Fix Criteria#getResultType() returning Object class instead of null

hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmCriteriaNodeBuilder.java

@@ -245,7 +245,7 @@ public class SqmCriteriaNodeBuilder implements NodeBuilder, SqmCreationContext,
 		// to indicate that we do not know.  this will allow later
 		// calls to `SqmSelectStatement#select`, `SqmSelectStatement#multiSelect`,
 		// etc. to influence the result type
-		return new SqmSelectStatement<Object>( (Class) null, this );
+		return new SqmSelectStatement( Object.class, this );
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/query/sqm/tree/select/SqmSelectStatement.java

@@ -193,7 +193,7 @@ public class SqmSelectStatement<T> extends AbstractSqmSelectQuery<T> implements
 			checkSelectionIsJpaCompliant( selection );
 		}
 		getQuerySpec().setSelection( (JpaSelection<T>) selection );
-		if ( getResultType() == null ) {
+		if ( getResultType() == Object.class ) {
 			setResultType( (Class<T>) selection.getJavaType() );
 		}
 		return this;
@@ -209,7 +209,7 @@ public class SqmSelectStatement<T> extends AbstractSqmSelectQuery<T> implements
 		}
 		final Selection<? extends T> resultSelection;
 		Class<T> resultType = getResultType();
-		if ( resultType == null ) {
+		if ( resultType == Object.class ) {
 			setResultType( resultType = (Class<T>) Object[].class );
 		}
 		if ( Tuple.class.isAssignableFrom( resultType ) ) {

hibernate-core/src/test/java/org/hibernate/orm/test/jpa/compliance/CrtiteriaGetResultTypeTest.java

@@ -0,0 +1,76 @@
+package org.hibernate.orm.test.jpa.compliance;
+
+import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
+import org.hibernate.testing.orm.junit.Jpa;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import jakarta.persistence.Tuple;
+import jakarta.persistence.criteria.CriteriaQuery;
+
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@Jpa(
+		annotatedClasses = CrtiteriaGetResultTypeTest.Person.class
+)
+public class CrtiteriaGetResultTypeTest {
+
+	@Test
+	public void testObjectResultType(EntityManagerFactoryScope scope) {
+
+		scope.inEntityManager(
+				entityManager -> {
+					final CriteriaQuery query = entityManager.getCriteriaBuilder().createQuery();
+					final Class resultType = query.getResultType();
+
+					assertThat( resultType, notNullValue() );
+					assertEquals( Object.class.getName(), resultType.getName() );
+
+				}
+		);
+	}
+
+	@Test
+	public void testTupleResultType(EntityManagerFactoryScope scope) {
+
+		scope.inEntityManager(
+				entityManager -> {
+					final CriteriaQuery query = entityManager.getCriteriaBuilder().createQuery( Tuple.class );
+					final Class resultType = query.getResultType();
+
+					assertThat( resultType, notNullValue() );
+					assertEquals( Tuple.class.getName(), resultType.getName() );
+
+				}
+		);
+	}
+
+
+	@Test
+	public void testEntityResultType(EntityManagerFactoryScope scope) {
+
+		scope.inEntityManager(
+				entityManager -> {
+					final CriteriaQuery query = entityManager.getCriteriaBuilder().createQuery( Person.class );
+					final Class resultType = query.getResultType();
+
+					assertThat( resultType, notNullValue() );
+					assertEquals( Person.class.getName(), resultType.getName() );
+				}
+		);
+	}
+
+	@Entity(name = "Person")
+	@Table(name = "PERSON_TABLE")
+	public static class Person {
+		@Id
+		private Integer id;
+
+		private String name;
+	}
+
+}