HHH-8804 - Ability to use parametrized type as AttributeConverter type parameter

hibernate-core/src/main/java/org/hibernate/cfg/AttributeConverterDefinition.java

@@ -26,12 +26,12 @@ package org.hibernate.cfg;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
 import java.lang.reflect.TypeVariable;
-
 import javax.persistence.AttributeConverter;
 import javax.persistence.Converter;
 
 import org.hibernate.AnnotationException;
 import org.hibernate.AssertionFailure;
+
 import org.jboss.logging.Logger;
 
 /**
@@ -201,7 +201,8 @@ public class AttributeConverterDefinition {
 	private static Class extractClass(Type type) {
 		if ( type instanceof Class ) {
 			return (Class) type;
-		} else if (type instanceof ParameterizedType) {
+		}
+		else if ( type instanceof ParameterizedType ) {
 			return extractClass( ( (ParameterizedType) type ).getRawType() );
 		}
 		return null;

hibernate-core/src/test/java/org/hibernate/test/type/ParameterizedAttributeConverterParameterTypeTest.java

@@ -1,27 +1,27 @@
-package org.hibernate.test.cfg;
-
-import static org.junit.Assert.assertEquals;
+package org.hibernate.test.type;
 
 import java.util.ArrayList;
 import java.util.List;
-
 import javax.persistence.AttributeConverter;
 
 import org.hibernate.cfg.AttributeConverterDefinition;
+
 import org.hibernate.testing.TestForIssue;
 import org.hibernate.testing.junit4.BaseUnitTestCase;
 import org.junit.Test;
 
+import static org.junit.Assert.assertEquals;
+
 /**
- * Tests creation of AttributeConverterDefinition instances and
- * the classes of the extracted type arguments
+ * Test the ability to interpret and understand AttributeConverter impls which
+ * use parameterized types as one of (typically the "attribute type") its parameter types.
  * 
  * @author Svein Baardsen
+ * @author Steve Ebersole
  */
-public class AttributeConverterDefinitionTest extends BaseUnitTestCase {
+public class ParameterizedAttributeConverterParameterTypeTest extends BaseUnitTestCase {
 
 	public static class CustomAttributeConverter implements AttributeConverter<List<String>, Integer> {
-
 		@Override
 		public Integer convertToDatabaseColumn(List<String> attribute) {
 			return attribute.size();
@@ -31,7 +31,6 @@ public class AttributeConverterDefinitionTest extends BaseUnitTestCase {
 		public List<String> convertToEntityAttribute(Integer dbData) {
 			return new ArrayList<String>(dbData);
 		}
-		
 	}
 	
 	@Test