/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
 *
 * 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.entities;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.envers.RevisionType;
import org.hibernate.type.IntegerType;
import org.hibernate.usertype.UserType;

/**
 * A hibernate type for the {@link RevisionType} enum.
 * @author Adam Warski (adam at warski dot org)
 */
public class RevisionTypeType implements UserType, Serializable {
    private static final long serialVersionUID = -1053201518229282688L;
    
    private static final int[] SQL_TYPES = { Types.TINYINT };

    public int[] sqlTypes() {
        return SQL_TYPES;
    }

    public Class returnedClass() {
        return RevisionType.class;
    }

    public RevisionType nullSafeGet(ResultSet resultSet, String[] names, SessionImplementor session, Object owner) throws HibernateException, SQLException {
		Integer representationInt = IntegerType.INSTANCE.nullSafeGet( resultSet, names[0], session );
		return representationInt == null ?
				null :
				RevisionType.fromRepresentation( representationInt.byteValue() );
    }

    public void nullSafeSet(PreparedStatement preparedStatement, Object value, int index, SessionImplementor session) throws HibernateException, SQLException {
		IntegerType.INSTANCE.nullSafeSet(
				preparedStatement,
				( value == null ? null : ((RevisionType) value).getRepresentation().intValue() ),
				index,
				session
		);
    }

    public Object deepCopy(Object value) throws HibernateException{
        return value;
    }

    public boolean isMutable() {
        return false;
    }

    public Object assemble(Serializable cached, Object owner) throws HibernateException {
        return cached;
    }

    public Serializable disassemble(Object value) throws HibernateException {
        return (Serializable)value;
    }

    public Object replace(Object original, Object target, Object owner) throws HibernateException {
        return original;
    }

    public int hashCode(Object x) throws HibernateException {
        return x.hashCode();
    }

    public boolean equals(Object x, Object y) throws HibernateException {
        //noinspection ObjectEquality
        if (x == y) {
            return true;
        }

        if (null == x || null == y) {
            return false;
        }

        return x.equals(y);
    }
}