HHH-6392 Starting to refactor JandexHelper

hibernate-core/src/main/java/org/hibernate/metamodel/source/annotations/entity/EntityBinder.java

@@ -206,7 +206,7 @@ public class EntityBinder {
 		);
 		if ( whereAnnotation != null ) {
 			// no null check needed, it is a required attribute
-			entityBindingState.setWhereFilter( JandexHelper.getValueAsString( whereAnnotation, "clause" ) );
+			entityBindingState.setWhereFilter( JandexHelper.getValue( whereAnnotation, "clause", String.class ) );
 		}
 	}
 
@@ -409,9 +409,9 @@ public class EntityBinder {
 				entityClass.getClassInfo(), JPADotNames.TABLE
 		);
 		if ( tableAnnotation != null ) {
-			schemaName = JandexHelper.getValueAsString( tableAnnotation, "schema" );
+			schemaName = JandexHelper.getValue( tableAnnotation, "schema", String.class);
-			catalogName = JandexHelper.getValueAsString( tableAnnotation, "catalog" );
+			catalogName = JandexHelper.getValue( tableAnnotation, "catalog", String.class );
-			String explicitTableName = JandexHelper.getValueAsString( tableAnnotation, "name" );
+			String explicitTableName = JandexHelper.getValue( tableAnnotation, "name", String.class );
 			if ( StringHelper.isNotEmpty( explicitTableName ) ) {
 				tableName = meta.getNamingStrategy().tableName( explicitTableName );
 			}
@@ -569,7 +569,7 @@ public class EntityBinder {
 					)
 			);
 		}
-		String generator = JandexHelper.getValueAsString( generatedValueAnn, "generator" );
+		String generator = JandexHelper.getValue( generatedValueAnn, "generator", String.class );
 		IdGenerator idGenerator = null;
 		if ( StringHelper.isNotEmpty( generator ) ) {
 			idGenerator = meta.getIdGenerator( generator );

hibernate-core/src/main/java/org/hibernate/metamodel/source/annotations/global/FetchProfileBinder.java

@@ -57,29 +57,33 @@ public class FetchProfileBinder {
 			bind( metadata, fetchProfile );
 		}
 		for ( AnnotationInstance fetchProfiles : jandex.getAnnotations( HibernateDotNames.FETCH_PROFILES ) ) {
-			for ( AnnotationInstance fetchProfile : JandexHelper.getValueAsArray( fetchProfiles, "value" ) ) {
+			AnnotationInstance[] fetchProfileAnnotations = JandexHelper.getValue(
+					fetchProfiles,
+					"value",
+					AnnotationInstance[].class
+			);
+			for ( AnnotationInstance fetchProfile : fetchProfileAnnotations ) {
 				bind( metadata, fetchProfile );
 			}
 		}
 	}
 
 	private static void bind(MetadataImplementor metadata, AnnotationInstance fetchProfile) {
-		String name = JandexHelper.getValueAsString( fetchProfile, "name" );
+		String name = JandexHelper.getValue( fetchProfile, "name", String.class );
 		Set<Fetch> fetches = new HashSet<Fetch>();
-		for ( AnnotationInstance override : JandexHelper.getValueAsArray( fetchProfile, "fetchOverrides" ) ) {
+		AnnotationInstance[] overrideAnnotations = JandexHelper.getValue(
+				fetchProfile,
+				"fetchOverrides",
+				AnnotationInstance[].class
+		);
+		for ( AnnotationInstance override : overrideAnnotations ) {
 			FetchMode fetchMode = JandexHelper.getValueAsEnum( override, "mode", FetchMode.class );
 			if ( !fetchMode.equals( org.hibernate.annotations.FetchMode.JOIN ) ) {
 				throw new MappingException( "Only FetchMode.JOIN is currently supported" );
 			}
-			fetches.add(
+			String entityName = JandexHelper.getValue( override, "entity", String.class );
-					new Fetch(
+			String associationName = JandexHelper.getValue( override, "association", String.class );
-							JandexHelper.getValueAsString( override, "entity" ), JandexHelper.getValueAsString(
+			fetches.add( new Fetch( entityName, associationName, fetchMode.toString().toLowerCase() ) );
-									override,
-									"association"
-							),
-							fetchMode.toString().toLowerCase()
-					)
-			);
 		}
 		metadata.addFetchProfile( new FetchProfile( name, fetches ) );
 	}

hibernate-core/src/main/java/org/hibernate/metamodel/source/annotations/global/FilterDefBinder.java

@@ -57,25 +57,30 @@ public class FilterDefBinder {
 			bind( metadata, filterDef );
 		}
 		for ( AnnotationInstance filterDefs : jandex.getAnnotations( HibernateDotNames.FILTER_DEFS ) ) {
-			for ( AnnotationInstance filterDef : JandexHelper.getValueAsArray( filterDefs, "value" ) ) {
+			AnnotationInstance[] filterDefAnnotations = JandexHelper.getValue(
+					filterDefs,
+					"value",
+					AnnotationInstance[].class
+			);
+			for ( AnnotationInstance filterDef : filterDefAnnotations ) {
 				bind( metadata, filterDef );
 			}
 		}
 	}
 
 	private static void bind(MetadataImplementor metadata, AnnotationInstance filterDef) {
-		String name = JandexHelper.getValueAsString( filterDef, "name" );
+		String name = JandexHelper.getValue( filterDef, "name", String.class );
 		Map<String, Type> prms = new HashMap<String, Type>();
-		for ( AnnotationInstance prm : JandexHelper.getValueAsArray( filterDef, "parameters" ) ) {
+		for ( AnnotationInstance prm : JandexHelper.getValue( filterDef, "parameters", AnnotationInstance[].class ) ) {
 			prms.put(
-					JandexHelper.getValueAsString( prm, "name" ),
+					JandexHelper.getValue( prm, "name", String.class ),
-					metadata.getTypeResolver().heuristicType( JandexHelper.getValueAsString( prm, "type" ) )
+					metadata.getTypeResolver().heuristicType( JandexHelper.getValue( prm, "type", String.class ) )
 			);
 		}
 		metadata.addFilterDefinition(
 				new FilterDefinition(
 						name,
-						JandexHelper.getValueAsString( filterDef, "defaultCondition" ),
+						JandexHelper.getValue( filterDef, "defaultCondition", String.class ),
 						prms
 				)
 		);

hibernate-core/src/main/java/org/hibernate/metamodel/source/annotations/global/IdGeneratorBinder.java

@@ -23,10 +23,10 @@
  */
 package org.hibernate.metamodel.source.annotations.global;
 
-import javax.persistence.GenerationType;
-import javax.persistence.SequenceGenerator;
 import java.util.HashMap;
 import java.util.Map;
+import javax.persistence.GenerationType;
+import javax.persistence.SequenceGenerator;
 
 import org.jboss.jandex.AnnotationInstance;
 import org.jboss.jandex.Index;
@@ -64,7 +64,7 @@ public class IdGeneratorBinder {
 										   String element,
 										   Map<String, String> parameters,
 										   String parameter) {
-		String string = JandexHelper.getValueAsString( annotation, element );
+		String string = JandexHelper.getValue( annotation, element, String.class );
 		if ( StringHelper.isNotEmpty( string ) ) {
 			parameters.put( parameter, string );
 		}
@@ -88,30 +88,42 @@ public class IdGeneratorBinder {
 			bindGenericGenerator( metadata, generator );
 		}
 		for ( AnnotationInstance generators : jandex.getAnnotations( HibernateDotNames.GENERIC_GENERATORS ) ) {
-			for ( AnnotationInstance generator : JandexHelper.getValueAsArray( generators, "value" ) ) {
+			for ( AnnotationInstance generator : JandexHelper.getValue(
+					generators,
+					"value",
+					AnnotationInstance[].class
+			) ) {
 				bindGenericGenerator( metadata, generator );
 			}
 		}
 	}
 
 	private static void bindGenericGenerator(MetadataImplementor metadata, AnnotationInstance generator) {
-		String name = JandexHelper.getValueAsString( generator, "name" );
+		String name = JandexHelper.getValue( generator, "name", String.class );
-		Map<String, String> prms = new HashMap<String, String>();
+		Map<String, String> parameterMap = new HashMap<String, String>();
-		for ( AnnotationInstance prm : JandexHelper.getValueAsArray( generator, "parameters" ) ) {
+		AnnotationInstance[] parameterAnnotations = JandexHelper.getValue(
-			prms.put( JandexHelper.getValueAsString( prm, "name" ), JandexHelper.getValueAsString( prm, "value" ) );
+				generator,
+				"parameters",
+				AnnotationInstance[].class
+		);
+		for ( AnnotationInstance parameterAnnotation : parameterAnnotations ) {
+			parameterMap.put(
+					JandexHelper.getValue( parameterAnnotation, "name", String.class ),
+					JandexHelper.getValue( parameterAnnotation, "value", String.class )
+			);
 		}
 		metadata.addIdGenerator(
 				new IdGenerator(
 						name,
-						JandexHelper.getValueAsString( generator, "strategy" ),
+						JandexHelper.getValue( generator, "strategy", String.class ),
-						prms
+						parameterMap
 				)
 		);
 		LOG.tracef( "Add generic generator with name: %s", name );
 	}
 
 	private static void bindSequenceGenerator(MetadataImplementor metadata, AnnotationInstance generator) {
-		String name = JandexHelper.getValueAsString( generator, "name" );
+		String name = JandexHelper.getValue( generator, "name", String.class );
 		String strategy;
 		Map<String, String> prms = new HashMap<String, String>();
 		addStringParameter( generator, "sequenceName", prms, SequenceStyleGenerator.SEQUENCE_PARAM );
@@ -122,20 +134,20 @@ public class IdGeneratorBinder {
 			addStringParameter( generator, "schema", prms, PersistentIdentifierGenerator.SCHEMA );
 			prms.put(
 					SequenceStyleGenerator.INCREMENT_PARAM,
-					String.valueOf( JandexHelper.getValueAsInt( generator, "allocationSize" ) )
+					String.valueOf( JandexHelper.getValue( generator, "allocationSize", Integer.class ) )
 			);
 			prms.put(
 					SequenceStyleGenerator.INITIAL_PARAM,
-					String.valueOf( JandexHelper.getValueAsInt( generator, "initialValue" ) )
+					String.valueOf( JandexHelper.getValue( generator, "initialValue", Integer.class ) )
 			);
 		}
 		else {
-			if ( JandexHelper.getValueAsInt( generator, "initialValue" ) != 1 ) {
+			if ( JandexHelper.getValue( generator, "initialValue", Integer.class ) != 1 ) {
 				LOG.unsupportedInitialValue( AvailableSettings.USE_NEW_ID_GENERATOR_MAPPINGS );
 			}
 			prms.put(
 					SequenceHiLoGenerator.MAX_LO,
-					String.valueOf( JandexHelper.getValueAsInt( generator, "allocationSize" ) - 1 )
+					String.valueOf( JandexHelper.getValue( generator, "allocationSize", Integer.class ) - 1 )
 			);
 		}
 		metadata.addIdGenerator( new IdGenerator( name, strategy, prms ) );
@@ -143,7 +155,7 @@ public class IdGeneratorBinder {
 	}
 
 	private static void bindTableGenerator(MetadataImplementor metadata, AnnotationInstance generator) {
-		String name = JandexHelper.getValueAsString( generator, "name" );
+		String name = JandexHelper.getValue( generator, "name", String.class );
 		String strategy;
 		Map<String, String> prms = new HashMap<String, String>();
 		addStringParameter( generator, "catalog", prms, PersistentIdentifierGenerator.CATALOG );
@@ -158,11 +170,11 @@ public class IdGeneratorBinder {
 			addStringParameter( generator, "valueColumnName", prms, TableGenerator.VALUE_COLUMN_PARAM );
 			prms.put(
 					TableGenerator.INCREMENT_PARAM,
-					String.valueOf( JandexHelper.getValueAsInt( generator, "allocationSize" ) )
+					String.valueOf( JandexHelper.getValue( generator, "allocationSize", String.class ) )
 			);
 			prms.put(
 					TableGenerator.INITIAL_PARAM,
-					String.valueOf( JandexHelper.getValueAsInt( generator, "initialValue" ) + 1 )
+					String.valueOf( JandexHelper.getValue( generator, "initialValue", String.class ) + 1 )
 			);
 		}
 		else {
@@ -172,10 +184,10 @@ public class IdGeneratorBinder {
 			addStringParameter( generator, "valueColumnName", prms, MultipleHiLoPerTableGenerator.VALUE_COLUMN_NAME );
 			prms.put(
 					TableHiLoGenerator.MAX_LO,
-					String.valueOf( JandexHelper.getValueAsInt( generator, "allocationSize" ) - 1 )
+					String.valueOf( JandexHelper.getValue( generator, "allocationSize", Integer.class ) - 1 )
 			);
 		}
-		if ( JandexHelper.getValueAsArray( generator, "uniqueConstraints" ).length > 0 ) {
+		if ( JandexHelper.getValue( generator, "uniqueConstraints", AnnotationInstance[].class ).length > 0 ) {
 			LOG.ignoringTableGeneratorConstraints( name );
 		}
 		metadata.addIdGenerator( new IdGenerator( name, strategy, prms ) );

hibernate-core/src/main/java/org/hibernate/metamodel/source/annotations/global/QueryBinder.java

@@ -74,7 +74,7 @@ public class QueryBinder {
 			bindNamedQuery( metadata, query );
 		}
 		for ( AnnotationInstance queries : jandex.getAnnotations( JPADotNames.NAMED_QUERIES ) ) {
-			for ( AnnotationInstance query : JandexHelper.getValueAsArray( queries, "value" ) ) {
+			for ( AnnotationInstance query : JandexHelper.getValue( queries, "value", AnnotationInstance[].class ) ) {
 				bindNamedQuery( metadata, query );
 			}
 		}
@@ -82,7 +82,7 @@ public class QueryBinder {
 			bindNamedNativeQuery( metadata, query );
 		}
 		for ( AnnotationInstance queries : jandex.getAnnotations( JPADotNames.NAMED_NATIVE_QUERIES ) ) {
-			for ( AnnotationInstance query : JandexHelper.getValueAsArray( queries, "value" ) ) {
+			for ( AnnotationInstance query : JandexHelper.getValue( queries, "value", AnnotationInstance[].class ) ) {
 				bindNamedNativeQuery( metadata, query );
 			}
 		}
@@ -90,7 +90,7 @@ public class QueryBinder {
 			bindNamedQuery( metadata, query );
 		}
 		for ( AnnotationInstance queries : jandex.getAnnotations( HibernateDotNames.NAMED_QUERIES ) ) {
-			for ( AnnotationInstance query : JandexHelper.getValueAsArray( queries, "value" ) ) {
+			for ( AnnotationInstance query : JandexHelper.getValue( queries, "value", AnnotationInstance[].class ) ) {
 				bindNamedQuery( metadata, query );
 			}
 		}
@@ -98,7 +98,7 @@ public class QueryBinder {
 			bindNamedNativeQuery( metadata, query );
 		}
 		for ( AnnotationInstance queries : jandex.getAnnotations( HibernateDotNames.NAMED_NATIVE_QUERIES ) ) {
-			for ( AnnotationInstance query : JandexHelper.getValueAsArray( queries, "value" ) ) {
+			for ( AnnotationInstance query : JandexHelper.getValue( queries, "value", AnnotationInstance[].class ) ) {
 				bindNamedNativeQuery( metadata, query );
 			}
 		}
@@ -111,14 +111,14 @@ public class QueryBinder {
 	 * @param annotation the named query annotation
 	 */
 	private static void bindNamedQuery(MetadataImplementor metadata, AnnotationInstance annotation) {
-		String name = JandexHelper.getValueAsString( annotation, "name" );
+		String name = JandexHelper.getValue( annotation, "name", String.class );
 		if ( StringHelper.isEmpty( name ) ) {
 			throw new AnnotationException( "A named query must have a name when used in class or package level" );
 		}
 
-		String query = JandexHelper.getValueAsString( annotation, "query" );
+		String query = JandexHelper.getValue( annotation, "query", String.class );
 
-		AnnotationInstance[] hints = JandexHelper.getValueAsArray( annotation, "hints" );
+		AnnotationInstance[] hints = JandexHelper.getValue( annotation, "hints", AnnotationInstance[].class );
 
 		String cacheRegion = getString( hints, QueryHints.CACHE_REGION );
 		if ( StringHelper.isEmpty( cacheRegion ) ) {
@@ -153,16 +153,16 @@ public class QueryBinder {
 	}
 
 	private static void bindNamedNativeQuery(MetadataImplementor metadata, AnnotationInstance annotation) {
-		String name = JandexHelper.getValueAsString( annotation, "name" );
+		String name = JandexHelper.getValue( annotation, "name", String.class );
 		if ( StringHelper.isEmpty( name ) ) {
 			throw new AnnotationException( "A named native query must have a name when used in class or package level" );
 		}
 
-		String query = JandexHelper.getValueAsString( annotation, "query" );
+		String query = JandexHelper.getValue( annotation, "query", String.class );
 
-		String resultSetMapping = JandexHelper.getValueAsString( annotation, "resultSetMapping" );
+		String resultSetMapping = JandexHelper.getValue( annotation, "resultSetMapping", String.class );
 
-		AnnotationInstance[] hints = JandexHelper.getValueAsArray( annotation, "hints" );
+		AnnotationInstance[] hints = JandexHelper.getValue( annotation, "hints", AnnotationInstance[].class );
 
 		boolean cacheable = getBoolean( hints, "org.hibernate.cacheable", name );
 		String cacheRegion = getString( hints, QueryHints.CACHE_REGION );
@@ -309,8 +309,8 @@ public class QueryBinder {
 
 	private static String getString(AnnotationInstance[] hints, String element) {
 		for ( AnnotationInstance hint : hints ) {
-			if ( element.equals( JandexHelper.getValue( hint, "name" ) ) ) {
+			if ( element.equals( JandexHelper.getValue( hint, "name", String.class ) ) ) {
-				return JandexHelper.getValueAsString( hint, "value" );
+				return JandexHelper.getValue( hint, "value", String.class );
 			}
 		}
 		return null;

hibernate-core/src/main/java/org/hibernate/metamodel/source/annotations/global/TableBinder.java

@@ -63,14 +63,14 @@ public class TableBinder {
 			bind( metadata, tableAnnotation );
 		}
 		for ( AnnotationInstance tables : jandex.getAnnotations( HibernateDotNames.TABLES ) ) {
-			for ( AnnotationInstance table : JandexHelper.getValueAsArray( tables, "value" ) ) {
+			for ( AnnotationInstance table : JandexHelper.getValue( tables, "value", AnnotationInstance[].class ) ) {
 				bind( metadata, table );
 			}
 		}
 	}
 
 	private static void bind(MetadataImplementor metadata, AnnotationInstance tableAnnotation) {
-		String tableName = JandexHelper.getValueAsString( tableAnnotation, "appliesTo" );
+		String tableName = JandexHelper.getValue( tableAnnotation, "appliesTo", String.class );
 		ObjectName objectName = new ObjectName( tableName );
 		Schema schema = metadata.getDatabase().getSchema( objectName.getSchema(), objectName.getCatalog() );
 		Table table = schema.getTable( objectName.getName() );
@@ -80,18 +80,22 @@ public class TableBinder {
 	}
 
 	private static void bindHibernateTableAnnotation(Table table, AnnotationInstance tableAnnotation) {
-		for ( AnnotationInstance indexAnnotation : JandexHelper.getValueAsArray( tableAnnotation, "indexes" ) ) {
+		for ( AnnotationInstance indexAnnotation : JandexHelper.getValue(
+				tableAnnotation,
+				"indexes",
+				AnnotationInstance[].class
+		) ) {
 			bindIndexAnnotation( table, indexAnnotation );
 		}
-		String comment = JandexHelper.getValueAsString( tableAnnotation, "comment" );
+		String comment = JandexHelper.getValue( tableAnnotation, "comment", String.class );
 		if ( StringHelper.isNotEmpty( comment ) ) {
 			table.addComment( comment.trim() );
 		}
 	}
 
 	private static void bindIndexAnnotation(Table table, AnnotationInstance indexAnnotation) {
-		String indexName = JandexHelper.getValueAsString( indexAnnotation, "appliesTo" );
+		String indexName = JandexHelper.getValue( indexAnnotation, "appliesTo", String.class );
-		String[] columnNames = (String[]) JandexHelper.getValue( indexAnnotation, "columnNames" );
+		String[] columnNames = JandexHelper.getValue( indexAnnotation, "columnNames", String[].class );
 		if ( columnNames == null ) {
 			LOG.noColumnsSpecifiedForIndex( indexName, table.toLoggableString() );
 			return;

hibernate-core/src/main/java/org/hibernate/metamodel/source/annotations/global/TypeDefBinder.java

@@ -57,33 +57,50 @@ public class TypeDefBinder {
 			bind( metadata, typeDef );
 		}
 		for ( AnnotationInstance typeDefs : jandex.getAnnotations( HibernateDotNames.TYPE_DEFS ) ) {
-			for ( AnnotationInstance typeDef : JandexHelper.getValueAsArray( typeDefs, "value" ) ) {
+			AnnotationInstance[] typeDefAnnotations = JandexHelper.getValue(
+					typeDefs,
+					"value",
+					AnnotationInstance[].class
+			);
+			for ( AnnotationInstance typeDef : typeDefAnnotations ) {
 				bind( metadata, typeDef );
 			}
 		}
 	}
 
-	private static void bind(MetadataImplementor metadata, AnnotationInstance typeDef) {
+	private static void bind(MetadataImplementor metadata, AnnotationInstance typeDefAnnotation) {
-		String name = JandexHelper.getValueAsString( typeDef, "name" );
+		String name = JandexHelper.getValue( typeDefAnnotation, "name", String.class );
-		String defaultForType = JandexHelper.getValueAsString( typeDef, "defaultForType" );
+		String defaultForType = JandexHelper.getValue( typeDefAnnotation, "defaultForType", String.class );
-		String typeClass = JandexHelper.getValueAsString( typeDef, "typeClass" );
+		String typeClass = JandexHelper.getValue( typeDefAnnotation, "typeClass", String.class );
+
 		boolean noName = StringHelper.isEmpty( name );
 		boolean noDefaultForType = defaultForType == null || defaultForType.equals( void.class.getName() );
+
 		if ( noName && noDefaultForType ) {
 			throw new AnnotationException(
 					"Either name or defaultForType (or both) attribute should be set in TypeDef having typeClass "
 							+ typeClass
 			);
 		}
-		Map<String, String> prms = new HashMap<String, String>();
+
-		for ( AnnotationInstance prm : JandexHelper.getValueAsArray( typeDef, "parameters" ) ) {
+		Map<String, String> parameterMaps = new HashMap<String, String>();
-			prms.put( JandexHelper.getValueAsString( prm, "name" ), JandexHelper.getValueAsString( prm, "value" ) );
+		AnnotationInstance[] parameterAnnotations = JandexHelper.getValue(
+				typeDefAnnotation,
+				"parameters",
+				AnnotationInstance[].class
+		);
+		for ( AnnotationInstance parameterAnnotation : parameterAnnotations ) {
+			parameterMaps.put(
+					JandexHelper.getValue( parameterAnnotation, "name", String.class ),
+					JandexHelper.getValue( parameterAnnotation, "value", String.class )
+			);
 		}
+
 		if ( !noName ) {
-			bind( name, typeClass, prms, metadata );
+			bind( name, typeClass, parameterMaps, metadata );
 		}
 		if ( !noDefaultForType ) {
-			bind( defaultForType, typeClass, prms, metadata );
+			bind( defaultForType, typeClass, parameterMaps, metadata );
 		}
 	}
 

hibernate-core/src/main/java/org/hibernate/metamodel/source/annotations/util/JandexHelper.java

@@ -26,6 +26,7 @@ package org.hibernate.metamodel.source.annotations.util;
 import java.beans.Introspector;
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.Array;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -40,6 +41,7 @@ import org.jboss.jandex.FieldInfo;
 import org.jboss.jandex.Index;
 import org.jboss.jandex.Indexer;
 import org.jboss.jandex.MethodInfo;
+import org.jboss.jandex.Type;
 
 import org.hibernate.AnnotationException;
 import org.hibernate.AssertionFailure;
@@ -52,27 +54,89 @@ import org.hibernate.service.classloading.spi.ClassLoaderService;
  * @author Hardy Ferentschik
  */
 public class JandexHelper {
-	private static final AnnotationInstance[] EMPTY_ANNOTATIONS_ARRAY = new AnnotationInstance[0];
 	private static final Map<String, Object> DEFAULT_VALUES_BY_ELEMENT = new HashMap<String, Object>();
 
-	private static Object getDefaultValue(AnnotationInstance annotation, String element) {
+	/**
-		String name = annotation.name().toString();
+	 * Retrieves a jandex annotation element value. If the value is {@code null}, the default value specified in the
-		String fqElement = name + '.' + element;
+	 * annotation class is retrieved instead.
-		Object val = DEFAULT_VALUES_BY_ELEMENT.get( fqElement );
+	 * <p>
-		if ( val != null ) {
+	 * There are two special cases. {@code Class} parameters should be retrieved as strings (and then can later be
-			return val;
+	 * loaded) and enumerated values should be retrieved via {@link #getValueAsEnum(AnnotationInstance, String, Class)}.
+	 * </p>
+	 *
+	 * @param annotation the annotation containing the element with the supplied name
+	 * @param element the name of the element value to be retrieve
+	 * @param type the type of element to retrieve. The following types are supported:
+	 * <ul>
+	 * <li>Byte</li>
+	 * <li>Short</li>
+	 * <li>Integer</li>
+	 * <li>Character</li>
+	 * <li>Float</li>
+	 * <li>Double</li>
+	 * <li>Long</li>
+	 * <li>Boolean</li>
+	 * <li>String</li>
+	 * <li>AnnotationInstance</li>
+	 *
+	 * @return the value if not {@code null}, else the default value if not
+	 *         {@code null}, else {@code null}.
+	 *
+	 * @throws AssertionFailure in case the specified {@code type} is a class instance or the specified type causes a {@code ClassCastException}
+	 * when retrieving the value.
+	 */
+	@SuppressWarnings("unchecked")
+	public static <T> T getValue(AnnotationInstance annotation, String element, Class<T> type) throws AssertionFailure {
+		if ( Class.class.equals( type ) ) {
+			throw new AssertionFailure(
+					"Annotation parameters of type Class should be retrieved as strings (fully qualified class names)"
+			);
 		}
+
+		// try getting the untyped value from Jandex
+		AnnotationValue annotationValue = annotation.value( element );
+
 		try {
-			val = Index.class.getClassLoader().loadClass( name ).getMethod( element ).getDefaultValue();
+			if ( annotationValue != null ) {
-			DEFAULT_VALUES_BY_ELEMENT.put( fqElement, val );
+				return explicitAnnotationParameter( annotationValue, type );
-			return val == null ? null : val;
 			}
-		catch ( RuntimeException error ) {
+			else {
-			throw error;
+				return defaultAnnotationParameter( getDefaultValue( annotation, element ), type );
 			}
-		catch ( Exception error ) {
-			throw new AnnotationException( error );
 		}
+		catch ( ClassCastException e ) {
+			throw new AssertionFailure(
+					String.format(
+							"the annotation property %s of annotation %s is not of type %s",
+							element,
+							annotation.name(),
+							type.getName()
+					)
+			);
+		}
+	}
+
+	/**
+	 * Retrieves a jandex annotation element value, converting it to the supplied enumerated type.  If the value is
+	 * <code>null</code>, the default value specified in the annotation class is retrieved instead.
+	 *
+	 * @param <T> an enumerated type
+	 * @param annotation the annotation containing the enumerated element with the supplied name
+	 * @param element the name of the enumerated element value to be retrieve
+	 * @param type the type to which to convert the value before being returned
+	 *
+	 * @return the value converted to the supplied enumerated type if the value is not <code>null</code>, else the default value if
+	 *         not <code>null</code>, else <code>null</code>.
+	 *
+	 * @see #getValue(AnnotationInstance, String, Class)
+	 */
+	@SuppressWarnings("unchecked")
+	public static <T extends Enum<T>> T getValueAsEnum(AnnotationInstance annotation, String element, Class<T> type) {
+		AnnotationValue val = annotation.value( element );
+		if ( val == null ) {
+			return (T) getDefaultValue( annotation, element );
+		}
+		return Enum.valueOf( type, val.asEnum() );
 	}
 
 	/**
@@ -149,98 +213,6 @@ public class JandexHelper {
 		}
 	}
 
-	/**
-	 * Retrieves a jandex annotation element value.  If the value is <code>null</code>, the default value specified in the
-	 * annotation class is retrieved instead.  Note, {@link #getValueAsEnum(AnnotationInstance, String, Class)} must be
-	 * called to retrieve an enumerated value, and {@link #getValueAsArray(AnnotationInstance, String)} must be called to retrieve
-	 * an object array (other than a String array).
-	 *
-	 * @param annotation the annotation containing the element with the supplied name
-	 * @param element the name of the element value to be retrieve
-	 *
-	 * @return the value if not <code>null</code>, else the default value if not
-	 *         <code>null</code>, else <code>null</code>.
-	 */
-	public static Object getValue(AnnotationInstance annotation, String element) {
-		AnnotationValue val = annotation.value( element );
-		if ( val == null ) {
-			return getDefaultValue( annotation, element );
-		}
-		return val.asNested();
-	}
-
-	/**
-	 * Retrieves a jandex annotation element array.  Note, {@link #getValue(AnnotationInstance, String)} may be
-	 * called to retrieve a String array (or a non-array value).
-	 *
-	 * @param annotation the jandex annotation containing the element with the supplied name
-	 * @param element the name of the element array
-	 *
-	 * @return the element array if not <code>null</code>, else an empty array
-	 */
-	public static AnnotationInstance[] getValueAsArray(AnnotationInstance annotation, String element) {
-		AnnotationValue val = annotation.value( element );
-		return val == null ? EMPTY_ANNOTATIONS_ARRAY : val.asNestedArray();
-	}
-
-	/**
-	 * Retrieves a jandex annotation element value, converting it to the supplied enumerated type.  If the value is
-	 * <code>null</code>, the default value specified in the annotation class is retrieved instead.
-	 *
-	 * @param <T> an enumerated type
-	 * @param annotation the annotation containing the enumerated element with the supplied name
-	 * @param element the name of the enumerated element value to be retrieve
-	 * @param type the type to which to convert the value before being returned
-	 *
-	 * @return the value converted to the supplied enumerated type if the value is not <code>null</code>, else the default value if
-	 *         not <code>null</code>, else <code>null</code>.
-	 *
-	 * @see #getValue(AnnotationInstance, String)
-	 */
-	public static <T extends Enum<T>> T getValueAsEnum(AnnotationInstance annotation, String element, Class<T> type) {
-		AnnotationValue val = annotation.value( element );
-		if ( val == null ) {
-			return (T) getDefaultValue( annotation, element );
-		}
-		return Enum.valueOf( type, val.asEnum() );
-	}
-
-	/**
-	 * Retrieves a jandex annotation element value as an Integer.  If the value is <code>null</code>, the default value specified in
-	 * the annotation class is retrieved instead.
-	 *
-	 * @param annotation the annotation containing the element with the supplied name
-	 * @param element the name of the element value to be retrieve
-	 *
-	 * @return the value converted to an int if the value is not <code>null</code>, else the default value if not
-	 *         <code>null</code>, else <code>0</code>.
-	 */
-	public static int getValueAsInt(AnnotationInstance annotation, String element) {
-		AnnotationValue val = annotation.value( element );
-		if ( val == null ) {
-			return (Integer) getDefaultValue( annotation, element );
-		}
-		return val.asInt();
-	}
-
-	/**
-	 * Retrieves a jandex annotation element value as a String.  If the value is <code>null</code>, the default value specified in
-	 * the annotation class is retrieved instead.
-	 *
-	 * @param annotation the annotation containing the element with the supplied name
-	 * @param element the name of the element value to be retrieve
-	 *
-	 * @return the value converted to a String if the value is not <code>null</code>, else the default value if not
-	 *         <code>null</code>, else <code>null</code>.
-	 */
-	public static String getValueAsString(AnnotationInstance annotation, String element) {
-		AnnotationValue val = annotation.value( element );
-		if ( val == null ) {
-			return (String) getDefaultValue( annotation, element );
-		}
-		return val.asString();
-	}
-
 	/**
 	 * Creates a jandex index for the specified classes
 	 *
@@ -334,4 +306,59 @@ public class JandexHelper {
 
 	private JandexHelper() {
 	}
+
+	private static Object getDefaultValue(AnnotationInstance annotation, String element) {
+		String name = annotation.name().toString();
+		String fqElement = name + '.' + element;
+		Object val = DEFAULT_VALUES_BY_ELEMENT.get( fqElement );
+		if ( val != null ) {
+			return val;
+		}
+		try {
+			val = Index.class.getClassLoader().loadClass( name ).getMethod( element ).getDefaultValue();
+			DEFAULT_VALUES_BY_ELEMENT.put( fqElement, val );
+			return val == null ? null : val;
+		}
+		catch ( RuntimeException error ) {
+			throw error;
+		}
+		catch ( Exception error ) {
+			throw new AnnotationException( error );
+		}
+	}
+
+	private static <T> T defaultAnnotationParameter(Object defaultValue, Class<T> type) {
+		Object returnValue = defaultValue;
+
+		// resolve some mismatches between what's stored in jandex and what the defaults are for annotations
+		// in case of nested annotation arrays, jandex returns arrays of AnnotationInstances, hence we return
+		// an empty array of this type here
+		if ( defaultValue.getClass().isArray() && defaultValue.getClass().getComponentType().isAnnotation() ) {
+			returnValue = new AnnotationInstance[0];
+		}
+		return type.cast( returnValue );
+	}
+
+	private static <T> T explicitAnnotationParameter(AnnotationValue annotationValue, Class<T> type) {
+		Object returnValue = annotationValue.value();
+
+		// if the jandex return type is Type we actually try to retrieve a class parameter
+		// for our purposes we just return the fqcn of the class
+		if ( returnValue instanceof Type ) {
+			returnValue = ( (Type) returnValue ).name().toString();
+		}
+
+		// arrays we have to handle explicitly
+		if ( type.isArray() ) {
+			AnnotationValue[] values = (AnnotationValue[]) returnValue;
+			Class<?> componentType = type.getComponentType();
+			Object[] arr = (Object[]) Array.newInstance( componentType, values.length );
+			for ( int i = 0; i < values.length; i++ ) {
+				arr[i] = componentType.cast( values[i].value() );
+			}
+			returnValue = arr;
+		}
+
+		return type.cast( returnValue );
+	}
 }

hibernate-core/src/test/java/org/hibernate/metamodel/source/annotations/util/JandexHelperTest.java

@@ -23,26 +23,26 @@
  */
 package org.hibernate.metamodel.source.annotations.util;
 
-import static org.hamcrest.core.Is.is;
-
-import static org.junit.Assert.assertThat;
-
 import java.util.List;
 import java.util.Map;
+import javax.persistence.AttributeOverride;
 import javax.persistence.Basic;
 import javax.persistence.Column;
 import javax.persistence.LockModeType;
 import javax.persistence.NamedQuery;
-import javax.persistence.SequenceGenerator;
 
 import org.jboss.jandex.AnnotationInstance;
 import org.jboss.jandex.ClassInfo;
 import org.jboss.jandex.DotName;
 import org.jboss.jandex.Index;
 import org.junit.After;
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
+import org.hibernate.AssertionFailure;
+import org.hibernate.annotations.NamedNativeQuery;
+import org.hibernate.metamodel.source.annotations.HibernateDotNames;
 import org.hibernate.metamodel.source.annotations.JPADotNames;
 import org.hibernate.service.ServiceRegistryBuilder;
 import org.hibernate.service.classloading.spi.ClassLoaderService;
@@ -50,8 +50,12 @@ import org.hibernate.service.internal.BasicServiceRegistryImpl;
 import org.hibernate.testing.junit4.BaseUnitTestCase;
 
 import static junit.framework.Assert.assertTrue;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 
 /**
+ * Tests for the helper class {@link JandexHelper}.
+ *
  * @author Hardy Ferentschik
  */
 public class JandexHelperTest extends BaseUnitTestCase {
@@ -75,7 +79,6 @@ public class JandexHelperTest extends BaseUnitTestCase {
 			@Column
 			@Basic
 			private String bar;
-
 			private String fubar;
 		}
 		Index index = JandexHelper.indexForClass( classLoaderService, Foo.class );
@@ -98,46 +101,121 @@ public class JandexHelperTest extends BaseUnitTestCase {
 	}
 
 	@Test
-	public void shouldRetrieveDefaultOfUnspecifiedAnnotationElement() {
+	public void testGettingNestedAnnotation() {
-
+		@AttributeOverride(name = "foo", column = @Column(name = "FOO"))
-		@NamedQuery(name="foo", query="bar")
-		@SequenceGenerator(name="fu")
 		class Foo {
 		}
 
 		Index index = JandexHelper.indexForClass( classLoaderService, Foo.class );
-        for (AnnotationInstance query : index.getAnnotations( JPADotNames.NAMED_QUERY)) {
+		List<AnnotationInstance> annotationInstances = index.getAnnotations( JPADotNames.ATTRIBUTE_OVERRIDE );
-    		assertThat(JandexHelper.getValueAsEnum(query, "lockMode", LockModeType.class), is(LockModeType.NONE));
+		assertTrue( annotationInstances.size() == 1 );
-        }
+		AnnotationInstance annotationInstance = annotationInstances.get( 0 );
-        for (AnnotationInstance generator : index.getAnnotations( JPADotNames.SEQUENCE_GENERATOR)) {
+
-            assertThat(JandexHelper.getValueAsInt(generator, "allocationSize"), is(50));
+		// try to retrieve the name
-        }
+		String name = JandexHelper.getValue( annotationInstance, "name", String.class );
+		assertEquals( "Wrong nested annotation", "foo", name );
+
+		// try to retrieve the nested column annotation instance
+		AnnotationInstance columnAnnotationInstance = JandexHelper.getValue(
+				annotationInstance,
+				"column",
+				AnnotationInstance.class
+		);
+		assertNotNull( columnAnnotationInstance );
+		assertEquals(
+				"Wrong nested annotation",
+				"javax.persistence.Column",
+				columnAnnotationInstance.name().toString()
+		);
 	}
 
-    @Test
+	@Test(expected = AssertionFailure.class)
-    public void shouldRetrieveValueOfAnnotationElement() {
+	public void testTryingToRetrieveWrongType() {
-
+		@AttributeOverride(name = "foo", column = @Column(name = "FOO"))
-        @NamedQuery(name="foo", query="bar")
 		class Foo {
 		}
 
 		Index index = JandexHelper.indexForClass( classLoaderService, Foo.class );
-        for (AnnotationInstance query : index.getAnnotations( JPADotNames.NAMED_QUERY)) {
+		List<AnnotationInstance> annotationInstances = index.getAnnotations( JPADotNames.ATTRIBUTE_OVERRIDE );
-            assertThat(JandexHelper.getValueAsString(query, "name"), is("foo"));
+		assertTrue( annotationInstances.size() == 1 );
-        }
+		AnnotationInstance annotationInstance = annotationInstances.get( 0 );
+
+		JandexHelper.getValue( annotationInstance, "name", Float.class );
 	}
 
 	@Test
-    public void shouldRetrieveValueOfEnumeratedAnnotationElement() {
+	public void testRetrieveDefaultEnumElement() {
+		@NamedQuery(name = "foo", query = "fubar")
+		class Foo {
+		}
 
+		Index index = JandexHelper.indexForClass( classLoaderService, Foo.class );
+		List<AnnotationInstance> annotationInstances = index.getAnnotations( JPADotNames.NAMED_QUERY );
+		assertTrue( annotationInstances.size() == 1 );
+		AnnotationInstance annotationInstance = annotationInstances.get( 0 );
+
+		LockModeType lockMode = JandexHelper.getValueAsEnum( annotationInstance, "lockMode", LockModeType.class );
+		assertEquals( "Wrong lock mode", LockModeType.NONE, lockMode );
+	}
+
+	@Test
+	public void testRetrieveExplicitEnumElement() {
 		@NamedQuery(name = "foo", query = "bar", lockMode = LockModeType.OPTIMISTIC)
 		class Foo {
 		}
 
 		Index index = JandexHelper.indexForClass( classLoaderService, Foo.class );
-        for (AnnotationInstance query : index.getAnnotations( JPADotNames.NAMED_QUERY)) {
+		List<AnnotationInstance> annotationInstances = index.getAnnotations( JPADotNames.NAMED_QUERY );
-            assertThat(JandexHelper.getValueAsEnum(query, "lockMode", LockModeType.class), is(LockModeType.OPTIMISTIC));
+		assertTrue( annotationInstances.size() == 1 );
+		AnnotationInstance annotationInstance = annotationInstances.get( 0 );
+
+		LockModeType lockMode = JandexHelper.getValueAsEnum( annotationInstance, "lockMode", LockModeType.class );
+		assertEquals( "Wrong lock mode", LockModeType.OPTIMISTIC, lockMode );
 	}
+
+	@Test
+	public void testRetrieveStringArray() {
+		class Foo {
+			@org.hibernate.annotations.Index(name = "index", columnNames = { "a", "b", "c" })
+			private String foo;
+		}
+
+		Index index = JandexHelper.indexForClass( classLoaderService, Foo.class );
+		List<AnnotationInstance> annotationInstances = index.getAnnotations( HibernateDotNames.INDEX );
+		assertTrue( annotationInstances.size() == 1 );
+		AnnotationInstance annotationInstance = annotationInstances.get( 0 );
+
+		String[] columnNames = JandexHelper.getValue( annotationInstance, "columnNames", String[].class );
+		Assert.assertTrue( columnNames.length == 3 );
+	}
+
+	@Test(expected = AssertionFailure.class)
+	public void testRetrieveClassParameterAsClass() {
+		@NamedNativeQuery(name = "foo", query = "bar", resultClass = Foo.class)
+		class Foo {
+		}
+
+		Index index = JandexHelper.indexForClass( classLoaderService, Foo.class );
+		List<AnnotationInstance> annotationInstances = index.getAnnotations( HibernateDotNames.NAMED_NATIVE_QUERY );
+		assertTrue( annotationInstances.size() == 1 );
+		AnnotationInstance annotationInstance = annotationInstances.get( 0 );
+
+		JandexHelper.getValue( annotationInstance, "resultClass", Class.class );
+	}
+
+	@Test
+	public void testRetrieveClassParameterAsString() {
+		@NamedNativeQuery(name = "foo", query = "bar", resultClass = Foo.class)
+		class Foo {
+		}
+
+		Index index = JandexHelper.indexForClass( classLoaderService, Foo.class );
+		List<AnnotationInstance> annotationInstances = index.getAnnotations( HibernateDotNames.NAMED_NATIVE_QUERY );
+		assertTrue( annotationInstances.size() == 1 );
+		AnnotationInstance annotationInstance = annotationInstances.get( 0 );
+
+		String fqcn = JandexHelper.getValue( annotationInstance, "resultClass", String.class );
+		assertEquals( "Wrong class names", Foo.class.getName(), fqcn );
 	}
 }