Supports create criteria parameter for generic type

[quaff]

ParameterExpression<List> parameter = criteriaBuilder.parameter(List.class, "list");

is not type safe, We need add a Super Type Token like TypeReference

ParameterExpression<List<Integer>> parameter = criteriaBuilder.parameter(new TypeReference<List<Integer>>{}, "list");

[gavinking]

You mean like a CDI TypeLiteral, right?

But what is the usecase here? For use with in conditions? Or something else?

[quaff]

You mean like a CDI TypeLiteral, right?

Yes.

But what is the usecase here? For use with in conditions? Or something else?

Not in but equal.

	@Entity
	public class TestEntity {

		@Id
		@GeneratedValue
		Long id;

		List<Integer> list;

	}

ParameterExpression<List<Integer>> parameter = criteriaBuilder.parameter(List.class);  // cannot compile
Root<TestEntity> root = criteria.from(TestEntity.class);
criteria.select(root).where(criteriaBuilder.equal(root.get(TestEntity_.list), parameter));

[gavinking]

I see. So I suppose this:

List<Integer> list;

is possible in standard JPA with an AttributeConverter.

[quaff]

I see. So I suppose this:

List<Integer> list;

is possible in standard JPA with an AttributeConverter.

Hibernate will map it to array now, no need AttributeConverter.

[gavinking]

Right, I know that, but that's not standard in the Persistence spec.