Teko_CloneFactory.hpp

// @HEADER
// *****************************************************************************
//      Teko: A package for block and physics based preconditioning
//
// Copyright 2010 NTESS and the Teko contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef __Teko_CloneFactory_hpp__
#define __Teko_CloneFactory_hpp__

#include "Teuchos_RCP.hpp"

namespace Teko {

class Cloneable {
 public:
  virtual ~Cloneable() {}

  virtual Teuchos::RCP<Cloneable> clone() const = 0;
};

class AutoCloneDummy {};

template <class CloneType, class BaseType = AutoCloneDummy>
class AutoClone : public Cloneable, public BaseType {
 public:
  virtual ~AutoClone() {}

  AutoClone() : BaseType() {}

  virtual Teuchos::RCP<Cloneable> clone() const {
    return Teuchos::rcp(new AutoClone<CloneType, CloneType>());
  }

 private:
  // hidden
  AutoClone(const AutoClone<BaseType>&);
};

template <class CloneBaseType>
class CloneFactory {
 public:
  CloneFactory() {}

  CloneFactory(const CloneFactory<CloneBaseType>& cf) : parentClones_(cf.parentClones_) {}

  virtual ~CloneFactory() {}

  virtual Teuchos::RCP<CloneBaseType> build(const std::string& str) const {
    std::map<std::string, Teuchos::RCP<const Cloneable> >::const_iterator itr =
        parentClones_.find(str);
    if (itr == parentClones_.end()) return Teuchos::null;
    return Teuchos::rcp_dynamic_cast<CloneBaseType>(itr->second->clone(), true);
  }

  virtual void addClone(const std::string& str, const Teuchos::RCP<Cloneable>& clone) {
    parentClones_[str] = clone;
  }

  virtual int cloneCount() const { return parentClones_.size(); }

  void getCloneNames(std::vector<std::string>& names) const {
    std::map<std::string, Teuchos::RCP<const Cloneable> >::const_iterator itr;
    for (itr = parentClones_.begin(); itr != parentClones_.end(); ++itr)
      names.push_back(itr->first);
  }

 protected:
  std::map<std::string, Teuchos::RCP<const Cloneable> > parentClones_;
};

}  // namespace Teko

#endif