Add fsp-relational dependency to your project
<dependency>
<groupId>pl.execon.commons</groupId>
<artifactId>fsp-relational</artifactId>
<version>0.1.0</version>
</dependency>In your repository interface extend RelationalFsp<T> interface in your repository interface. This will enable on this
repository method findFsp().
+ extends RelationalFsp<T>@Repository
public interface ProductRepository extends JpaRepository<Product, Long>, RelationalFsp<Product> {
}Last step is using findFsp() method in your service passing FspRequest.
public FspResponse<Product> getFilteredProduct(){
return repository.findFsp(new FspRequest());
}Example of use FSP for Product entity.
@Entity
public class Product {
@Id
private Long id;
private String name;
private int quantity;
} @Service
@AllArgsConstructor
public class ProductService {
private final ProductRepository repository;
public FspResponse<Product> getFilteredProducts(FspRequest fspRequest) {
return repository.findFsp(fspRequest);
}
}@RestController
@AllArgsConstructor
public class ProductController {
private final ProductService service;
@PostMapping("/fsp")
public FspResponse<Product> getFilteredProducts(@RequestBody FspRequest fspRequest) {
return service.getFilteredProducts(fspRequest);
}
}FspRequest mapping funcion
You can also call mapping function on FspResponse object to map your result to for example DTO object
public class ProductService {
public FspResponse<ProductDTO> getFilteredProducts(FspRequest fspRequest) {
FspResponse<Product> products = repository.findFsp(fspRequest, Product.class);
return products.map(product -> mappingFunction(product));
}
}