Behavior : State Machine Diagrams - State Machine Processing - State Diagrams and Machines
5 important questions on Behavior : State Machine Diagrams - State Machine Processing - State Diagrams and Machines
When all of an object’s initialization is complete, it will start its state
How does a State Machine start?
- It will start at the topmost level of the state diagram and enter the state pointed to by the Initial Pseudostate (solid ball).
- This is the initial transition.
- It is normally unlabeled.
- However, it may be labeled with the Event type of the occurrence that created the object, and otherwise, it must be unlabeled.
- There can only be one Initial Pseudostate per region.
- The topmost state machine diagram is a region.
- The transition from the Initial Pseudostate cannot have a trigger or guard, though it may have a behavior.
- Only one transition is allowed from the Initial Pseudostate.
If there is only one state at the topmost level of te diagram, usually it is interpreteded as...
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If there was no Initial Pseudostate and there are multiple states in the topmost region of the diagram, the behavior is...
What is the Header and the Diagram-Kind in a State Machine?
- The header for the state machine diagram is the same pentagonal shape that the other diagrams use.
- The diagram-kind field is stm, indicating a state machine.
- A state machine diagram can only have one state machine inside it. See Fig. 18.26.
- The second field in the stm header indicates the name of the classifier or behavior that follows the contained state machine.
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