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Hibernate's core ORM functionality

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
 */
package org.hibernate.jpa.event.internal;

import org.hibernate.annotations.common.reflection.ReflectionManager;
import org.hibernate.boot.spi.SessionFactoryOptions;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.jpa.event.spi.CallbackBuilder;
import org.hibernate.resource.beans.spi.ManagedBeanRegistry;

/**
 * The intent of this class is to use a lighter implementation
 * when JPA callbacks are disabled via
 * {@link org.hibernate.boot.spi.SessionFactoryOptions#areJPACallbacksEnabled()}
 */
public final class CallbacksFactory {

	public static CallbackRegistryImplementor buildCallbackRegistry(SessionFactoryImplementor sessionFactory) {
		if ( jpaCallBacksEnabled( sessionFactory ) ) {
			return new CallbackRegistryImpl();
		}
		else {
			return new EmptyCallbackRegistryImpl();
		}
	}

	public static CallbackBuilder buildCallbackBuilder(
			SessionFactoryImplementor sessionFactory,
			ReflectionManager reflectionManager) {
		if ( jpaCallBacksEnabled( sessionFactory ) ) {
			final ManagedBeanRegistry managedBeanRegistry = sessionFactory.getServiceRegistry().getService( ManagedBeanRegistry.class );
			return new CallbackBuilderLegacyImpl(
					managedBeanRegistry,
					reflectionManager
			);
		}
		else {
			return new EmptyCallbackBuilder();
		}
	}

	private static boolean jpaCallBacksEnabled(SessionFactoryImplementor sessionFactory) {
		SessionFactoryOptions options = sessionFactory.getSessionFactoryOptions();
		return options.areJPACallbacksEnabled();
	}

}