IodaIOfactory.cc

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/*
 * (C) Copyright 2017 UCAR
 * 
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. 
 */
 
#include "ioda/io/IodaIOfactory.h"
 
#include <string>
 
#include "oops/util/abor1_cpp.h"
#include "oops/util/Logger.h"
 
#include "ioda/io/NetcdfIO.h"
 
namespace ioda {
 
//-------------------------------------------------------------------------------------
/*!
 * \brief Instantiate a IodaIO object
 *
 * \param[in] FileName Path to the obs file
 * \param[in] FileMode Mode in which to open the obs file, "r" for read, "w" for overwrite
 *            and existing file and "W" for create and write to a new file
 * \param[in] MaxFrameSize  Maximum number of "rows" in a frame
 */
 
IodaIO* IodaIOfactory::Create(const std::string & FileName, const std::string & FileMode,
                              const std::size_t MaxFrameSize) {
  std::size_t Spos;
  std::string FileSuffix;
 
  // Form the suffix by chopping off the string after the last "." in the file name.
  Spos = FileName.find_last_of(".");
  if (Spos == FileName.npos) {
    FileSuffix = "";
  } else {
    FileSuffix = FileName.substr(Spos+1);
  }
 
  // Create the appropriate object depending on the file suffix
  std::string FileSuffixList = ".nc4, .nc";
 
  if ((FileSuffix == "nc4") || (FileSuffix == "nc")) {
    return new ioda::NetcdfIO(FileName, FileMode, MaxFrameSize);
  } else {
    oops::Log::error() << "IodaIO::Create: Unrecognized file suffix: "
                       << FileName << std::endl;
    oops::Log::error() << "IodaIO::Create:   suffix must be one of: " << FileSuffixList
                       << std::endl;
    ABORT("IodaIO::Create: Unrecognized file suffix");
    return NULL;
  }
}
 
}  // namespace ioda