State Machine Diagrams Chapter 29 State Machine Diagrams

Represent state of an object Behavior as reaction to events Sate Machine Diagrams Represent state of an object Behavior as reaction to events

Fig. 29.1 Telephone

Does an object have state? State Machines Models Does an object have state? Objects are state dependent - React differently to the same input Business systems tend to not have state dependent objects Process control, protocol handles, device controls - often are state dependent

Fig. 29.2 Notation

Fig. 29.3 Nested State Machines

Fig. 29.4 UI navigation

Fig. 29.5 NextGen Use case state machine

UP does not define specific functions for State Machine Diagrams Summary UP does not define specific functions for State Machine Diagrams Another useful tool State machines appear in many places!