//$Id: SpecialOneToOneType.java 7246 2005-06-20 20:32:36Z oneovthafew $
package org.hibernate.type;
import java.io.Serializable;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.hibernate.AssertionFailure;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.engine.ForeignKeys;
import org.hibernate.engine.Mapping;
import org.hibernate.engine.SessionImplementor;
/**
* A one-to-one association that maps to specific formula(s)
* instead of the primary key column of the owning entity.
*
* @author Gavin King
*/
public class SpecialOneToOneType extends OneToOneType {
public SpecialOneToOneType(
String referencedEntityName,
ForeignKeyDirection foreignKeyType,
String uniqueKeyPropertyName,
boolean lazy,
boolean unwrapProxy,
String entityName,
String propertyName
) {
super(
referencedEntityName,
foreignKeyType,
uniqueKeyPropertyName,
lazy,
unwrapProxy,
true,
entityName,
propertyName
);
}
public int getColumnSpan(Mapping mapping) throws MappingException {
return super.getIdentifierOrUniqueKeyType(mapping).getColumnSpan(mapping);
}
public int[] sqlTypes(Mapping mapping) throws MappingException {
return super.getIdentifierOrUniqueKeyType(mapping).sqlTypes(mapping);
}
public boolean useLHSPrimaryKey() {
return false;
}
public Object hydrate(ResultSet rs, String[] names, SessionImplementor session, Object owner)
throws HibernateException, SQLException {
return super.getIdentifierOrUniqueKeyType( session.getFactory() )
.nullSafeGet(rs, names, session, owner);
}
// TODO: copy/paste from ManyToOneType
public Serializable disassemble(Object value, SessionImplementor session, Object owner)
throws HibernateException {
if ( isNotEmbedded(session) ) {
return getIdentifierType(session).disassemble(value, session, owner);
}
if (value==null) {
return null;
}
else {
// cache the actual id of the object, not the value of the
// property-ref, which might not be initialized
Object id = ForeignKeys.getEntityIdentifierIfNotUnsaved( getAssociatedEntityName(), value, session );
if (id==null) {
throw new AssertionFailure(
"cannot cache a reference to an object with a null id: " +
getAssociatedEntityName()
);
}
return getIdentifierType(session).disassemble(id, session, owner);
}
}
public Object assemble(Serializable oid, SessionImplementor session, Object owner)
throws HibernateException {
//TODO: currently broken for unique-key references (does not detect
// change to unique key property of the associated object)
Serializable id = (Serializable) getIdentifierType(session).assemble(oid, session, null); //the owner of the association is not the owner of the id
if ( isNotEmbedded(session) ) return id;
if (id==null) {
return null;
}
else {
return resolveIdentifier(id, session);
}
}
}
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