GETFileChecker.cxx

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// =================================================
//  GETFileChecker Class
//
//  Description:
//    Check if the file exists or not
//
//  Genie Jhang ( geniejhang@majimak.com )
//  2015. 09. 01
// =================================================
 
// GETDecoder
#include "GETFileChecker.h"
 
// ROOT
#include <TObjArray.h>
#include <TObjString.h>
#include <TString.h>
#include <TSystem.h>
// STL
#include <iostream>
 
TString GETFileChecker::CheckFile(TString filename)
{
   if (filename(0, 1) == "~")
      filename.Replace(0, 1, gSystem->HomeDirectory());
 
   TString nextData = filename;
 
   TObjArray *pathElements = nullptr;
   pathElements = nextData.Tokenize("/");
 
   Int_t numElements = pathElements->GetLast();
 
   TString path = "";
   if (numElements == 0)
      path = gSystem->pwd();
   else {
      if (filename(0, 1) == "/")
         path.Append("/");
 
      for (Int_t i = 0; i < numElements; i++) {
         path.Append(((TObjString *)pathElements->At(i))->GetString());
         path.Append("/");
      }
   }
 
   TString tempDataFile = ((TObjString *)pathElements->Last())->GetString();
   delete pathElements;
 
   nextData = gSystem->Which(path, tempDataFile);
   if (!nextData.EqualTo("")) {
      std::cout << "== [GETFileChecker] File exist: " << filename << std::endl;
 
      return nextData.Data();
   } else {
      std::cout << "== [GETFileChecker] File does not exist: " << filename << std::endl;
 
      return "";
   }
 
   return "";
}