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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 .
 */
package org.hibernate.service.internal;

import java.util.List;
import java.util.ListIterator;

import org.hibernate.boot.spi.SessionFactoryOptions;
import org.hibernate.engine.config.spi.ConfigurationService;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.event.service.spi.EventListenerRegistry;
import org.hibernate.service.Service;
import org.hibernate.service.spi.Configurable;
import org.hibernate.service.spi.ServiceBinding;
import org.hibernate.service.spi.ServiceInitiator;
import org.hibernate.service.spi.ServiceRegistryImplementor;
import org.hibernate.service.spi.SessionFactoryServiceInitiator;
import org.hibernate.service.spi.SessionFactoryServiceInitiatorContext;
import org.hibernate.service.spi.SessionFactoryServiceRegistry;

/**
 * @author Steve Ebersole
 */
public class SessionFactoryServiceRegistryImpl
		extends AbstractServiceRegistryImpl
		implements SessionFactoryServiceRegistry, SessionFactoryServiceInitiatorContext {

	private final SessionFactoryOptions sessionFactoryOptions;
	private final SessionFactoryImplementor sessionFactory;
	private EventListenerRegistry cachedEventListenerRegistry;

	@SuppressWarnings( {"unchecked"})
	public SessionFactoryServiceRegistryImpl(
			ServiceRegistryImplementor parent,
			List initiators,
			List providedServices,
			SessionFactoryImplementor sessionFactory,
			SessionFactoryOptions sessionFactoryOptions) {
		super( parent );

		this.sessionFactory = sessionFactory;
		this.sessionFactoryOptions = sessionFactoryOptions;

		// for now, just use the standard initiator list
		for ( SessionFactoryServiceInitiator initiator : initiators ) {
			// create the bindings up front to help identify to which registry services belong
			createServiceBinding( initiator );
		}

		for ( ProvidedService providedService : providedServices ) {
			createServiceBinding( providedService );
		}
	}

	@Override
	public  R initiateService(ServiceInitiator serviceInitiator) {
		SessionFactoryServiceInitiator sessionFactoryServiceInitiator = (SessionFactoryServiceInitiator) serviceInitiator;
		return sessionFactoryServiceInitiator.initiateService( this );
	}

	@Override
	public  void configureService(ServiceBinding serviceBinding) {
		if ( Configurable.class.isInstance( serviceBinding.getService() ) ) {
			( (Configurable) serviceBinding.getService() ).configure( getService( ConfigurationService.class ).getSettings() );
		}
	}

	@Override
	public SessionFactoryImplementor getSessionFactory() {
		return sessionFactory;
	}

	@Override
	public SessionFactoryOptions getSessionFactoryOptions() {
		return sessionFactoryOptions;
	}

	@Override
	public ServiceRegistryImplementor getServiceRegistry() {
		return this;
	}

	@Override
	public  R getService(Class serviceRole) {

		//HHH-11051 cache EventListenerRegistry
		if ( serviceRole.equals( EventListenerRegistry.class ) ) {
			if ( cachedEventListenerRegistry == null ) {
				cachedEventListenerRegistry = (EventListenerRegistry) super.getService( serviceRole );
			}
			return (R) cachedEventListenerRegistry;
		}

		return super.getService( serviceRole );
	}

	@Override
	public synchronized void destroy() {
		super.destroy();
		this.cachedEventListenerRegistry = null;
	}

}