Spring Data JPA MongoDB Expressions

Accepts MongoDB-style JSON queries (e.g., $or, $gt) and translates them to JPA Criteria API, enabling frontend clients to send complex, dynamic queries without backend changes, as shown in the example JSON payload.

Works by extending Spring Data JPA repositories with minimal changes—just setting the repositoryBaseClass to ExpressionsRepositoryImpl and extending ExpressionsRepository, per the README setup.

Reduces backend boilerplate by allowing frontend applications to build queries directly in JSON, eliminating the need for custom endpoint logic, which is highlighted in the key features.

Seamlessly integrates with Spring Data's Pageable for efficient result handling, mentioned as a key feature in the documentation.

Leverages JPA entity mappings to ensure query correctness, preventing errors by aligning queries with the data model, as noted in the key features.