public OneToOne(Table table,
    PersistentClass owner) throws MappingException 
{
		super(table);
		this.identifier = owner.getKey();
		this.entityName = owner.getEntityName();
}

 public Object accept(ValueVisitor visitor) 
{
		return visitor.accept(this);
}

 public  void createForeignKey() throws MappingException 
{
		if ( constrained && referencedPropertyName==null) {
			//TODO: handle the case of a foreign key to something other than the pk
			createForeignKeyOfEntity( ( (EntityType) getType() ).getAssociatedEntityName() );
		}
}

 public List getConstraintColumns() 
{
		ArrayList list = new ArrayList();
		Iterator iter = identifier.getColumnIterator();
		while ( iter.hasNext() ) list.add( iter.next() );
		return list;
}

 public String getEntityName() 
{
		return entityName;
}

 public ForeignKeyDirection getForeignKeyType() 
{
		return foreignKeyType;
}

Returns the foreignKeyType.

 public KeyValue getIdentifier() 
{
		return identifier;
}

Returns the identifier.

 public String getPropertyName() 
{
		return propertyName;
}

 public Type getType() throws MappingException 
{
		if ( getColumnIterator().hasNext() ) {
			return new SpecialOneToOneType(
					getReferencedEntityName(), 
					foreignKeyType, 
					referencedPropertyName,
					isLazy(),
					isUnwrapProxy(),
					entityName,
					propertyName
				);
		}
		else {
			return TypeFactory.oneToOne( 
					getReferencedEntityName(), 
					foreignKeyType, 
					referencedPropertyName,
					isLazy(),
					isUnwrapProxy(),
					isEmbedded(),
					entityName,
					propertyName
				);
		}
}

 public boolean isConstrained() 
{
		return constrained;
}

Returns the constrained.

 public boolean isNullable() 
{
		return !constrained;
}

 public  void setConstrained(boolean constrained) 
{
		this.constrained = constrained;
}

Sets the constrained.

 public  void setEntityName(String propertyName) 
{
		this.entityName = entityName==null ? null : entityName.intern();
}

 public  void setForeignKeyType(ForeignKeyDirection foreignKeyType) 
{
		this.foreignKeyType = foreignKeyType;
}

Sets the foreignKeyType.

 public  void setIdentifier(KeyValue identifier) 
{
		this.identifier = identifier;
}

Sets the identifier.

 public  void setPropertyName(String propertyName) 
{
		this.propertyName = propertyName==null ? null : propertyName.intern();
}