HHH-16457 Add test for issue

hibernate-core/src/test/java17/org/hibernate/orm/test/records/EmbeddableInstantiatorTest.java

@@ -0,0 +1,98 @@
+package org.hibernate.orm.test.records;
+
+import java.time.LocalDate;
+
+import org.hibernate.annotations.EmbeddableInstantiator;
+import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.metamodel.spi.ValueAccess;
+
+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.Test;
+
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@DomainModel(
+		annotatedClasses = {
+				EmbeddableInstantiatorTest.Wrapper.class
+		}
+)
+@SessionFactory
+@TestForIssue(jiraKey = "HHH-16457")
+public class EmbeddableInstantiatorTest {
+
+	@Test
+	public void writesAndReadsInstantiatedEmbeddable(SessionFactoryScope scope) {
+
+		Wrapper wrapper = new Wrapper();
+		LocalDate aValue = LocalDate.now();
+		String bValue = "Foo";
+		int cValue = 1;
+
+		wrapper.myRecord = new MyRecord( cValue, bValue, aValue );
+
+		scope.inTransaction(
+				session -> {
+					session.persist( wrapper );
+				}
+		);
+
+		scope.inTransaction(
+				session -> {
+					Wrapper result = session.find( Wrapper.class, wrapper.id );
+					assertThat( result ).isNotNull();
+
+					assertThat(result.id).isEqualTo( cValue );
+
+					MyRecord myRecord = result.myRecord;
+					assertThat( myRecord ).isNotNull();
+
+					assertThat(myRecord.c).isEqualTo( cValue );
+					assertThat(myRecord.b).isEqualTo( bValue );
+					assertThat(myRecord.a).isEqualTo( aValue );
+				}
+		);
+	}
+
+	@Embeddable
+	@EmbeddableInstantiator(MyRecord.MyRecordInstantiator.class)
+	public record MyRecord(int c, String b, LocalDate a) {
+
+		public static class MyRecordInstantiator implements org.hibernate.metamodel.spi.EmbeddableInstantiator {
+
+			@Override
+			public boolean isInstance(Object object, SessionFactoryImplementor sessionFactory) {
+				return MyRecord.class.isInstance( object );
+			}
+
+			@Override
+			public boolean isSameClass(Object object, SessionFactoryImplementor sessionFactory) {
+				return MyRecord.class.equals( object.getClass() );
+			}
+
+			@Override
+			public Object instantiate(ValueAccess valueAccess, SessionFactoryImplementor sessionFactory) {
+				return new MyRecord( valueAccess.getValue( 2, Integer.class ), valueAccess.getValue( 1, String.class ),
+									 valueAccess.getValue( 0, LocalDate.class )
+				);
+			}
+		}
+	}
+
+	@Entity
+	public static class Wrapper {
+
+		@Id
+		@GeneratedValue
+		Long id;
+
+		MyRecord myRecord;
+	}
+}