Sequential coupling

In object-oriented programming, sequential coupling (also known as temporal coupling) is a form of coupling where a class requires its methods to be called in a particular sequence. This may be an anti-pattern, depending on context.

Methods whose name starts with Init, Begin, Start, etc. may indicate the existence of sequential coupling.

Using a car as an analogy, if the user steps on the gas without first starting the engine, the car does not crash, fail, or throw an exception - it simply fails to accelerate.

Sequential coupling can be refactored with the template method pattern to overcome the problems posed by the usage of this anti-pattern.^[1]

References

^ Andriy, Buday (15 April 2010). "Refactor: Sequential Coupling => Template Method". The Code Project. Retrieved 23 April 2011.

[1] Andriy, Buday (15 April 2010). "Refactor: Sequential Coupling => Template Method". The Code Project. Retrieved 23 April 2011.

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