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#ifndef ROL_STATUSTEST_H
#define ROL_STATUSTEST_H

#include "ROL_Types.hpp"

/** \class ROL::StatusTest
    \brief Provides an interface to check status of optimization algorithms.
*/


namespace ROL {


template <class Real>
class StatusTest {
private:

  Real gtol_;
  Real stol_;
  int  max_iter_;

public:

  virtual ~StatusTest() {}

  StatusTest( Teuchos::ParameterList &parlist ) {
    gtol_     = parlist.sublist("Status Test").get("Gradient Tolerance", 1.e-6);
    stol_     = parlist.sublist("Status Test").get("Step Tolerance", 1.e-6*gtol_);
    max_iter_ = parlist.sublist("Status Test").get("Iteration Limit", 100);
  }

  StatusTest( Real gtol = 1.e-6, Real stol = 1.e-12, int max_iter = 100 ) :  
    gtol_(gtol), stol_(stol), max_iter_(max_iter) {}

  /** \brief Check algorithm status.
  */
  virtual bool check( AlgorithmState<Real> &state ) {
     if ( (state.gnorm > gtol_) && 
          (state.snorm > stol_) && 
          (state.iter  < max_iter_) ) {
       return true;
     }
     else {
       return false;
     }
  }

}; // class StatusTest

} // namespace ROL

#endif
