apache.tapestry5.plastic.PlasticClass;
import org.apache.tapestry5.plastic.PlasticField;
import org.apache.tapestry5.services.transform.ComponentClassTransformWorker2;
import org.apache.tapestry5.services.transform.TransformationSupport;
import javax.persistence.PersistenceContext;
public class PersistenceContextWorker implements ComponentClassTransformWorker2
{
private final EntityManagerManager entityManagerManager;
public PersistenceContextWorker(final EntityManagerManager entityManagerManager)
{
this.entityManagerManager = entityManagerManager;
}
@Override
public void transform(PlasticClass plasticClass, TransformationSupport support, MutableComponentModel model)
{
for (final PlasticField field : plasticClass
.getFieldsWithAnnotation(PersistenceContext.class))
{
final PersistenceContext annotation = field.getAnnotation(PersistenceContext.class);
field.claim(annotation);
field.setConduit(new ReadOnlyComponentFieldConduit(plasticClass.getClassName(), field.getName())
{
@Override
public Object get(Object instance, InstanceContext context)
{
return JpaInternalUtils.getEntityManager(entityManagerManager, annotation);
}
});
}
}
}