Division of Responsibilities

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Contracts and Assertions - slide 11 : 32

Division of Responsibilities

A class manages a certain responsibility

We wish to avoid that a set of classes escape from responsibilities

We also wish to avoid overlapping responsibilities between pair of classes

Responsibility

Division of responsibilities
- Without well-defined division of responsibilities
  - All classes accept a large responsibility
  - All program parts check all possible conditions (defensive programming)
  - Makes a large program even larger
- With well-defined division of responsibilities
  - Operations can safely operate under given assumptions
  - It is well-defined which parts should check which conditions
  - Simplifies the program