Roles

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The roles and functions of the Object By Value design pattern are as follows:

• PersistableObject Specifies an interface for reading and writing the state of an object to and from a data stream.
• ConcretePersistableObject A class that implements behavior of the PersistableObject interface for reading and writing its state to a data stream.
• ObjectTransformer A class that defines the behavior for facilitating the transformation of an original object's state to a data stream and a data stream back into a newly constructed copy of the original object in the same state.