itkCSVFileReaderBase.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed 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.txt
 *
 *  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 __itkCSVFileReaderBase_h
#define __itkCSVFileReaderBase_h

#include "itkLightProcessObject.h"
#include <vcl_limits.h>
#include "itkMacro.h"
#include "itkSize.h"
#include <fstream>

namespace itk
{
class ITK_EXPORT CSVFileReaderBase:public LightProcessObject
{
public:
  typedef CSVFileReaderBase         Self;
  typedef LightProcessObject        Superclass;

  itkTypeMacro(Self,Superclass);

  itkSetStringMacro(FileName);

  itkSetMacro(FieldDelimiterCharacter,char);

  itkGetMacro(FieldDelimiterCharacter, char);

  itkSetMacro(UseStringDelimiterCharacter,bool);

  itkGetConstMacro(UseStringDelimiterCharacter, bool);

  itkSetMacro(StringDelimiterCharacter,char);

  itkGetMacro(StringDelimiterCharacter, char);

  itkSetMacro(HasRowHeaders,bool);

  itkGetConstMacro(HasRowHeaders,bool);

  itkSetMacro(HasColumnHeaders,bool);

  itkGetConstMacro(HasColumnHeaders, bool);

  itkBooleanMacro(HasRowHeaders);
  itkBooleanMacro(HasColumnHeaders);
  itkBooleanMacro(UseStringDelimiterCharacter);

  void GetDataDimension(SizeValueType & rows, SizeValueType & columns);

  void GetNextField(std::string & );

  template <class TData>
  TData ConvertStringToValueType(const std::string str)
  {
    TData value;
    std::istringstream isstream(str);
    isstream >> value;

    size_t isstreamtellg = static_cast<size_t>(isstream.tellg() );

    if (!isstream.fail() || isstreamtellg == str.length() )
      {
      return value;
      }
    else
      {
      return vcl_numeric_limits<TData>::quiet_NaN();
      }
  }

  virtual void Parse()=0;

protected:
  std::string                  m_FileName;
  char                         m_FieldDelimiterCharacter;
  char                         m_StringDelimiterCharacter;
  bool                         m_UseStringDelimiterCharacter;
  bool                         m_HasRowHeaders;
  bool                         m_HasColumnHeaders;
  std::ifstream                m_InputStream;
  int                          m_EndOfColumnHeadersLine;
  std::string                  m_Line;

  CSVFileReaderBase();
  virtual ~CSVFileReaderBase() {}
  void PrintSelf(std::ostream & os, Indent indent) const;

  void PrepareForParsing();

private:
  CSVFileReaderBase(const Self &);       //purposely not implemented
  void operator=(const Self &);          //purposely not implemented
};

} //end namespace itk

#endif