Transfer Object

So far no constraints are implemented inside a TO. If a checking is required, the receiver of a TO needs to check the specified values on its own, as if it was some parameter checking of a usual method.

Pattern

1. The TransferObject will be creates with in the apropriate BusinessObject. This implies, that an existing BusinessObject implies, that a TransferObject exists for it.
2. The BusinessObject implements the method public TransferObject toTransferObject(). Each object oriented derivation of the business object implements the right version of TransferObject toTransferObject().
3. The BusinessObject implements the method protected TransferObject createTransferObject() which instantiates the appropriate version of the TransferObject.
4. The BusinessObject implements the method public fromTransferObject(TransferObject to).