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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.persistence.common;
import java.lang.reflect.Field;
import java.net.URI;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
import org.osoa.sca.annotations.Reference;
import org.apache.tuscany.spi.ObjectFactory;
import org.apache.tuscany.spi.component.AtomicComponent;
import org.apache.tuscany.spi.component.RegistrationException;
import org.apache.tuscany.spi.component.TargetException;
import org.apache.tuscany.spi.deployer.DeploymentContext;
import org.apache.tuscany.spi.idl.InvalidServiceContractException;
import org.apache.tuscany.spi.idl.java.InterfaceJavaIntrospector;
import org.apache.tuscany.spi.implementation.java.ImplementationProcessorExtension;
import org.apache.tuscany.spi.implementation.java.JavaMappedProperty;
import org.apache.tuscany.spi.implementation.java.JavaMappedReference;
import org.apache.tuscany.spi.implementation.java.JavaMappedService;
import org.apache.tuscany.spi.implementation.java.PojoComponentType;
import org.apache.tuscany.spi.implementation.java.ProcessingException;
import org.apache.tuscany.spi.implementation.java.Resource;
import org.apache.tuscany.spi.model.ServiceContract;
import org.apache.tuscany.core.component.ComponentManager;
/**
* Annotation processor for injecting <code>PersistenceUnit</code> annotations on properties.
*
* @version $Rev$ $Date$
*/
public class PersistenceUnitProcessor extends ImplementationProcessorExtension {
/**
* Persistence unit builder
*/
private PersistenceUnitBuilder builder = new DefaultPersistenceUnitBuilder();
private ComponentManager componentManager;
private InterfaceJavaIntrospector introspector;
@Reference
public void setComponentManager(ComponentManager componentManager) {
this.componentManager = componentManager;
}
@Reference
public void setIntrospector(InterfaceJavaIntrospector introspector) {
this.introspector = introspector;
}
@SuppressWarnings({"unchecked"})
public void visitField(Field field,
PojoComponentType<JavaMappedService, JavaMappedReference, JavaMappedProperty<?>> type,
DeploymentContext context) throws ProcessingException {
PersistenceUnit annotation = field.getAnnotation(PersistenceUnit.class);
if (annotation == null) {
return;
}
String unitName = annotation.unitName();
URI unitUri = context.getComponentId().resolve(unitName);
AtomicComponent component = (AtomicComponent) componentManager.getComponent(unitUri);
EntityManagerFactory emf;
if (component == null) {
emf = builder.newEntityManagerFactory(unitName, context.getClassLoader());
try {
ServiceContract<EntityManagerFactory> contract =
(ServiceContract) introspector.introspect(EntityManagerFactory.class);
componentManager.registerJavaObject(unitUri, contract, emf);
} catch (RegistrationException e) {
throw new ProcessingException(e);
} catch (InvalidServiceContractException e) {
throw new ProcessingException(e);
}
} else {
try {
emf = (EntityManagerFactory) component.getTargetInstance();
} catch (TargetException e) {
throw new ProcessingException(e);
}
}
ObjectFactory factory = new EmfObjectFactory(emf);
Resource resource = new Resource(unitName, field.getType(), field);
resource.setObjectFactory(factory);
type.add(resource);
}
private class EmfObjectFactory implements ObjectFactory<EntityManagerFactory> {
private EntityManagerFactory emf;
public EmfObjectFactory(EntityManagerFactory emf) {
this.emf = emf;
}
public EntityManagerFactory getInstance() {
return emf;
}
}
}
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