/*************************************************************************

Copyright Rice University, 2004.
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**************************************************************************/

#ifndef __HCL2RN
#define __HCL2RN

#include "functions.hh"
#include "rn.hh"
#include "localspace.hh"
#include "locallinalg.hh"

namespace RVL {

  /** A space whose elements are RnArrays and which uses the standard
      linear algebra package.  This is an implementation of the mathematical
      space \f$R^{n}\f$.
  */
  template<class Scalar>
  class RnSpace: public LocalSpace<Scalar> {
  private:

    int dim;
    RnDataContainerFactory<Scalar> * dcfac;
    RVLLinearAlgebraPackage<Scalar> lap;
    RVLLinearAlgebraPackage<Scalar> & lapref;

  protected:

    void redim(int newdim) { 
      try {
	dim = newdim;
	if (dcfac) delete dcfac;
	dcfac = new RnDataContainerFactory<Scalar>(dim);
      }
      catch (RVLException & e) {
	e<<"\ncalled from RnSpace::redim\n";
	throw e;
      }
    }

    Space<Scalar> * clone() const { return new RnSpace<Scalar>(*this); }
    
    LocalDataContainerFactory<Scalar> & getLDCF() const { return *dcfac; }
    LinearAlgebraPackage<Scalar> & getLAP() const { return lapref; }

  public:

    RnSpace(int n=0): dim(n), lap(), lapref(lap) {
      try {
	dcfac = new RnDataContainerFactory<Scalar>(dim);
      }
      catch (RVLException & e) {
	e<<"\ncalled from RnSpace constructor\n";
	throw e;
      }
    }
    RnSpace(const RnSpace<Scalar> & sp): dim(sp.dim), lap(), lapref(lap) {
      try {
	dcfac = new RnDataContainerFactory<Scalar>(dim);
      }
      catch (RVLException & e) {
	e<<"\ncalled from RnSpace constructor\n";
	throw e;
      }
    }

    bool isCompatible(DataContainer const & dc) const {
      try {
	return getLDCF().isCompatible(dc);
      }
      catch (RVLException & e) {
	e<<"\ncalled from RnSpace::isCompatible\n";
	throw e;
      }
    }

    virtual ~RnSpace() {
      if (dcfac) delete dcfac;
    }

    int getSize() const { return dim; }

    virtual void write(RVLException & str) const {
      str<<"RnSpace: simple dense vector space\n";
      str<<"dimension = "<<dim<<"\n";
    }
    virtual ostream & write(ostream & str) const {
      str<<"RnSpace: simple dense vector space\n";
      str<<"dimension = "<<dim<<"\n";
      return str;
    }
  };

}

#endif