/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008-2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.event.spi;

import java.io.Serializable;

import org.hibernate.persister.entity.EntityPersister;

/**
 * Represents an operation we are about to perform against the database.
 *
 * @author Steve Ebersole
 */
public abstract class AbstractPreDatabaseOperationEvent extends AbstractEvent {
	private final Object entity;
	private final Serializable id;
	private final EntityPersister persister;

	/**
	 * Constructs an event containing the pertinent information.
	 *
	 * @param source The session from which the event originated.
	 * @param entity The entity to be invloved in the database operation.
	 * @param id The entity id to be invloved in the database operation.
	 * @param persister The entity's persister.
	 */
	public AbstractPreDatabaseOperationEvent(
			EventSource source,
			Object entity,
			Serializable id,
			EntityPersister persister) {
		super( source );
		this.entity = entity;
		this.id = id;
		this.persister = persister;
	}

	/**
	 * Retrieves the entity involved in the database operation.
	 *
	 * @return The entity.
	 */
	public Object getEntity() {
		return entity;
	}

	/**
	 * The id to be used in the database operation.
	 *
	 * @return The id.
	 */
	public Serializable getId() {
		return id;
	}

	/**
	 * The persister for the {@link #getEntity entity}.
	 *
	 * @return The entity persister.
	 */
	public EntityPersister getPersister() {
		return persister;
	}

	/**
	 * Getter for property 'source'.  This is the session from which the event
	 * originated.
	 * <p/>
	 * Some of the pre-* events had previous exposed the event source using
	 * getSource() because they had not originally extended from
	 * {@link AbstractEvent}.
	 *
	 * @return Value for property 'source'.
	 * @deprecated Use {@link #getSession} instead
	 */
	public EventSource getSource() {
		return getSession();
	}
}