HHH-8809 - Support @converter on Enumerations

(cherry picked from commit dd08640)

Author: sebersole

hibernate-entitymanager/src/test/java/org/hibernate/jpa/test/convert/ExplicitEnumConvertersTest.java

@@ -0,0 +1,148 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2014, Red Hat Inc. or third-party contributors as
+ * indicated by the @author tags or express copyright attribution
+ * statements applied by the authors.  All third-party contributions are
+ * distributed under license by Red Hat Inc.
+ *
+ * This copyrighted material is made available to anyone wishing to use, modify,
+ * copy, or redistribute it subject to the terms and conditions of the GNU
+ * Lesser General Public License, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this distribution; if not, write to:
+ * Free Software Foundation, Inc.
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA  02110-1301  USA
+ */
+package org.hibernate.jpa.test.convert;
+
+import java.net.MalformedURLException;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.persistence.AttributeConverter;
+import javax.persistence.Convert;
+import javax.persistence.Entity;
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.Id;
+
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.jpa.boot.spi.Bootstrap;
+import org.hibernate.jpa.test.PersistenceUnitDescriptorAdapter;
+import org.hibernate.persister.entity.EntityPersister;
+import org.hibernate.type.Type;
+import org.hibernate.type.descriptor.converter.AttributeConverterTypeAdapter;
+
+import org.hibernate.testing.TestForIssue;
+import org.junit.Test;
+
+import static org.hibernate.testing.junit4.ExtraAssertions.assertTyping;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author Steve Ebersole
+ */
+@TestForIssue( jiraKey = "HHH-8809" )
+public class ExplicitEnumConvertersTest {
+
+	// NOTE : initially unable to reproduce the reported problem
+
+	public static enum MediaType {
+		MUSIC,
+		VIDEO,
+		PHOTO,
+		MUSIC_STREAM,
+		VIDEO_STREAM
+	}
+
+	public static class MediaTypeConverter implements AttributeConverter<MediaType,String> {
+		@Override
+		public String convertToDatabaseColumn(MediaType attribute) {
+			callsToConverter++;
+			return attribute.name();
+		}
+
+		@Override
+		public MediaType convertToEntityAttribute(String dbData) {
+			callsToConverter++;
+			return MediaType.valueOf( dbData );
+		}
+	}
+
+	static int callsToConverter = 0;
+
+	@Entity( name = "Entity1" )
+	public static class Entity1 {
+		@Id
+		private Integer id;
+		private String name;
+		@Convert( converter = MediaTypeConverter.class )
+		private MediaType mediaType;
+
+		public Entity1() {
+		}
+
+		public Entity1(Integer id, String name, MediaType mediaType) {
+			this.id = id;
+			this.name = name;
+			this.mediaType = mediaType;
+		}
+	}
+
+	@Test
+	public void testSimpleConvertUsage() throws MalformedURLException {
+		final PersistenceUnitDescriptorAdapter pu = new PersistenceUnitDescriptorAdapter() {
+			@Override
+			public List<String> getManagedClassNames() {
+				return Arrays.asList( Entity1.class.getName() );
+			}
+		};
+
+		final Map settings = new HashMap();
+		settings.put( AvailableSettings.HBM2DDL_AUTO, "create-drop" );
+
+		EntityManagerFactory emf = Bootstrap.getEntityManagerFactoryBuilder( pu, settings ).build();
+		final EntityPersister ep = emf.unwrap( SessionFactoryImplementor.class ).getEntityPersister( Entity1.class.getName() );
+		final Type theDatePropertyType = ep.getPropertyType( "mediaType" );
+		final AttributeConverterTypeAdapter type = assertTyping( AttributeConverterTypeAdapter.class, theDatePropertyType );
+		assertTyping( MediaTypeConverter.class, type.getAttributeConverter() );
+
+		try {
+			EntityManager em = emf.createEntityManager();
+			em.getTransaction().begin();
+			em.persist( new Entity1( 1, "300", MediaType.VIDEO ) );
+			em.getTransaction().commit();
+			em.close();
+
+			assertEquals( 1, callsToConverter );
+
+			em = emf.createEntityManager();
+			em.getTransaction().begin();
+			em.find( Entity1.class, 1 );
+			em.getTransaction().commit();
+			em.close();
+
+			assertEquals( 2, callsToConverter );
+
+			em = emf.createEntityManager();
+			em.getTransaction().begin();
+			em.createQuery( "delete Entity1" ).executeUpdate();
+			em.getTransaction().commit();
+			em.close();
+		}
+		finally {
+			emf.close();
+		}
+	}
+}