org.hibernate.envers.RevisionType Maven / Gradle / Ivy

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, 2013, 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.envers;


/**
 * Type of the revision.
 *
 * @author Adam Warski (adam at warski dot org)
 */
public enum RevisionType {
	/**
	 * Indicates that the entity was added (persisted) at that revision.
	 */
	ADD( (byte) 0 ),
	/**
	 * Indicates that the entity was modified (one or more of its fields) at that revision.
	 */
	MOD( (byte) 1 ),
	/**
	 * Indicates that the entity was deleted (removed) at that revision.
	 */
	DEL( (byte) 2 );

	private Byte representation;

	RevisionType(byte representation) {
		this.representation = representation;
	}

	public Byte getRepresentation() {
		return representation;
	}

	public static RevisionType fromRepresentation(Object representation) {
		if ( representation == null || !(representation instanceof Byte) ) {
			return null;
		}

		switch ( (Byte) representation ) {
			case 0: {
				return ADD;
			}
			case 1: {
				return MOD;
			}
			case 2: {
				return DEL;
			}
			default: {
				throw new IllegalArgumentException( "Unknown representation: " + representation );
			}
		}
	}
}