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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.tuscany.service.openjpa;
import java.lang.reflect.Member;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceContext;
import org.apache.tuscany.spi.ObjectFactory;
import org.apache.tuscany.spi.annotation.Autowire;
import org.apache.tuscany.spi.component.CompositeComponent;
import org.apache.tuscany.spi.component.TargetException;
import org.apache.tuscany.spi.deployer.DeploymentContext;
import org.apache.tuscany.spi.implementation.java.AbstractPropertyProcessor;
import org.apache.tuscany.spi.implementation.java.ImplementationProcessorService;
import org.apache.tuscany.spi.implementation.java.JavaMappedProperty;
import org.apache.tuscany.spi.implementation.java.ProcessingException;
import org.apache.tuscany.spi.wire.InboundWire;
/**
* Evaluates constructors, methods, and fields annotated with {@link PersistenceContext }, creating a mapped property
* that will inject an {@link EntityManager} on an implementation instance.
*
* @version $Rev$ $Date$
*/
public class EntityManagerProcessor extends AbstractPropertyProcessor<PersistenceContext> {
public EntityManagerProcessor(@Autowire ImplementationProcessorService service) {
super(PersistenceContext.class, service);
}
protected String getName(PersistenceContext annotation) {
String name = annotation.unitName();
if (name == null) {
return "_defaultJPAPersistenceUnit";
}
return name;
}
protected <T> JavaMappedProperty<T> createProperty(String name,
Class<T> javaType,
Member member) throws ProcessingException {
if (!EntityManager.class.equals(javaType)) {
throw new InvalidInjectionSite("Injection site must by of type " + EntityManager.class.getName(), name);
}
return super.createProperty(name, javaType, member);
}
@SuppressWarnings("unchecked")
protected <T> void initProperty(JavaMappedProperty<T> property,
PersistenceContext annotation,
CompositeComponent parent,
DeploymentContext context) throws ProcessingException {
EntityManagerFactory emf;
try {
InboundWire wire = parent.resolveSystemAutowire(EntityManagerFactory.class);
if (wire == null) {
throw new EntityManagerFactoryNotConfiguredException();
}
Object o = wire.getTargetService();
assert o instanceof EntityManagerFactory;
emf = (EntityManagerFactory) o;
} catch (TargetException e) {
throw new ProcessingException(e);
}
ObjectFactory factory = new EntityManagerObjectFactory(emf);
property.setDefaultValueFactory(factory);
}
}
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