Data Mapper Pattern
The Data Mapper Pattern is a software design pattern that separates the in-memory object representation from the database persistence logic. It acts as an intermediary layer that transfers data between objects and a database while keeping them independent of each other. This pattern is commonly used in object-relational mapping (ORM) systems to decouple business logic from data access concerns.
Developers should use the Data Mapper Pattern when building applications that require a clean separation between domain objects and database schemas, such as in enterprise systems or complex domain-driven designs. It is particularly useful for maintaining testability, as it allows mocking of data access layers, and for scenarios where database changes should not directly impact the business logic, enabling easier maintenance and scalability.