Repository Pattern
The Repository Pattern is a software design pattern that mediates between the domain and data mapping layers, acting as an in-memory domain object collection. It abstracts data access logic, providing a collection-like interface for querying and persisting domain objects without exposing underlying data source details. This pattern promotes separation of concerns by decoupling business logic from data access code.
Developers should use the Repository Pattern when building applications that require clean architecture, testability, and maintainability, particularly in domain-driven design (DDD) contexts. It's essential for applications with complex data access needs, multiple data sources, or when implementing unit testing with mock repositories. The pattern simplifies data access code and makes it easier to switch between different data storage technologies.