From 02c11514fc4443cb160f1b571a711b34b80ae533 Mon Sep 17 00:00:00 2001
From: Cedomir Igaly <cedomir.igaly@e-dama.net>
Date: Thu, 1 Jun 2023 09:14:05 +0200
Subject: [PATCH] HHH-16781 - Test case showing the problem

---
 .../type/OverrideStandardJavaTypeTest.java    | 159 ++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 hibernate-core/src/test/java/org/hibernate/orm/test/type/OverrideStandardJavaTypeTest.java

diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/type/OverrideStandardJavaTypeTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/type/OverrideStandardJavaTypeTest.java
new file mode 100644
index 0000000000..2e70426850
--- /dev/null
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/type/OverrideStandardJavaTypeTest.java
@@ -0,0 +1,159 @@
+package org.hibernate.orm.test.type;
+
+import java.util.Comparator;
+import java.util.Locale;
+
+import org.hibernate.annotations.JavaType;
+import org.hibernate.metamodel.spi.MappingMetamodelImplementor;
+import org.hibernate.persister.entity.EntityPersister;
+import org.hibernate.type.descriptor.WrapperOptions;
+import org.hibernate.type.descriptor.java.AbstractClassJavaType;
+import org.hibernate.type.descriptor.jdbc.JdbcType;
+import org.hibernate.type.descriptor.jdbc.JdbcTypeIndicators;
+import org.hibernate.type.descriptor.jdbc.VarcharJdbcType;
+
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+
+@DomainModel(annotatedClasses = { OverrideStandardJavaTypeTest.SampleEntity.class })
+@SessionFactory
+@JiraKey("HHH-16781")
+public class OverrideStandardJavaTypeTest {
+
+	@Test
+	public void verifyMappings(SessionFactoryScope scope) {
+		final MappingMetamodelImplementor mappingMetamodel = scope.getSessionFactory()
+				.getRuntimeMetamodels()
+				.getMappingMetamodel();
+		final EntityPersister entityDescriptor = mappingMetamodel.findEntityDescriptor( SampleEntity.class );
+
+		final var languageJavaTypeDescriptor = entityDescriptor.findAttributeMapping( "language" )
+				.getSingleJdbcMapping().getJavaTypeDescriptor();
+		assertInstanceOf( LocaleAsLanguageTagType.class, languageJavaTypeDescriptor );
+	}
+
+	@Test
+	public void validateJpa(SessionFactoryScope scope) {
+		final var id = scope.fromTransaction(
+				session -> {
+					final var entity = new SampleEntity();
+					entity.language = Locale.forLanguageTag( "en-Latn" );
+					session.persist( entity );
+					return entity.id;
+				}
+		);
+		scope.inSession(
+				session -> assertEquals(
+						Locale.forLanguageTag( "en-Latn" ),
+						session.find( SampleEntity.class, id ).language
+				)
+		);
+	}
+
+	@Test
+	public void validateNative(SessionFactoryScope scope) {
+		final var id = scope.fromTransaction(
+				session -> {
+					final var entity = new SampleEntity();
+					entity.language = Locale.forLanguageTag( "en-Latn" );
+					session.persist( entity );
+					return entity.id;
+				}
+		);
+		scope.inSession(
+				session ->
+						assertEquals(
+								"en-Latn",
+								session.createNativeQuery(
+												"select language from locale_as_language_tag where id=:id", String.class )
+										.setParameter( "id", id )
+										.getSingleResult()
+						)
+		);
+	}
+
+
+	@Entity
+	@Table(name = "locale_as_language_tag")
+	public static class SampleEntity {
+
+		@Id
+		@GeneratedValue
+		private Integer id;
+
+		@JavaType(LocaleAsLanguageTagType.class)
+		private Locale language;
+	}
+
+	public static class LocaleAsLanguageTagType extends AbstractClassJavaType<Locale> {
+
+		public static final LocaleAsLanguageTagType INSTANCE = new LocaleAsLanguageTagType();
+
+		public static class LocaleComparator implements Comparator<Locale> {
+
+			public static final LocaleComparator INSTANCE = new LocaleComparator();
+
+			@Override
+			public int compare(Locale o1, Locale o2) {
+				return o1.toString().compareTo( o2.toString() );
+			}
+		}
+
+		LocaleAsLanguageTagType() {
+			super( Locale.class );
+		}
+
+		@Override
+		public Comparator<Locale> getComparator() {
+			return LocaleComparator.INSTANCE;
+		}
+
+		@Override
+		public String toString(Locale value) {
+			return value.toLanguageTag();
+		}
+
+		private Locale fromString(String string) {
+			return Locale.forLanguageTag( string );
+		}
+
+		@Override
+		@SuppressWarnings({ "unchecked" })
+		public <X> X unwrap(Locale value, Class<X> type, WrapperOptions options) {
+			if ( value == null ) {
+				return null;
+			}
+			if ( String.class.isAssignableFrom( type ) ) {
+				return (X) toString( value );
+			}
+			throw unknownUnwrap( type );
+		}
+
+		@Override
+		public <X> Locale wrap(X value, WrapperOptions options) {
+			if ( value == null ) {
+				return null;
+			}
+			if ( value instanceof String ) {
+				return fromString( (String) value );
+			}
+			throw unknownWrap( value.getClass() );
+		}
+
+		@Override
+		public JdbcType getRecommendedJdbcType(final JdbcTypeIndicators indicators) {
+			return VarcharJdbcType.INSTANCE;
+		}
+	}
+}