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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkRegularExpressionSeriesFileNames.cxx,v $
Language: C++
Date: $Date: 2007-03-29 18:39:28 $
Version: $Revision: 1.7 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef _itkRegularExpressionSeriesFileNames_cxx
#define _itkRegularExpressionSeriesFileNames_cxx
#ifdef _MSC_VER
#pragma warning ( disable : 4786 )
#endif
#include <vector>
#include <string>
#include <algorithm>
#include <itksys/SystemTools.hxx>
#include <itksys/Directory.hxx>
#include <itksys/RegularExpression.hxx>
#include "itkRegularExpressionSeriesFileNames.h"
struct lt_pair_numeric_string_string
{
bool operator()(const std::pair<std::string, std::string> s1,
const std::pair<std::string, std::string> s2) const
{
return atof(s1.second.c_str()) < atof(s2.second.c_str());
}
};
struct lt_pair_alphabetic_string_string
{
bool operator()(const std::pair<std::string, std::string> s1,
const std::pair<std::string, std::string> s2) const
{
return s1.second < s2.second;
}
};
namespace itk
{
const std::vector<std::string> &
RegularExpressionSeriesFileNames
::GetFileNames()
{
// Validate the ivars
if ( m_Directory == "" )
{
itkExceptionMacro ( << "No directory defined!");
}
itksys::RegularExpression reg;
if (!reg.compile(m_RegularExpression.c_str()))
{
itkExceptionMacro(<< "Error compiling regular expression " << m_RegularExpression);
}
// Process all files in the directory
itksys::Directory fileDir;
if (!fileDir.Load (m_Directory.c_str()))
{
itkExceptionMacro ( << "Directory " << m_Directory.c_str() << " cannot be read!");
}
std::vector<std::pair<std::string,std::string> > sortedBySubMatch;
// Scan directory for files. Each file is checked to see if it
// matches the m_RegularExpression.
for (unsigned long i = 0; i < fileDir.GetNumberOfFiles(); i++)
{
// Only read files
if (itksys::SystemTools::FileIsDirectory( (m_Directory + "/" + fileDir.GetFile(i)).c_str() ))
{
continue;
}
if (reg.find(fileDir.GetFile(i)))
{
// Store the full filename and the selected sub expression match
std::pair<std::string,std::string> fileNameMatch;
fileNameMatch.first = m_Directory + "/" + fileDir.GetFile(i);
fileNameMatch.second = reg.match(m_SubMatch);
sortedBySubMatch.push_back(fileNameMatch);
}
}
// Sort the files. The files are sorted by the sub match defined by
// m_SubMatch. Sorting can be alpahbetic or numeric.
if (m_NumericSort)
{
std::sort(sortedBySubMatch.begin(),
sortedBySubMatch.end(),
lt_pair_numeric_string_string());
}
else
{
std::sort(sortedBySubMatch.begin(),
sortedBySubMatch.end(),
lt_pair_alphabetic_string_string());
}
// Now, store the sorted names in a vector
m_FileNames.clear();
std::vector<std::pair<std::string, std::string> >::iterator siter;
for (siter = sortedBySubMatch.begin();
siter != sortedBySubMatch.end();
siter++)
{
m_FileNames.push_back((*siter).first);
}
return m_FileNames;
}
void
RegularExpressionSeriesFileNames
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Directory: " << m_Directory << std::endl;
os << indent << "SubMatch: " << m_SubMatch << std::endl;
os << indent << "NumericSort: " << m_NumericSort << std::endl;
os << indent << "RegularExpression: " << m_RegularExpression << std::endl;
for (unsigned int i = 0; i < m_FileNames.size(); i++)
{
os << indent << "Filenames[" << i << "]: " << m_FileNames[i] << std::endl;
}
}
} //namespace ITK
#endif
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