text: // --------------------------------------------------------------------------
  //                   OpenMS -- Open-Source Mass Spectrometry
  // --------------------------------------------------------------------------
  // Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
  // ETH Zurich, and Freie Universitaet Berlin 2002-2020.
  //
  // This software is released under a three-clause BSD license:
  //  * Redistributions of source code must retain the above copyright
  //    notice, this list of conditions and the following disclaimer.
  //  * Redistributions in binary form must reproduce the above copyright
  //    notice, this list of conditions and the following disclaimer in the
  //    documentation and/or other materials provided with the distribution.
  //  * Neither the name of any author or any participating institution
  //    may be used to endorse or promote products derived from this software
  //    without specific prior written permission.
  // For a full list of authors, refer to the file AUTHORS.
  // --------------------------------------------------------------------------
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  // ARE DISCLAIMED. IN NO EVENT SHALL ANY OF THE AUTHORS OR THE CONTRIBUTING
  // INSTITUTIONS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  //
  // --------------------------------------------------------------------------
  // $Maintainer: Timo Sachsenberg $
  // $Authors: Anton Pervukhin <Anton.Pervukhin@CeBiTec.Uni-Bielefeld.DE> $
  // --------------------------------------------------------------------------
  //
  
  #pragma once
  
  #include <fstream>
  #include <istream>
  #include <map>
  #include <string>
  
  #include <OpenMS/CONCEPT/Exception.h>
  
  namespace OpenMS
  {
  
    namespace ims
    {
  
      /**
        @brief An abstract templatized parser to load the data that is used to initialize @c Alphabet objects.
  
        @c AlphabetParser reads the input source, which is given as a template parameter @c InputSource , by
        @c load (const std::string& fname) function where @c fname is the source name.
        Loaded data can be retrieved by calling @c getElements().
  
        @see Alphabet
      */
      template <typename AlphabetElementType = double,
                typename Container = std::map<std::string, AlphabetElementType>,
                typename InputSource = std::istream>
      class IMSAlphabetParser
      {
  public:
        /**
          Type of data to be loaded.
         */
        typedef Container ContainerType;
  
        /**
          Loads the data from the InputSource with the name @c fname.
          If there is an error occurred while reading data from InputSource,
          @c IOException is thrown.
  
          @param fname The name of the input source.
         */
        void load(const std::string & fname);
  
        /**
          Gets the data that was loaded.
  
          @return The data.
         */
        virtual ContainerType & getElements() = 0;
  
        /**
          Parses the the given input source @c is .
  
          @param is The InputSource
         */
        virtual void parse(InputSource & is) = 0;
  
        /// Destructor
        virtual ~IMSAlphabetParser() {}
      };
  
      template <typename AlphabetElementType, typename Container, typename InputSource>
      void IMSAlphabetParser<AlphabetElementType, Container, InputSource>::load(const std::string & fname)
      {
        std::ifstream ifs(fname.c_str());
        if (!ifs)
        {
          throw Exception::IOException(__FILE__, __LINE__, OPENMS_PRETTY_FUNCTION, fname);
        }
        this->parse(ifs);
      }
  
    } // namespace ims
  } // namespace OpenMS
  
  