if (entityInfo == null) {
Map<String, Property<Object>> properties = PropertyQueries.createQuery(entityClass).getWritableResultList();
MongoCollection classAnnotation = entityClass.getAnnotation(MongoCollection.class);
String dbCollectionName = classAnnotation==null ? null : classAnnotation.collectionName();
entityInfo = new EntityInfo(entityClass, dbCollectionName, properties);
EntityInfo existing = entityInfoCache.putIfAbsent(entityClass, entityInfo);
if (existing != null) {
entityInfo = existing;