class MongoQueryTranslator extends
        AbstractQueryTranslator<DBObject, DBObject, DBObject> implements
        QueryTranslator<DBObject, DBObject, DBObject> {

    @Override
    public DBObject notNull(String fieldName) {
        return and(exists(fieldName, true), ne(fieldName, null));
    }

    public  MongoQueryTranslator(PropertyResolver propertyResolver);

}