How to filter Entity without a request in the database and no cycle?

Question

How to filter Entity without a request in the database and no cycle?

Please tell me whether JPA analogue Link from the NET, well, to be able to filter the loaded records TestEntity. For example, I did request and downloaded all the records from the table TEST, then as needed, I select only the desired records. Thanks In Advance!
public List findResult() {
return em.createQuery("SELECT t FROM TestEntity t").getResultList();
}

Java

Dorothy_Lehn asked July 8th 19 at 12:07

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More answers about "How to filter Entity without a request in the database and no cycle?"

3 answers

hank51 answered on July 8th 19 at 12:11

If you want to filter the list of records retrieved from the database. you can do this using lambdas and StreamAPI. Something like:

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

In General, you need to filter in the query to the database.

Millie_Bechtel answered on July 8th 19 at 12:13

Uploaded where? In array?

Larry_Ullrich answered on · Accepted Answer · 2019-07-08T12:09:33.754Z

Larry_Ullrich answered on July 8th 19 at 12:09

Solution

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