Understanding Gravel-Walk: A Design Pattern for Separating High-Level Logic and Low-Level Implementation

Gravel-walk, in the context of computer science and software engineering, refers to a design pattern that involves using a combination of gravel (i.e., a coarse-grained) and fine-grained objects to solve a problem. The idea behind this pattern is to use gravel objects to handle high-level concepts and fine-grained objects to handle low-level details.

In other words, gravel-walk is a way of organizing code and data structures so that the high-level logic of a program is separated from the low-level implementation details. This allows for more flexibility and maintainability in the code, as changes to the high-level logic do not affect the low-level implementation.

The term "gravel" comes from the idea that just as gravel is a coarse material that is used to cover large areas, gravel objects are coarse-grained and handle high-level concepts. Fine-grained objects, on the other hand, are like the small stones that make up the gravel, and they handle low-level details.

Gravel-walk is often used in object-oriented programming (OOP) to decouple the high-level logic of a program from its low-level implementation. It is also known as the "gravel principle" or the "coarse-graining principle."