HHH-15233 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/query/EntityAsParamValueTest.java

@@ -0,0 +1,155 @@
+/*
+ * 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;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@DomainModel(
+		annotatedClasses = {
+				EntityAsParamValueTest.Event.class,
+				EntityAsParamValueTest.Organizer.class
+		}
+)
+@SessionFactory
+@TestForIssue(jiraKey = "HHH-15223")
+public class EntityAsParamValueTest {
+
+	@BeforeEach
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Organizer organizer = new Organizer( 1L, "Test Organizer" );
+
+					Event eventWithOrganizer = new Event( 1L, "Test Event", organizer );
+					Event eventWithoutOrganizer = new Event( 2L, "Null Event", null );
+
+					session.persist( organizer );
+					session.persist( eventWithOrganizer );
+					session.persist( eventWithoutOrganizer );
+				}
+		);
+	}
+
+	@Test
+	public void testQueryWithEntityAsParamValue(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Organizer organizer = session.get( Organizer.class, 1L );
+					assertNotNull( organizer );
+
+					Event event = session.createQuery(
+									"FROM Event e WHERE (:organizer IS NULL AND e.organizer IS NULL OR e.organizer = :organizer)",
+									Event.class
+							)
+							.setParameter( "organizer", organizer )
+							.setMaxResults( 1 )
+							.uniqueResult();
+					assertNotNull( event );
+
+					event = session.createQuery(
+									"FROM Event e WHERE (:organizer IS NULL AND e.organizer IS NULL OR e.organizer = :organizer)",
+									Event.class
+							)
+							.setParameter( "organizer", null )
+							.setMaxResults( 1 )
+							.uniqueResult();
+					assertNotNull( event );
+				}
+		);
+	}
+
+	@Entity(name = "Event")
+	@Table(name = "EVENT_TABLE")
+	public static class Event {
+		@Id
+		private Long id;
+
+		private String name;
+
+		@ManyToOne(fetch = FetchType.LAZY)
+		private Organizer organizer;
+
+		public Event() {
+		}
+
+		public Event(Long id, String name, Organizer organizer) {
+			this.id = id;
+			this.name = name;
+			this.organizer = organizer;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+
+		public Organizer getOrganizer() {
+			return organizer;
+		}
+
+		public void setOrganizer(Organizer organizer) {
+			this.organizer = organizer;
+		}
+	}
+
+	@Entity(name = "Organizer")
+	@Table(name = "ORGANIZER_TABLE")
+	public static class Organizer {
+		@Id
+		private Long id;
+
+		private String name;
+
+		public Organizer() {
+		}
+
+		public Organizer(Long id, String name) {
+			this.id = id;
+			this.name = name;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+	}
+}