EntityDataIterable iterable = config.getDataInterable();
assertNotNull(iterable);
assertEquals(iterable.getClass(), RdfIndexingSource.class);
assertTrue(iterable.needsInitialisation());
iterable.initialise();
EntityDataIterator it = iterable.entityDataIterator();
long count = 0;
while(it.hasNext()){
String entity = it.next();
log.info("validate Entity "+entity);
assertNotNull(entity);