Criteria API
The Jakarta Persistence Criteria API is meant as a complement to JPQL. The Criteria API allows us to write Jakarta Persistence queries programmatically, without having to rely on JPQL.
The Criteria API offers a few advantages over JPQL – for instance, JPQL queries are stored as Strings, and the compiler has no way of validating JPQL syntax. Additionally, JPQL is not type safe; we could write a JPQL query in which our where clause could have a string value for a numeric property, and our code would compile and deploy just fine.
The following code example illustrates how to use the Criteria API in our Jakarta EE applications:
package com.ensode.jakartaeebook.criteriaapi.namedbean;
//imports omitted for brevity
@Named
@RequestScoped
public class CriteriaApiDemoBean {
@PersistenceContext
private EntityManager entityManager;
private List<UsState> matchingStatesList;
public String findStates() {
...