//$Id: OneToOneType.java 7644 2005-07-25 06:53:09Z oneovthafew $
package org.hibernate.type;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.engine.EntityKey;
import org.hibernate.engine.Mapping;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.util.ArrayHelper;
/**
* A one-to-one association to an entity
* @author Gavin King
*/
public class OneToOneType extends EntityType {
private final ForeignKeyDirection foreignKeyType;
private final String propertyName;
private final String entityName;
public String getPropertyName() {
return propertyName;
}
public boolean isNull(Object owner, SessionImplementor session) {
if ( propertyName != null ) {
EntityPersister ownerPersister = session.getFactory()
.getEntityPersister(entityName);
Serializable id = session.getContextEntityIdentifier(owner);
EntityKey entityKey = new EntityKey( id, ownerPersister, session.getEntityMode() );
return session.getPersistenceContext()
.isPropertyNull( entityKey, getPropertyName() );
}
else {
return false;
}
}
public int getColumnSpan(Mapping session) throws MappingException {
return 0;
}
public int[] sqlTypes(Mapping session) throws MappingException {
return ArrayHelper.EMPTY_INT_ARRAY;
}
public boolean[] toColumnNullness(Object value, Mapping mapping) {
return ArrayHelper.EMPTY_BOOLEAN_ARRAY;
}
public OneToOneType(
String referencedEntityName,
ForeignKeyDirection foreignKeyType,
String uniqueKeyPropertyName,
boolean lazy,
boolean unwrapProxy,
boolean isEmbeddedInXML,
String entityName,
String propertyName
) {
super(
referencedEntityName,
uniqueKeyPropertyName,
!lazy,
isEmbeddedInXML,
unwrapProxy
);
this.foreignKeyType = foreignKeyType;
this.propertyName = propertyName;
this.entityName = entityName;
}
public void nullSafeSet(PreparedStatement st, Object value, int index, boolean[] settable, SessionImplementor session) {
//nothing to do
}
public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session) {
//nothing to do
}
public boolean isOneToOne() {
return true;
}
public boolean isDirty(Object old, Object current, SessionImplementor session) {
return false;
}
public boolean isDirty(Object old, Object current, boolean[] checkable, SessionImplementor session) {
return false;
}
public boolean isModified(Object old, Object current, boolean[] checkable, SessionImplementor session) {
return false;
}
public ForeignKeyDirection getForeignKeyDirection() {
return foreignKeyType;
}
public Object hydrate(
ResultSet rs,
String[] names,
SessionImplementor session,
Object owner)
throws HibernateException, SQLException {
return session.getContextEntityIdentifier(owner);
}
protected boolean isNullable() {
return foreignKeyType==ForeignKeyDirection.FOREIGN_KEY_TO_PARENT;
}
public boolean useLHSPrimaryKey() {
return true;
}
public Serializable disassemble(Object value, SessionImplementor session, Object owner)
throws HibernateException {
return null;
}
public Object assemble(Serializable oid, SessionImplementor session, Object owner)
throws HibernateException {
//this should be a call to resolve(), not resolveIdentifier(),
//'cos it might be a property-ref, and we did not cache the
//referenced value
return resolve( session.getContextEntityIdentifier(owner), session, owner );
}
/**
* We don't need to dirty check one-to-one because of how
* assemble/disassemble is implemented and because a one-to-one
* association is never dirty
*/
public boolean isAlwaysDirtyChecked() {
//TODO: this is kinda inconsistent with CollectionType
return false;
}
}
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