ROL_BlockOperator2.hpp

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// @HEADER
// *****************************************************************************
//               Rapid Optimization Library (ROL) Package
//
// Copyright 2014 NTESS and the ROL contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER
 
#ifndef ROL_BLOCKOPERATOR2_H
#define ROL_BLOCKOPERATOR2_H
 
#include "ROL_BlockOperator.hpp"

 
namespace ROL {
 
template<class Real>
class BlockOperator2 : public LinearOperator<Real> {
 
  typedef Vector<Real>               V;    // ROL Vector
  typedef PartitionedVector<Real>    PV;   // ROL PartitionedVector
  typedef LinearOperator<Real>       OP;   // Linear Operator
 
private:
 
  ROL::Ptr<OP> bkop_;
  ROL::Ptr<std::vector<ROL::Ptr<OP> > > ops_;
 
public:   
 
  BlockOperator2( ROL::Ptr<OP> &a11, ROL::Ptr<OP> &a12,
                  ROL::Ptr<OP> &a21, ROL::Ptr<OP> &a22 ) {
 
    using std::vector;
    
    
 
    ops_ = ROL::makePtr<vector<ROL::Ptr<OP> >>();
    ops_->push_back(a11);
    ops_->push_back(a12);
    ops_->push_back(a21);
    ops_->push_back(a22);
            
    bkop_ = ROL::makePtr<BlockOperator<Real>>(ops_);
 
  }
 
 
  void apply( V &Hv, const V &v, Real &tol ) const {
    bkop_->apply(Hv,v,tol);  
  }
 
 
  void applyInverse( V &Hv, const V &v, Real &tol ) const {
 
    ROL_TEST_FOR_EXCEPTION( true , std::logic_error, 
                                ">>> ERROR (ROL_BlockOperator2, applyInverse): "
                                "Not implemented."); 
 
  } 
 
  ROL::Ptr<LinearOperator<Real> > getOperator( int row, int col ) const {
    int dex = 2*row+col;
    if( 0<=dex && dex<=3 ) {
      return (*ops_)[dex];
    } 
    else {
      ROL_TEST_FOR_EXCEPTION( true, std::invalid_argument, 
                                  ">>> ERROR (ROL_BlockOperator2, getOperator): "
                                  "invalid block indices."); 
    }
    
  }
 
 
}; // class BlockOperator2
 
} // namespace ROL
 
#endif // ROL_BLOCKOPERATOR2_H