/*
* 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.test.hql;
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.SharedSessionContractImplementor;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.usertype.EnhancedUserType;
/**
* A custom type for mapping {@link org.hibernate.test.hql.Classification} instances
* to the respective db column.
* </p>
* THis is largely intended to mimic JDK5 enum support in JPA. Here we are
* using the approach of storing the ordinal values, rather than the names.
*
* @author Steve Ebersole
*/
public class ClassificationType implements EnhancedUserType {
@Override
public int[] sqlTypes() {
return new int[] { Types.TINYINT };
}
@Override
public Class returnedClass() {
return Classification.class;
}
@Override
public boolean equals(Object x, Object y) throws HibernateException {
if ( x == null && y == null ) {
return false;
}
else if ( x != null ) {
return x.equals( y );
}
else {
return y.equals( x );
}
}
@Override
public int hashCode(Object x) throws HibernateException {
return x.hashCode();
}
@Override
public Object nullSafeGet(ResultSet rs, String[] names, SharedSessionContractImplementor session, Object owner) throws HibernateException, SQLException {
Integer ordinal = StandardBasicTypes.INTEGER.nullSafeGet( rs, names[0], session );
return Classification.valueOf( ordinal );
}
@Override
public void nullSafeSet(PreparedStatement st, Object value, int index, SharedSessionContractImplementor session) throws HibernateException, SQLException {
Integer ordinal = value == null ? null : new Integer( ( ( Classification ) value ).ordinal() );
StandardBasicTypes.INTEGER.nullSafeSet( st, ordinal, index, session );
}
@Override
public Object deepCopy(Object value) throws HibernateException {
return value;
}
@Override
public boolean isMutable() {
return false;
}
@Override
public Serializable disassemble(Object value) throws HibernateException {
return ( Classification ) value;
}
@Override
public Object assemble(Serializable cached, Object owner) throws HibernateException {
return cached;
}
@Override
public Object replace(Object original, Object target, Object owner) throws HibernateException {
return original;
}
@Override
public String objectToSQLString(Object value) {
return extractOrdinalString( value );
}
@Override
public String toXMLString(Object value) {
return extractName( value );
}
@Override
public Object fromXMLString(String xmlValue) {
return Classification.valueOf( xmlValue );
}
private String extractName(Object obj) {
return ( ( Classification ) obj ).name();
}
private int extractOrdinal(Object value) {
return ( ( Classification ) value ).ordinal();
}
private String extractOrdinalString(Object value) {
return Integer.toString( extractOrdinal( value ) );
}
}