/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.jpa.container;
import java.io.Serializable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import javax.persistence.EntityManager;
/**
* Handle method execution delegation to a wrapped object using the passed entity manager to obtain the target
* invocation target. Forked from Emmanuel's org.jboss.ejb3.entity.hibernate.TransactionScopedSessionInvocationHandler.
*
* @author Emmanuel Bernard
* @author Scott Marlow
*/
public class EntityManagerUnwrappedTargetInvocationHandler implements InvocationHandler, Serializable {
private static final long serialVersionUID = 5254527687L;
private Class<?> wrappedClass;
private EntityManager targetEntityManager;
public EntityManagerUnwrappedTargetInvocationHandler() {
}
public EntityManagerUnwrappedTargetInvocationHandler(EntityManager targetEntityManager, Class<?> wrappedClass) {
this.targetEntityManager = targetEntityManager;
this.wrappedClass = wrappedClass;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if ("close".equals(method.getName())) {
throw new IllegalStateException("Illegal to call this method from injected, managed EntityManager");
} else {
//catch all
try {
return method.invoke(getWrappedObject(), args);
} catch (InvocationTargetException e) {
if (e.getTargetException() instanceof RuntimeException) {
throw (RuntimeException) e.getTargetException();
} else {
throw e;
}
}
}
}
private Object getWrappedObject() {
return targetEntityManager.unwrap(wrappedClass);
}
}