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

    protected DBObject exists(String fieldName, boolean exists) {
        return object(fieldName, object(MongoOperator.EXISTS, exists ? 1 : 0));
    }

    public  MongoQueryTranslator(PropertyResolver propertyResolver);

}