HHH-16719 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/query/criteria/CriteriaInheritanceJoinTest.java

@@ -0,0 +1,162 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.orm.test.query.criteria;
+
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.Jira;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.DiscriminatorColumn;
+import jakarta.persistence.DiscriminatorValue;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.Inheritance;
+import jakarta.persistence.OneToOne;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
+import jakarta.persistence.criteria.Join;
+import jakarta.persistence.criteria.Root;
+
+import static jakarta.persistence.DiscriminatorType.STRING;
+import static jakarta.persistence.InheritanceType.SINGLE_TABLE;
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Marco Belladelli
+ */
+@SessionFactory
+@DomainModel( annotatedClasses = {
+		CriteriaInheritanceJoinTest.Address.class,
+		CriteriaInheritanceJoinTest.StreetAddress.class,
+		CriteriaInheritanceJoinTest.Street.class,
+} )
+@Jira( "https://hibernate.atlassian.net/browse/HHH-16719" )
+public class CriteriaInheritanceJoinTest {
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final Street street = new Street( "Via Roma" );
+			session.persist( street );
+			final StreetAddress streetAddress = new StreetAddress( 1, "A", street );
+			session.persist( streetAddress );
+		} );
+	}
+
+	@AfterAll
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			session.createMutationQuery( "delete from StreetAddress" ).executeUpdate();
+			session.createMutationQuery( "delete from Street" ).executeUpdate();
+		} );
+	}
+
+	@Test
+	public void findStreet(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final CriteriaBuilder cb = session.getCriteriaBuilder();
+			final CriteriaQuery<Street> streetCriteriaQuery = cb.createQuery( Street.class );
+			final Root<Street> streetRoot = streetCriteriaQuery.from( Street.class );
+			streetCriteriaQuery.select( streetRoot ).where( cb.equal( streetRoot.get( "name" ), "Via Roma" ) );
+			final Street result = session.createQuery( streetCriteriaQuery ).getSingleResult();
+			assertThat( result.getName() ).isEqualTo( "Via Roma" );
+		} );
+	}
+
+	@Test
+	public void findAddressImplicitJoin(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final CriteriaBuilder cb = session.getCriteriaBuilder();
+			final CriteriaQuery<Address> cq = cb.createQuery( Address.class );
+			final Root<Address> addressRoot = cq.from( Address.class );
+			cq.select( addressRoot ).where(
+					cb.equal( cb.treat( addressRoot, StreetAddress.class )
+									  .get( "street" )
+									  .get( "name" ), "Via Roma" )
+			);
+			final Address result = session.createQuery( cq ).getSingleResult();
+			assertThat( result ).isInstanceOf( StreetAddress.class );
+			assertThat( ( (StreetAddress) result ).getStreet().getName() ).isEqualTo( "Via Roma" );
+		} );
+	}
+
+	@Test
+	public void findAddressExplicitJoin(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final CriteriaBuilder cb = session.getCriteriaBuilder();
+			final CriteriaQuery<Address> cq = cb.createQuery( Address.class );
+			final Root<Address> addressRoot = cq.from( Address.class );
+			final Join<Address, Street> join = addressRoot.join( "street" );
+			cq.select( addressRoot ).where( cb.equal( join.get( "name" ), "Via Roma" ) );
+			final Address result = session.createQuery( cq ).getSingleResult();
+			assertThat( result ).isInstanceOf( StreetAddress.class );
+			assertThat( ( (StreetAddress) result ).getStreet().getName() ).isEqualTo( "Via Roma" );
+		} );
+	}
+
+	@Entity( name = "Address" )
+	@Inheritance( strategy = SINGLE_TABLE )
+	@DiscriminatorColumn( name = "disc_col", discriminatorType = STRING )
+	public static class Address {
+		@Id
+		@GeneratedValue
+		private Long id;
+	}
+
+	@Entity( name = "StreetAddress" )
+	@DiscriminatorValue( "O" )
+	public static class StreetAddress extends Address {
+		private Integer houseNumber;
+		private String houseLetter;
+		@OneToOne
+		private Street street;
+
+		public StreetAddress() {
+		}
+
+		public StreetAddress(Integer houseNumber, String houseLetter, Street street) {
+			this.houseNumber = houseNumber;
+			this.houseLetter = houseLetter;
+			this.street = street;
+		}
+
+		public Integer getHouseNumber() {
+			return houseNumber;
+		}
+
+		public String getHouseLetter() {
+			return houseLetter;
+		}
+
+		public Street getStreet() {
+			return street;
+		}
+	}
+
+	@Entity( name = "Street" )
+	public static class Street {
+		@Id
+		@GeneratedValue
+		private Long id;
+		private String name;
+
+		public Street() {
+		}
+
+		public Street(String name) {
+			this.name = name;
+		}
+
+		public String getName() {
+			return name;
+		}
+	}
+}