August 1999
Intermediate to advanced
224 pages
4h 25m
English
book
UML Distilled: A Brief Guide to the Standard Object Modeling Language, Second Edition
by Martin Fowler, Kendall Scott
Content preview from UML Distilled: A Brief Guide to the Standard Object Modeling Language, Second Edition
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Chapter 8. State Diagrams
State diagrams are a familiar technique to describe the behavior of a system. They describe all of the possible states that a particular object can get into and how the object's state changes as a result of events that reach the object. In most OO techniques, state diagrams are drawn for a single class to show the lifetime behavior of a single object.
There are many forms of state diagrams, each with slightly different semantics. The UML style is based on David Harel's (1987) statechart. Figure 8-1 shows a UML state diagram for an order in the order processing system I introduced earlier in the book. The diagram indicates the various states of an order.
Figure 8-1. State Diagram
Figure 8-1 shows a UML state diagram ...
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