NOTE

Composition Reuse Principle

What the composition reuse principle is, why it is needed, and how composition or aggregation can be preferred over inheritance for code reuse.

Software Architecture & EngineeringCreated 08/30/2021Updated 08/30/20211 min readhistorical

This is a historical learning note and may contain outdated or incomplete understanding.

1. What Is the Composition Reuse Principle?

Use composition or aggregation relationships for code reuse whenever possible, and use inheritance less.

It is the embodiment of the open–closed principle in composition/aggregation.

Improve software reusability through composition.

Inject the new object as an attribute of the existing object.

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