HHH-9615 - Allow AttributeConverter on attributes marked as Lob

hibernate-core/src/main/java/org/hibernate/cfg/annotations/SimpleValueBinder.java

@@ -9,6 +9,7 @@ package org.hibernate.cfg.annotations;
 import java.io.Serializable;
 import java.util.Calendar;
 import java.util.Date;
+import java.util.Locale;
 import java.util.Properties;
 import javax.persistence.Enumerated;
 import javax.persistence.Id;
@@ -73,6 +74,7 @@ public class SimpleValueBinder {
 	private String defaultType = "";
 	private Properties typeParameters = new Properties();
 	private boolean isNationalized;
+	private boolean isLob;
 
 	private Table table;
 	private SimpleValue simpleValue;
@@ -134,6 +136,7 @@ public class SimpleValueBinder {
 			// we cannot guess anything
 			return;
 		}
+
 		XClass returnedClassOrElement = returnedClass;
 		boolean isArray = false;
 		if ( property.isArray() ) {
@@ -203,6 +206,7 @@ public class SimpleValueBinder {
 			explicitType = type;
 		}
 		else if ( !key && property.isAnnotationPresent( Lob.class ) ) {
+			isLob = true;
 			if ( buildingContext.getBuildingOptions().getReflectionManager().equals( returnedClassOrElement, java.sql.Clob.class ) ) {
 				type = isNationalized
 						? StandardBasicTypes.NCLOB.getName()
@@ -247,7 +251,7 @@ public class SimpleValueBinder {
 			else {
 				type = "blob";
 			}
-			explicitType = type;
+			defaultType = type;
 		}
 		else if ( ( !key && property.isAnnotationPresent( Enumerated.class ) )
 				|| ( key && property.isAnnotationPresent( MapKeyEnumerated.class ) ) ) {
@@ -389,6 +393,9 @@ public class SimpleValueBinder {
 		if ( isNationalized ) {
 			simpleValue.makeNationalized();
 		}
+		if ( isLob ) {
+			simpleValue.makeLob();
+		}
 
 		linkWithValue();
 
@@ -474,8 +481,21 @@ public class SimpleValueBinder {
 		}
 
 		if ( persistentClassName != null || attributeConverterDefinition != null ) {
+			try {
 				simpleValue.setTypeUsingReflection( persistentClassName, propertyName );
 			}
+			catch (Exception e) {
+				throw new MappingException(
+						String.format(
+								Locale.ROOT,
+								"Unable to determine basic type mapping via reflection [%s -> %s]",
+								persistentClassName,
+								propertyName
+						),
+						e
+				);
+			}
+		}
 
 		if ( !simpleValue.isTypeSpecified() && isVersion() ) {
 			simpleValue.setTypeName( "integer" );

hibernate-core/src/main/java/org/hibernate/mapping/SimpleValue.java

@@ -6,10 +6,13 @@
  */
 package org.hibernate.mapping;
 
+import java.io.Serializable;
 import java.lang.annotation.Annotation;
+import java.sql.Types;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
 import java.util.Properties;
 import javax.persistence.AttributeConverter;
 
@@ -34,11 +37,13 @@ import org.hibernate.internal.CoreMessageLogger;
 import org.hibernate.internal.util.ReflectHelper;
 import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.Type;
+import org.hibernate.type.descriptor.JdbcTypeNameMapper;
 import org.hibernate.type.descriptor.converter.AttributeConverterSqlTypeDescriptorAdapter;
 import org.hibernate.type.descriptor.converter.AttributeConverterTypeAdapter;
 import org.hibernate.type.descriptor.java.JavaTypeDescriptor;
 import org.hibernate.type.descriptor.java.JavaTypeDescriptorRegistry;
 import org.hibernate.type.descriptor.sql.JdbcTypeJavaClassMappings;
+import org.hibernate.type.descriptor.sql.LobTypeMappings;
 import org.hibernate.type.descriptor.sql.NationalizedTypeMappings;
 import org.hibernate.type.descriptor.sql.SqlTypeDescriptor;
 import org.hibernate.type.descriptor.sql.SqlTypeDescriptorRegistry;
@@ -60,6 +65,7 @@ public class SimpleValue implements KeyValue {
 	private String typeName;
 	private Properties typeParameters;
 	private boolean isNationalized;
+	private boolean isLob;
 
 	private Properties identifierGeneratorProperties;
 	private String identifierGeneratorStrategy = DEFAULT_ID_GEN_STRATEGY;
@@ -168,6 +174,14 @@ public class SimpleValue implements KeyValue {
 		return isNationalized;
 	}
 
+	public void makeLob() {
+		this.isLob = true;
+	}
+
+	public boolean isLob() {
+		return isLob;
+	}
+
 	public void setTable(Table table) {
 		this.table = table;
 	}
@@ -478,6 +492,26 @@ public class SimpleValue implements KeyValue {
 		// 		of ResultSets).  See JdbcTypeJavaClassMappings for details.  Again, given example, this should return
 		// 		VARCHAR/CHAR
 		int jdbcTypeCode = JdbcTypeJavaClassMappings.INSTANCE.determineJdbcTypeCodeForJavaClass( databaseColumnJavaType );
+		if ( isLob() ) {
+			if ( LobTypeMappings.INSTANCE.hasCorrespondingLobCode( jdbcTypeCode ) ) {
+				jdbcTypeCode = LobTypeMappings.INSTANCE.getCorrespondingLobCode( jdbcTypeCode );
+			}
+			else {
+				if ( Serializable.class.isAssignableFrom( entityAttributeJavaType ) ) {
+					jdbcTypeCode = Types.BLOB;
+				}
+				else {
+					throw new IllegalArgumentException(
+							String.format(
+									Locale.ROOT,
+									"JDBC type-code [%s (%s)] not known to have a corresponding LOB equivalent, and Java type is not Serializable (to use BLOB)",
+									jdbcTypeCode,
+									JdbcTypeNameMapper.getTypeName( jdbcTypeCode )
+							)
+					);
+				}
+			}
+		}
 		if ( isNationalized() ) {
 			jdbcTypeCode = NationalizedTypeMappings.INSTANCE.getCorrespondingNationalizedCode( jdbcTypeCode );
 		}

hibernate-core/src/main/java/org/hibernate/type/descriptor/sql/LobTypeMappings.java

@@ -0,0 +1,71 @@
+/*
+ * 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.type.descriptor.sql;
+
+import java.sql.Types;
+import java.util.Locale;
+import java.util.Map;
+
+import org.hibernate.internal.util.collections.BoundedConcurrentHashMap;
+import org.hibernate.type.descriptor.JdbcTypeNameMapper;
+
+import org.jboss.logging.Logger;
+
+/**
+ * @author Steve Ebersole
+ */
+public class LobTypeMappings {
+	private static final Logger log = Logger.getLogger( LobTypeMappings.class );
+
+	/**
+	 * Singleton access
+	 */
+	public static final LobTypeMappings INSTANCE = new LobTypeMappings();
+
+	private final Map<Integer,Integer> lobCodeByNonLobCode;
+
+	private LobTypeMappings() {
+		this.lobCodeByNonLobCode =  new BoundedConcurrentHashMap<Integer, Integer>();
+
+		// BLOB mappings
+		this.lobCodeByNonLobCode.put( Types.BLOB, Types.BLOB );
+		this.lobCodeByNonLobCode.put( Types.BINARY, Types.BLOB );
+		this.lobCodeByNonLobCode.put( Types.VARBINARY, Types.BLOB );
+		this.lobCodeByNonLobCode.put( Types.LONGVARBINARY, Types.BLOB );
+
+		// CLOB mappings
+		this.lobCodeByNonLobCode.put( Types.CLOB, Types.CLOB );
+		this.lobCodeByNonLobCode.put( Types.CHAR, Types.CLOB );
+		this.lobCodeByNonLobCode.put( Types.VARCHAR, Types.CLOB );
+		this.lobCodeByNonLobCode.put( Types.LONGVARCHAR, Types.CLOB );
+
+		// NCLOB mappings
+		this.lobCodeByNonLobCode.put( Types.NCLOB, Types.NCLOB );
+		this.lobCodeByNonLobCode.put( Types.NCHAR, Types.NCLOB );
+		this.lobCodeByNonLobCode.put( Types.NVARCHAR, Types.NCLOB );
+		this.lobCodeByNonLobCode.put( Types.LONGNVARCHAR, Types.NCLOB );
+	}
+
+	public boolean hasCorrespondingLobCode(int jdbcTypeCode) {
+		return lobCodeByNonLobCode.containsKey( jdbcTypeCode );
+	}
+
+	public int getCorrespondingLobCode(int jdbcTypeCode) {
+		Integer lobTypeCode = lobCodeByNonLobCode.get( jdbcTypeCode );
+		if ( lobTypeCode == null ) {
+			throw new IllegalArgumentException(
+					String.format(
+							Locale.ROOT,
+							"JDBC type-code [%s (%s)] not known to have a corresponding LOB equivalent",
+							jdbcTypeCode,
+							JdbcTypeNameMapper.getTypeName( jdbcTypeCode )
+					)
+			);
+		}
+		return lobTypeCode;
+	}
+}

hibernate-core/src/test/java/org/hibernate/test/converter/AndLobTest.java

@@ -0,0 +1,87 @@
+/*
+ * 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.test.converter;
+
+import java.sql.Types;
+import javax.persistence.AttributeConverter;
+import javax.persistence.Convert;
+import javax.persistence.Converter;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.Lob;
+
+import org.hibernate.boot.Metadata;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistry;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import org.hibernate.type.Type;
+import org.hibernate.type.descriptor.converter.AttributeConverterTypeAdapter;
+
+import org.hibernate.testing.junit4.BaseUnitTestCase;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.hibernate.testing.junit4.ExtraAssertions.assertTyping;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Test mapping a model with an attribute combining {@code @Lob} with an AttributeConverter.
+ * <p/>
+ * Originally developed to diagnose HHH-9615
+ *
+ * @author Steve Ebersole
+ */
+public class AndLobTest extends BaseUnitTestCase {
+	private StandardServiceRegistry ssr;
+
+	@Before
+	public void before() {
+		ssr = new StandardServiceRegistryBuilder().build();
+	}
+
+	@After
+	public void after() {
+		if ( ssr != null ) {
+			StandardServiceRegistryBuilder.destroy( ssr );
+		}
+	}
+
+	@Test
+	public void testMappingAttributeWithLobAndAttributeConverter() {
+		final Metadata metadata = new MetadataSources( ssr )
+				.addAnnotatedClass( EntityImpl.class )
+				.buildMetadata();
+
+		final Type type = metadata.getEntityBinding( EntityImpl.class.getName() ).getProperty( "status" ).getType();
+		final AttributeConverterTypeAdapter concreteType = assertTyping( AttributeConverterTypeAdapter.class, type );
+		assertEquals( Types.BLOB, concreteType.getSqlTypeDescriptor().getSqlType() );
+	}
+
+	@Converter
+	public static class ConverterImpl implements AttributeConverter<String, Integer> {
+		@Override
+		public Integer convertToDatabaseColumn(String attribute) {
+			return attribute.length();
+		}
+
+		@Override
+		public String convertToEntityAttribute(Integer dbData) {
+			return "";
+		}
+	}
+
+	@Entity
+	public static class EntityImpl {
+		@Id
+		private Integer id;
+
+		@Lob
+		@Convert(converter = ConverterImpl.class)
+		private String status;
+	}
+}