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Information Expert Principle in GRASP
The Key to Cohesive Object-Oriented Design
In the intricate tapestry of object-oriented design, the GRASP (General Responsibility Assignment Software Patterns) principles serve as vital threads that guide developers towards creating robust, maintainable, and scalable software. Among these, the Information Expert principle stands out as a cornerstone for assigning responsibilities in a way that promotes cohesion and reduces complexity. This article dives into the nuances of the Information Expert principle, exploring its significance and applications in object-oriented design.
Understanding the Information Expert Principle
At its core, the Information Expert principle is about identifying the most appropriate location for a particular responsibility or function in a software system. The central idea is deceptively simple: assign a responsibility to the class that has the information necessary to fulfill it. In other words, the class that contains the necessary data to execute a function should be the one to implement it.
This principle draws on the concept of cohesion, a measure of how closely related the responsibilities of a single class are. By aligning responsibilities with the relevant information, the Information Expert principle enhances…
