fetchGroupNameMapping.setAttributeName("name");
fetchGroupNameMapping.setXPath(getPrimaryNamespaceXPath() + "name");
descriptor.addMapping(fetchGroupNameMapping);
XMLCompositeDirectCollectionMapping fetchGroupAttributeMapping = new XMLCompositeDirectCollectionMapping();
CollectionContainerPolicy containerPolicy = new CollectionContainerPolicy(TreeSet.class);
fetchGroupAttributeMapping.setContainerPolicy(containerPolicy);
fetchGroupAttributeMapping.setAttributeName("attributes");
fetchGroupAttributeMapping.setXPath(getPrimaryNamespaceXPath() + "fetch-group-attributes/" + getPrimaryNamespaceXPath() + "fetch-group-attribute/text()");
descriptor.addMapping(fetchGroupAttributeMapping);