How can you filter an Entity without querying the database and without a loop?

Question

Java

Please tell me if there is an analogue of Link from NET in JPA, so that you can filter the TestEntity loaded with records. For example, I made a request and loaded all the records from the TEST table, then, as needed, I select only the necessary records. Thanks in advance!
public List findResult() {
return em.createQuery("SELECT t FROM TestEntity t").getResultList();
}

Answer 1

JPA has its own object-oriented query language. In Hibernate it's HQL, in JPA it's JPQL.
https://ru.wikipedia.org/wiki/Java_Persistence_Que...

Answer 2

If you need to filter the list of records retrieved from the database. then this can be done using lambdas and StreamAPI. Something like:

list.stream()
    .filter(entity -> "bar".equals(entity.getFoo()))
    .collect(Collectors.toList());

And in general it is necessary to filter in request to a DB.

Answer 3

Uploaded where? In array?