crudrepository findBy method signature for list of tuples

Question

I have an Entity Class like this:

@Entity
@Table(name = \"CUSTOMER\")
class Customer{
    @Id
    @Column(name = \"Id\")
    Long id;
    @Column(name = \"EM         


        

Answer 1

I think this can be done with org.springframework.data.jpa.domain.Specification. You can pass a list of your tuples and proceed them this way (don't care that Tuple is not an entity, but you need to define this class):

public class CustomerSpecification implements Specification {

    // names of the fields in your Customer entity
    private static final String CONST_EMAIL_ID = "emailId";
    private static final String CONST_MOBILE = "mobile";

    private List tuples;

    public ClaimSpecification(List tuples) {
        this.tuples = tuples;
    }

    @Override
    public Predicate toPredicate(Root root, CriteriaQuery query, CriteriaBuilder cb) {
        // will be connected with logical OR
        List predicates = new ArrayList<>();

        tuples.forEach(tuple -> {
            List innerPredicates = new ArrayList<>();
            if (tuple.getEmail() != null) {
                 innerPredicates.add(cb.equal(root
                     .get(CONST_EMAIL_ID), tuple.getEmail()));
            }
            if (tuple.getMobile() != null) {
                 innerPredicates.add(cb.equal(root
                     .get(CONST_MOBILE), tuple.getMobile()));
            }
            // these predicates match a tuple, hence joined with AND
            predicates.add(andTogether(innerPredicates, cb));
        });

        return orTogether(predicates, cb);
    }

    private Predicate orTogether(List predicates, CriteriaBuilder cb) {
        return cb.or(predicates.toArray(new Predicate[0]));
    }

    private Predicate andTogether(List predicates, CriteriaBuilder cb) {
        return cb.and(predicates.toArray(new Predicate[0]));
    }
}

Your repo is supposed to extend interface JpaSpecificationExecutor.

Then construct a specification with a list of tuples and pass it to the method customerRepo.findAll(Specification) - it returns a list of customers.