org.atemsource.atem.impl.jpa.SessionFactoryFactoryBean.java Source code

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Here is the source code for org.atemsource.atem.impl.jpa.SessionFactoryFactoryBean.java

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/*******************************************************************************
 * Stefan Meyer, 2012
 * 
 * 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.atemsource.atem.impl.jpa;

import java.lang.reflect.Field;
import java.lang.reflect.Proxy;

import javax.persistence.EntityManagerFactory;

import org.hibernate.SessionFactory;
import org.hibernate.ejb.EntityManagerFactoryImpl;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.orm.jpa.AbstractEntityManagerFactoryBean;

public class SessionFactoryFactoryBean implements FactoryBean, InitializingBean {
    private EntityManagerFactory entityManagerFactory;

    private SessionFactory sessionFactory;

    public void afterPropertiesSet() throws Exception {
        Object o = Proxy.getInvocationHandler(entityManagerFactory);
        Field field = null;
        try {
            field = o.getClass().getDeclaredField("targetEntityManagerFactory");
            if (!field.isAccessible()) {
                field.setAccessible(true);
            }
            sessionFactory = ((EntityManagerFactoryImpl) field.get(o)).getSessionFactory();
        } catch (NoSuchFieldException e) {
            field = o.getClass().getDeclaredField("entityManagerFactoryBean");
            if (!field.isAccessible()) {
                field.setAccessible(true);
            }
            AbstractEntityManagerFactoryBean factory = (AbstractEntityManagerFactoryBean) field.get(o);
            sessionFactory = ((EntityManagerFactoryImpl) factory.nativeEntityManagerFactory).getSessionFactory();
        }

    }

    public Object getObject() throws Exception {

        return sessionFactory;
    }

    public Class getObjectType() {

        return SessionFactory.class;
    }

    public boolean isSingleton() {
        return true;
    }

    public void setEntityManagerFactory(final EntityManagerFactory entityManagerFactory) {
        this.entityManagerFactory = entityManagerFactory;
    }

}