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Object-Oriented Sequence Diagrams

Object-Oriented Sequence Diagrams. Week 10 CMIS 570. Plan for Tonight. Sequence diagrams Turn in Use Case diagram Turn in Oracle Process model Hand out Sequence diagram homework and FHD homework. Sequence Diagrams.

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Object-Oriented Sequence Diagrams

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  1. Object-Oriented Sequence Diagrams Week 10 CMIS 570

  2. Plan for Tonight • Sequence diagrams • Turn in Use Case diagram • Turn in Oracle Process model • Hand out Sequence diagram homework and FHD homework

  3. Sequence Diagrams • Illustrates the objects that participate in a use-case and the messages that pass between them over time for one use-case. • A dynamic model • Most similar to a DFD Level 0

  4. Elements of a Sequence Diagram • Text • Objects • Message or interaction • Message Condition • Dotted Line • Focus of Control or Activation

  5. Object creates Object • If object creates an object, message is sent directly to an object instead of its lifeline.

  6. Creating a Sequence Diagram • 1. Copy text for use case from the use case specification. Paste it onto the left margin of the page. • 2. Identify Objects • 3. Add messages • 4. Place lifeline and focus of control

  7. Examples • Rent a Car • Search by Author

  8. TIPS • Don’t turn your sequence diagram into a flowchart • Update existing models

  9. Modification of Class Diagram • Similar to DFDs and ERDs, after creating a Sequence Diagram, you may alter your Class Diagram.

  10. For Next Class Meeting… • FHD/CRUD • Alternative Design Document

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