State Charts for Example ATM System

State Charts for Example ATM System

Three of the objects we have identified have behavior that is sufficiently complex to warrant developing a State Chart for them. (These are the objects that were identified as the major controller objects.)

The object representing the machine itself (responsible for the System Startup and Shutdown use cases)
Objects representing a customer session (one per session) (responsible for the Session use case)
Objects representing an individual transaction (one per transaction) (responsible for the Transaction use case, use cases for the specific types of transaction, and Invalid PIN extension).

[ Statechart for overall ATM ]
[ CRC Card for ATM ] [ Interaction diagram for Startup ] [ Interaction diagram for Shutdown ]

[ Statechart for a session ]
[ CRC Card for Session ] [ Interaction diagram for Session ]

[ Statechart for a transaction ]
[ CRC Card for Transaction ] [ Interaction diagram for Transaction ]
[ CRC Card for Withdrawal ] [ Interaction diagram for portion unique to Withdrawal ]
[ CRC Card for Deposit ] [ Interaction diagram for portion unique to Deposit ]
[ CRC Card for Transfer ] [ Interaction diagram for portion unique to Transfer ]
[ CRC Card for Inquiry ] [ Interaction diagram for portion unique to Inquiry ]
[ Interaction diagram for Invalid PIN Extension ]

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Copyright © 2000, 2001, 2002 - Russell C. Bjork. Permission for non-commercial reproduction for educational use is hereby granted; all other rights are reserved.