HHH-15482 Add test for issue
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/*
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* Hibernate, Relational Persistence for Idiomatic Java
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*
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* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
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* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
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*/
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package org.hibernate.orm.test.query.criteria;
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import java.util.List;
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import org.hibernate.testing.TestForIssue;
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import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
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import org.hibernate.testing.orm.junit.Jpa;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import jakarta.persistence.Entity;
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import jakarta.persistence.Id;
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import jakarta.persistence.ManyToOne;
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import jakarta.persistence.Table;
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import jakarta.persistence.Tuple;
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import jakarta.persistence.criteria.CriteriaBuilder;
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import jakarta.persistence.criteria.CriteriaQuery;
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import jakarta.persistence.criteria.Join;
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import jakarta.persistence.criteria.Root;
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import static org.assertj.core.api.Assertions.assertThat;
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@Jpa(
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annotatedClasses = {
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SelectCaseTest.Address.class,
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SelectCaseTest.Person.class
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}
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)
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@TestForIssue(jiraKey = "HHH-15482")
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public class SelectCaseTest {
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@BeforeEach
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public void setUp(EntityManagerFactoryScope scope) {
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scope.inTransaction(
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entityManager -> {
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Address address = new Address( "RM", "Via Fori Imperiali", "Roma" );
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Person person = new Person( 1, "Roberto", 70, address );
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entityManager.persist( address );
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entityManager.persist( person );
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Address address2 = new Address( "GR", "Via Roma", "Gradoli" );
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Person person2 = new Person( 2, "Andrea", 50, address2 );
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entityManager.persist( address2 );
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entityManager.persist( person2 );
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}
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);
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}
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@Test
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public void testSelectCaseStringExpressionReturningAnIntegerValues(EntityManagerFactoryScope scope) {
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scope.inTransaction(
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entityManager -> {
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CriteriaBuilder cb = entityManager.getCriteriaBuilder();
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CriteriaQuery<Tuple> criteriaQuery = cb.createTupleQuery();
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Root<Person> personRoot = criteriaQuery.from( Person.class );
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Join<Object, Object> secondaryJoin = personRoot.join( "address" );
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criteriaQuery.multiselect(
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cb.selectCase( secondaryJoin.get( "code" ) )
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.when( "GR", personRoot.get( "age" ) )
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.otherwise( cb.nullLiteral( Integer.class ) )
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.alias( "person_age" )
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).orderBy( cb.asc( personRoot.get( "id" ) ) );
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List<Tuple> ages = entityManager.createQuery( criteriaQuery ).getResultList();
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assertThat( ages.size() ).isEqualTo( 2 );
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assertThat( ages.get( 0 ).get( "person_age" ) ).isNull();
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assertThat( ages.get( 1 ).get( "person_age" ) ).isEqualTo( 50 );
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}
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);
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}
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@Entity
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@Table(name = "PERSON_TABLE")
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public class Person {
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@Id
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private int id;
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private String name;
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private Integer age;
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@ManyToOne
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private Address address;
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public Person() {
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}
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public Person(int id, String name, Integer age, Address address) {
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this.id = id;
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this.name = name;
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this.age = age;
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this.address = address;
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}
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}
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@Entity
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@Table(name = "ADDRESS_TABLE")
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public static class Address {
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@Id
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private String code;
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private String street;
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private String city;
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public Address() {
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}
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public Address(String code, String street, String city) {
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this.code = code;
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this.street = street;
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this.city = city;
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}
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}
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}
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