//$Id: SerializableType.java 10819 2006-11-16 05:12:20Z [email protected] $
package org.hibernate.type;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.hibernate.EntityMode;
import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.util.SerializationHelper;
/**
* <tt>serializable</tt>: A type that maps an SQL VARBINARY to a
* serializable Java object.
* @author Gavin King
*/
public class SerializableType extends MutableType {
private final Class serializableClass;
public SerializableType(Class serializableClass) {
this.serializableClass = serializableClass;
}
public void set(PreparedStatement st, Object value, int index) throws HibernateException, SQLException {
Hibernate.BINARY.set(st, toBytes(value), index);
}
public Object get(ResultSet rs, String name) throws HibernateException, SQLException {
byte[] bytes = (byte[]) Hibernate.BINARY.get(rs, name);
// Some JDBC drivers erroneously return an empty array here for a null DB value :/
if ( bytes == null || bytes.length == 0 ) {
return null;
}
else {
return fromBytes(bytes);
}
}
public Class getReturnedClass() {
return serializableClass;
}
public boolean isEqual(Object x, Object y) throws HibernateException {
if ( x == y ) {
return true;
}
if ( x == null || y == null ) {
return false;
}
return x.equals( y ) || Hibernate.BINARY.isEqual( toBytes( x ), toBytes( y ) );
}
public int getHashCode(Object x, EntityMode entityMode) {
return Hibernate.BINARY.getHashCode( toBytes(x), entityMode );
}
public String toString(Object value) throws HibernateException {
return Hibernate.BINARY.toString( toBytes(value) );
}
public Object fromStringValue(String xml) throws HibernateException {
return fromBytes( (byte[]) Hibernate.BINARY.fromStringValue(xml) );
}
public String getName() {
return (serializableClass==Serializable.class) ? "serializable" : serializableClass.getName();
}
public Object deepCopyNotNull(Object value) throws HibernateException {
return fromBytes( toBytes(value) );
}
private static byte[] toBytes(Object object) throws SerializationException {
return SerializationHelper.serialize( (Serializable) object );
}
private static Object fromBytes( byte[] bytes ) throws SerializationException {
return SerializationHelper.deserialize(bytes);
}
public int sqlType() {
return Hibernate.BINARY.sqlType();
}
public Object assemble(Serializable cached, SessionImplementor session, Object owner)
throws HibernateException {
return (cached==null) ? null : fromBytes( (byte[]) cached );
}
public Serializable disassemble(Object value, SessionImplementor session, Object owner)
throws HibernateException {
return (value==null) ? null : toBytes(value);
}
}
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