MueLu_MasterList.hpp

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//        MueLu: A package for multigrid based preconditioning
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#ifndef MUELU_MASTERLIST_HPP
#define MUELU_MASTERLIST_HPP

#include <sstream>
#include <map>

#include <Teuchos_ParameterList.hpp>
#include <Teuchos_ParameterEntry.hpp>
#include <Teuchos_any.hpp>

namespace MueLu {

template <typename T, typename U>
class DefaultProblemStrings;

class MasterList {
 public:
  static Teuchos::RCP<const Teuchos::ParameterList> List();
  static Teuchos::RCP<Teuchos::ParameterList> GetProblemSpecificList(std::string const& problemType);

  template <typename T>
  static const T& getDefault(const std::string& name) {
    return List()->get<T>(name);
  }

  static const Teuchos::ParameterEntry& getEntry(const std::string& name) {
    return List()->getEntry(name);
  }

  template <typename T>
  static std::string generateXMLParameterString(const std::string& name, T data) {
    Teuchos::ParameterEntry entry = getEntry(name);
    std::stringstream ss;
    // TODO: check whether getAny().typeName() matches the typeid(T)
    //       One could use a technique as described here: http://stackoverflow.com/questions/4484982/how-to-convert-typename-t-to-string-in-c
    ss << "<Parameter name=\"" << name << "\" type=\"" << entry.getAny().typeName() << "\" value=\"" << data << "\"/>";
    return ss.str();
  }

  static std::string ML2MueLu(const std::string& name) {
    std::map<std::string, std::string>::iterator it;
    it = ML2MueLuLists_.find(name);
    if (it != ML2MueLuLists_.end())
      return it->second;
    else
      return "";
  }

  static std::string interpretParameterName(const std::string& name, const std::string& value);

 private:
  MasterList();
  MasterList(const MasterList&);
  MasterList& operator=(const MasterList&);

  static Teuchos::RCP<Teuchos::ParameterList> masterList_;
  static const std::string stringList_;
  static Teuchos::RCP<Teuchos::ParameterList> problemSpecificList_;
  static std::string problemType_;
  static std::map<std::string, std::string> DefaultProblemTypeLists_;
  static std::map<std::string, std::string> ML2MueLuLists_;
};

template <typename T, typename U>
class DefaultProblemStrings {
 public:
  DefaultProblemStrings(const T& key, const U& val) {
    map_[key] = val;
  }

  DefaultProblemStrings<T, U>& operator()(const T& key, const U& val) {
    map_[key] = val;
    return *this;
  }

  operator std::map<T, U>() const {
    return map_;
  }

 private:
  std::map<T, U> map_;
};

}  // namespace MueLu

#endif