//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of the EvtGen package developed jointly
//      for the BaBar and CLEO collaborations.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Module: EvtBtoXsgammaKagan.cc
//
// Description:
//       Routine to perform two-body B->Xs,gamma decays with a fixed hadronic 
//       mass. For spectrum measurements.
//       The input parameters are 1: the hadronic mass

// Modification history:
//
//      Jim Libby October 11 2002
//------------------------------------------------------------------------
//

#include "EvtGenBase/EvtPatches.hh"
#include <stdlib.h>
#include "EvtGenModels/EvtBtoXsgamma.hh"
#include "EvtGenModels/EvtBtoXsgammaFixedMass.hh"
#include "EvtGenBase/EvtReport.hh"
#include <fstream>
using std::endl;
using std::fstream;

EvtBtoXsgammaFixedMass::~EvtBtoXsgammaFixedMass(){
}

void EvtBtoXsgammaFixedMass::init(int nArg, double* args){

  if ((nArg) > 2 || (nArg > 1 && nArg <2)){
  
  report(ERROR,"EvtGen") << "EvtBtoXsgamma generator model "
			 << "EvtBtoXsgammaFixedMass expected " 
			 << "either 1(default config) or two arguments but found: "<<nArg<<endl;
  report(ERROR,"EvtGen") << "Will terminate execution!"<<endl;
    ::abort();  
  }
  
  if(nArg == 1){
    _mH = 2.0;
  }else{
    _mH=args[1];
  }
}

double EvtBtoXsgammaFixedMass::GetMass( int /*Xscode*/ ){
  return _mH;
}