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#ifndef ROL_BATCHMANAGER_HPP
#define ROL_BATCHMANAGER_HPP

#include "Teuchos_RefCountPtr.hpp"
#include "ROL_Vector.hpp"
#include "ROL_Elementwise_Function.hpp"

namespace ROL {

template<class Real> 
class BatchManager {
public:
  virtual ~BatchManager() {}

  virtual int batchID(void) {
    return 0;
  }

  virtual int numBatches(void) {
    return 1;
  }

  virtual void sumAll(Real* input, Real* output, int dim) {
    for (int i=0; i<dim; i++) {
      output[i] = input[i];
    }
  }

  virtual void sumAll(Vector<Real> &input, Vector<Real> &output) {
    output.set(input);
  }

  virtual void reduceAll(Real *input, Real* output,
                         const Elementwise::ReductionOp<Real> &r) {
    output[0] = input[0];
  }

  virtual void barrier(void) {}
};

}

#endif
