PersistenceUnitConfiguration.java

package org.needle4j.db.configuration;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

/**
 * Creates an {@link EntityManagerFactory} and {@link EntityManager} for a named
 * persistence unit.
 */
class PersistenceUnitConfiguration implements PersistenceConfiguration {

    private final EntityManagerFactory factory;
    private final EntityManager entityManager;

    /**
     * Creates an {@link EntityManagerFactory} and {@link EntityManager} for the
     * named persistence unit.
     * 
     * @param persistenceUnitName
     *            the name of the persistence unit
     */
    public PersistenceUnitConfiguration(String persistenceUnitName) {
        factory = Persistence.createEntityManagerFactory(persistenceUnitName);
        entityManager = EntityManagerProxyFactory.createProxy(factory.createEntityManager());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public EntityManager getEntityManager() {
        return entityManager;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public EntityManagerFactory getEntityManagerFactory() {
        return factory;
    }

}