//____________________________________________________________________
// 
// Serve BRAT path names to clients that may need to know those. 
// The class makes sure that consistent path names are used through
// out the code. 
// 
// Example of use:
// 
//    BrPathManager* pathMan = BrPathManager::Instance();
//    const Char_t*  paramsFile =
//      Form("%s/DetectorParameters.txt", 
//           pathMan->GetParameterDir());
//

// The manager allows the user to override the compile-time path
// settings via the environment. 
//
//    Environment       Method          Return 
//    variable                          Value
//  ------------------------------------------------
//    BRATSYS           GetDataDir      BRATSYS  
//
//
  
//____________________________________________________________________
//
// $Id: BrPathManager.cxx,v 1.3 2001/06/28 16:38:06 cholm Exp $
// $Author: cholm $
// $Date: 2001/06/28 16:38:06 $
// $Copyright: (C) 2001 BRAHMS Collaboration <brahmlib@rhic.bnl.gov>
//
#ifndef BRAT_BrPathManager
#include "BrPathManager.h"
#endif
#ifndef ROOT_TSystem
#include "TSystem.h"
#endif
#ifndef BRAT_paths
#include "paths.h"
#endif 
#ifndef BRAT_DATA_DIR
#error "BRAT_DATA_DIR must be defined at compile time!!!"
#endif

//____________________________________________________________________
ClassImp(BrPathManager);

//____________________________________________________________________
BrPathManager* BrPathManager::fgInstance = 0;

//____________________________________________________________________
 BrPathManager::BrPathManager()
{
  // Default constructor. Does nothing. 
}

//____________________________________________________________________
 BrPathManager* BrPathManager::Instance()
{
  if (!fgInstance) 
    fgInstance = new BrPathManager;
  return fgInstance;
}

//____________________________________________________________________
 const Char_t*  BrPathManager::GetDataDir() const 
{
  // Return the data directory.  

  // If environment variable BRATSYS is set then that takes precedence
  // over the compile time path.   
  return BRAT_DATA_DIR;
}
  
//____________________________________________________________________
 const Char_t*  BrPathManager::GetScriptDir() const 
{
  // Return the script directory.  

  // If environment variable BRATSYS is set then that takes precedence
  // over the compile time path.  
  return BRAT_SCRIPT_DIR;
}
  
//____________________________________________________________________
 const Char_t*  BrPathManager::GetParameterDir() const 
{
  // Return the temporary parameter directory.  

  // If environment variable BRATSYS is set then that takes precedence
  // over the compile time path.  
  return BRAT_PARAMS_DIR;
}

//____________________________________________________________________
 const Char_t*  BrPathManager::GetLibraryDir() const 
{
  // Return the library directory.  

  // If environment variable BRATSYS is set then that takes precedence
  // over the compile time path.  
  return BRAT_LIB_DIR;
}

//____________________________________________________________________
 const Char_t*  BrPathManager::GetHeaderDir() const 
{
  // Return the header directory.  

  // If environment variable BRATSYS is set then that takes precedence
  // over the compile time path.  
  return BRAT_INCLUDE_DIR;
}

//____________________________________________________________________
 const Char_t*  BrPathManager::GetProgramDir() const 
{
  // Return the program directory.  

  // If environment variable BRATSYS is set then that takes precedence
  // over the compile time path.  
  return BRAT_BIN_DIR;
}

//____________________________________________________________________
 const Char_t*  BrPathManager::GetSourceDir() const 
{
  // Return the program directory.  

  // If environment variable BRATSYS is set then that takes precedence
  // over the compile time path.  
  return BRAT_TOPSRC_DIR;
}

//____________________________________________________________________
//
// $Log: BrPathManager.cxx,v $
// Revision 1.3  2001/06/28 16:38:06  cholm
// Added methods to retrive various installation directories, like
// library, header, script, parameter, etc. directories.
//
// Revision 1.2  2001/06/21 19:42:56  hagel
// Made BrPathManager not mess up for brat2
//
// Revision 1.1.1.1  2001/06/21 14:55:15  hagel
// Initial revision of brat2
//
// Revision 1.2  2001/06/06 18:44:20  cholm
// Fixed a bug when TSystem::Getenv returning empty environment
//
// Revision 1.1  2001/06/04 13:34:21  cholm
// Warm-up for BRAT2.
// Added file tag class. Added version class. Added path manager.
//
//

Copyright ; 2002 BRAHMS Collaboration <brahmlib@rcf.rhic.bnl.gov>
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