MueLu_VariableContainer.hpp

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//        MueLu: A package for multigrid based preconditioning
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#ifndef MUELU_VARIABLECONTAINER_HPP
#define MUELU_VARIABLECONTAINER_HPP
 
#include <map>
 
#include <Teuchos_TypeNameTraits.hpp>
 
#include <Xpetra_Matrix.hpp>
#include <Xpetra_Operator.hpp>
 
#include "MueLu_ConfigDefs.hpp"
#include "MueLu_BaseClass.hpp"
 
#include "MueLu_Exceptions.hpp"
#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_KeepType.hpp"
 
namespace MueLu {
 
  class VariableContainer : public BaseClass {
  private:
    // Motivated by Teuchos_any.hpp
    class DataBase {
    public:
      virtual ~DataBase() {}
      virtual const std::type_info& type() const = 0;
      virtual std::string typeName() const = 0;
    };
 
    template<typename T>
    class Data : public DataBase {
    public:
      Data(const T& data) : data_(data) {}
      const std::type_info& type() const { return typeid(T); }
      std::string typeName() const { return Teuchos::TypeNameTraits<T>::name(); }
      T data_;
    };
 
    template<typename T>
    struct Getter {
      static T& get(DataBase* data_, DataBase*& datah_) {
        if ((data_ == NULL) || (data_->type() != typeid(T))) // NVR added guard to avoid determining typeName unless we will use it
        {
          const std::string typeName = Teuchos::TypeNameTraits<T>::name(); // calls Teuchos::demangleName(), which can be expensive
          TEUCHOS_TEST_FOR_EXCEPTION(data_ == NULL, Teuchos::bad_any_cast,
                                     "Error, cast to type Data<" << typeName << "> failed since the content is NULL");
        
          TEUCHOS_TEST_FOR_EXCEPTION(data_->type() != typeid(T), Teuchos::bad_any_cast,
                                     "Error, cast to type Data<" << typeName << "> failed since the actual underlying type is "
                                     "\'" << data_->typeName() << "!");
        }
 
        Data<T>* data = dynamic_cast<Data<T>*>(data_);
        if (!data) // NVR added guard to avoid determining typeName unless we will use it
        {
          const std::string typeName = Teuchos::TypeNameTraits<T>::name(); // calls Teuchos::demangleName(), which can be expensive
          TEUCHOS_TEST_FOR_EXCEPTION(!data, std::logic_error,
                                     "Error, cast to type Data<" << typeName << "> failed but should not have and the actual underlying type is "
                                     "\'" << data_->typeName() << "! The problem might be related to incompatible RTTI systems in static and shared libraries!");
        }
        return data->data_;
      }
    };
 
 
  public:
    typedef std::map<const FactoryBase*,int> request_container;
 
  private:
    DataBase*          data_;        
    mutable
    DataBase*          datah_;       
    bool               available_;   
    KeepType           keep_;        
    int                count_;       
 
    request_container  requests_;    
 
  public:
 
 
    VariableContainer() : data_(NULL), datah_(NULL), available_(false), keep_(false), count_(0) { }
    ~VariableContainer() {
      delete data_;   data_  = NULL;
      delete datah_;  datah_ = NULL;
    }
 
 
 
 
    template<typename T>
    void SetData(const T& entry) {
      delete data_;
      delete datah_;
      data_      = new Data<T>(entry);
      datah_     = NULL;
      available_ = true;
    }
 
    template<typename T>
    const T& GetData() const {
      return Getter<T>::get(data_, datah_);
    }
 
    template<typename T>
    T& GetData() {
      return Getter<T>::get(data_, datah_);
    }
 
    std::string GetTypeName() {
      if (data_ == NULL)
        return std::string("");
      return data_->typeName();
    }
 
    //  if SetData has been called before
    bool IsAvailable() const { return available_; }
 
 
 
 
    void Request(const FactoryBase* reqFactory) {
      request_container::iterator it = requests_.find(reqFactory);
      if (it == requests_.end())
        requests_[reqFactory] = 1;
      else
        (it->second)++;
      count_++;   // increment request counter
    }
 
    void Release(const FactoryBase* reqFactory) {
      request_container::iterator it = requests_.find(reqFactory);
      TEUCHOS_TEST_FOR_EXCEPTION(it == requests_.end(), Exceptions::RuntimeError, "MueLu::VariableContainer::Release(): "
                                 "cannot call Release if factory has not been requested before by factory " << reqFactory);
      if (--(it->second) == 0)
        requests_.erase(it);
      count_--;
    }
 
    int NumRequests(const FactoryBase* reqFactory) const {
      request_container::const_iterator it = requests_.find(reqFactory);
      return (it != requests_.end()) ? it->second : 0;
    }
 
    int NumAllRequests() const                                                  { return count_; }
 
    bool IsRequested(const FactoryBase* reqFactory) const                       { return (NumRequests(reqFactory) > 0); }
 
    bool IsRequested() const                                                    { return (count_ > 0); }
 
    const request_container& Requests() const                                   { return requests_; }
 
 
 
    bool IsKept(KeepType keep) const                                            { return keep_ & keep; }
 
    void AddKeepFlag(KeepType keep = UserData)                                  { keep_ |= keep; }
 
    void RemoveKeepFlag(KeepType keep = UserData)                               { keep_ = keep_ & (keep_ ^ keep); }
 
    KeepType GetKeepFlag() const                                                { return keep_; }
 
  };
 
 
  template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  struct VariableContainer::Getter<Teuchos::RCP<Xpetra::Operator<Scalar,LocalOrdinal,GlobalOrdinal,Node> > > {
    typedef Xpetra::Operator<Scalar,LocalOrdinal,GlobalOrdinal,Node> Operator;
    typedef Xpetra::Matrix  <Scalar,LocalOrdinal,GlobalOrdinal,Node> Matrix;
 
    static Teuchos::RCP<Operator>& get(DataBase* data_, DataBase*& datah_) {
      typedef Teuchos::RCP<Operator> TO;
      typedef Teuchos::RCP<Matrix>   TM;
 
      if (data_ == NULL) // NVR added guard to avoid unnecessary call to TypeNameTraits<TO>::name(), which calls Teuchos::demangleName(), which can be expensive
      {
        TEUCHOS_TEST_FOR_EXCEPTION(data_ == NULL, Teuchos::bad_any_cast,
                                   "Error, cast to type Data<" << Teuchos::TypeNameTraits<TO>::name() << "> failed since the content is NULL");
      }
      if (data_->type() == typeid(TO)) {
        Data<TO>* data = dynamic_cast<Data<TO>*>(data_);
        if (!data) // NVR added guard to avoid unnecessary call to TypeNameTraits<TO>::name(), which calls Teuchos::demangleName(), which can be expensive
        {
          TEUCHOS_TEST_FOR_EXCEPTION(!data, std::logic_error,
                                     "Error, cast to type Data<" << Teuchos::TypeNameTraits<TO>::name() << "> failed but should not have and the actual underlying type is "
                                     "\'" << data_->typeName() << "! The problem might be related to incompatible RTTI systems in static and shared libraries!");
        }
        return data->data_;
      }
 
      if (data_->type() != typeid(TM)) // NVR added guard to avoid unnecessary call to TypeNameTraits<TO>::name(), which calls Teuchos::demangleName(), which can be expensive
      {
        TEUCHOS_TEST_FOR_EXCEPTION(data_->type() != typeid(TM), Teuchos::bad_any_cast,
                                   "Error, cast to type Data<" << Teuchos::TypeNameTraits<TM>::name() << "> failed since the actual underlying type is "
                                   "\'" << data_->typeName() << "!");
      }
      Data<TM>* data = dynamic_cast<Data<TM>*>(data_);
      if (!data) // NVR added guard to avoid unnecessary call to TypeNameTraits<TO>::name(), which calls Teuchos::demangleName(), which can be expensive
      {
        TEUCHOS_TEST_FOR_EXCEPTION(!data, std::logic_error,
                                   "Error, cast to type Data<" << Teuchos::TypeNameTraits<TM>::name() << "> failed but should not have and the actual underlying type is "
                                   "\'" << data_->typeName() << "! The problem might be related to incompatible RTTI systems in static and shared libraries!");
      }
      if (datah_ == NULL)
        datah_ = new Data<TO>(Teuchos::rcp_dynamic_cast<Operator>(data->data_));
      Data<TO>* datah = dynamic_cast<Data<TO>*>(datah_);
      
      if (!datah) // NVR added guard to avoid unnecessary call to TypeNameTraits<TO>::name(), which calls Teuchos::demangleName(), which can be expensive
      {
        TEUCHOS_TEST_FOR_EXCEPTION(!datah, std::logic_error,
                                   "Error, cast to type Data<" << Teuchos::TypeNameTraits<TO>::name() << "> failed but should not have and the actual underlying type is "
                                   "\'" << datah_->typeName() << "! The problem might be related to incompatible RTTI systems in static and shared libraries!");
      }
      return datah->data_;
    }
  };
 
}
 
#endif /* MUELU_VARIABLECONTAINER_HPP */