text: /**
   * 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.
   */
  #ifndef LIBHDFSPP_CONFIGPARSER_H_
  #define LIBHDFSPP_CONFIGPARSER_H_
  
  #include "hdfspp/options.h"
  #include "hdfspp/uri.h"
  #include "hdfspp/status.h"
  
  #include <string>
  #include <memory>
  #include <vector>
  
  namespace hdfs {
  
  class ConfigParser {
   public:
    ConfigParser();
    ConfigParser(const std::string& path);
    ConfigParser(const std::vector<std::string>& configDirectories);
    ~ConfigParser();
    ConfigParser(ConfigParser&&);
    ConfigParser& operator=(ConfigParser&&);
  
    bool LoadDefaultResources();
    std::vector<std::pair<std::string, Status> > ValidateResources() const;
  
    // Return false if value couldn't be found or cast to desired type
    bool get_int(const std::string& key, int& outval) const;
    int get_int_or(const std::string& key, const int defaultval) const;
  
    bool get_string(const std::string& key, std::string& outval) const;
    std::string get_string_or(const std::string& key, const std::string& defaultval) const;
  
    bool get_bool(const std::string& key, bool& outval) const;
    bool get_bool_or(const std::string& key, const bool defaultval) const;
  
    bool get_double(const std::string& key, double& outval) const;
    double get_double_or(const std::string& key, const double defaultval) const;
  
    bool get_uri(const std::string& key, URI& outval) const;
    URI get_uri_or(const std::string& key, const URI& defaultval) const;
  
    bool get_options(Options& outval) const;
    Options get_options_or(const Options& defaultval) const;
  
   private:
    class impl;
    std::unique_ptr<impl> pImpl;
  };
  
  }
  #endif
  