import javax.persistence.NamedSubgraph; //导入依赖的package包/类
private static void bindNamedSubgraph(XMLContext.Default defaults, AnnotationDescriptor ann, List<Element> subgraphNodes) {
	List<NamedSubgraph> annSubgraphNodes = new ArrayList<NamedSubgraph>(  );
	for(Element subgraphNode : subgraphNodes){
		AnnotationDescriptor annSubgraphNode = new AnnotationDescriptor( NamedSubgraph.class );
		copyStringAttribute( annSubgraphNode, subgraphNode, "name", true );
		String clazzName = subgraphNode.attributeValue( "class" );
		Class clazz;
		try {
			clazz = ReflectHelper.classForName(
					XMLContext.buildSafeClassName( clazzName, defaults ),
					JPAOverriddenAnnotationReader.class
			);
		}
		catch ( ClassNotFoundException e ) {
			throw new AnnotationException( "Unable to find entity-class: " + clazzName, e );
		}
		annSubgraphNode.setValue( "type", clazz );
		bindNamedAttributeNodes(subgraphNode, annSubgraphNode);
		annSubgraphNodes.add( (NamedSubgraph) AnnotationFactory.create( annSubgraphNode ) );
	}
	ann.setValue( "subgraphs", annSubgraphNodes.toArray( new NamedSubgraph[annSubgraphNodes.size()] ) );
}