szaszm commented on a change in pull request #1281: URL: https://github.com/apache/nifi-minifi-cpp/pull/1281#discussion_r831070760
########## File path: libminifi/include/properties/ConfigurationReader.h ########## @@ -0,0 +1,32 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#pragma once + +#include <optional> +#include <string> + +namespace org::apache::nifi::minifi { + +class ConfigurationReader { + public: + virtual bool get(const std::string& key, std::string& value) const = 0; + virtual bool get(const std::string& key, const std::string& alternate_key, std::string& value) const = 0; + virtual std::optional<std::string> get(const std::string& key) const = 0; +}; Review comment: I think `std::optional<std::string> get(std::string_view key)` would cover all use cases. Alternate keys could be handled with `utils::orElse`. Consider removing this interface and replacing it with a `std::function<std::optional<std::string>(std::string_view)>` or templates with a similar callback signature, in the name of simplicity. If you decide to keep it like this, please add a virtual destructor. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
