BelosStatusTestMaxIters.hpp

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//                 Belos: Block Linear Solvers Package
//                 Copyright (2004) Sandia Corporation
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#ifndef BELOS_STATUS_TEST_MAXITERS_HPP
#define BELOS_STATUS_TEST_MAXITERS_HPP

#include "BelosStatusTest.hpp"

namespace Belos {

template <class ScalarType, class MV, class OP>
class StatusTestMaxIters: public StatusTest<ScalarType,MV,OP> {

 public:



  StatusTestMaxIters(int maxIters);

  virtual ~StatusTestMaxIters() {};




  StatusType CheckStatus(IterativeSolver<ScalarType,MV,OP> *iSolver );

  StatusType GetStatus() const {return(status_);};




  void Reset();




  int GetMaxIters() const { return(maxIters_); };

  int GetNumIters() const { return(nIters_); };




  bool ResidualVectorRequired() const { return(false); } ;



  ostream& Print(ostream& os, int indent = 0) const;

  

private:



  int maxIters_;

  int nIters_;

  StatusType status_;

};

  template <class ScalarType, class MV, class OP> 
  StatusTestMaxIters<ScalarType,MV,OP>::StatusTestMaxIters(int maxIters)
  {
    if (maxIters < 1)
      maxIters_ = 1;
    else
      maxIters_ = maxIters;
    
    nIters_ = 0;
    status_ = Unchecked;
  }
  
  template <class ScalarType, class MV, class OP>
  StatusType StatusTestMaxIters<ScalarType,MV,OP>::CheckStatus(IterativeSolver<ScalarType,MV,OP> *iSolver )
  {
    status_ = Unconverged;
    nIters_ = iSolver->GetNumIters();
    if (nIters_ >= maxIters_)
      status_ = Failed;
    return status_;
  }
  
  template <class ScalarType, class MV, class OP>
  void StatusTestMaxIters<ScalarType,MV,OP>::Reset()
  {
    nIters_ = 0;
    status_ = Unchecked;
  }    
    
  template <class ScalarType, class MV, class OP>
  ostream& StatusTestMaxIters<ScalarType,MV,OP>::Print(ostream& os, int indent) const
  {
    for (int j = 0; j < indent; j ++)
      os << ' ';
    this->PrintStatus(os, status_);
    os << "Number of Iterations = ";
    os << nIters_;
    os << ((nIters_ < maxIters_) ? " < " : ((nIters_ == maxIters_) ? " == " : " > "));
    os << maxIters_;
    os << endl;
    return os;
  }
  
} // end Belos namespace

#endif /* BELOS_STATUS_TEST_MAXITERS_HPP */

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