Model States
(Tutorial Page 27)
  • Steady conditions that object remains in
  • States are abstractions of attributes, links & associations
  • Two types of state machines
  • Closed loop : Run forever, with probably an idle state
  • Open loop: Has definite start and terminate states
  • An event causes a transition from one state to another
  • Operations are tied to states (activities), events (actions)
  • Passive objects simply return a value
  • Active objects propagate messages to other objects
    |-Previous Slide-| -Next Slide-| -Table of Contents-|-List of Tutorials-| -Home Page-|-Disclaimer-|
    If desired, insert comments for ooanly27
    Your Email Address(Optional)
    Action
    Copyright © 1997 Object Ideas Corporation --- Last Updated January 15, 1997