Classifier.cpp

#include "Classifier.hpp"
#include "util.hpp"
#include "OneWordNetwork.hpp"
#include "ConcatWordsNetwork.hpp"
#include "RLTNetwork.hpp"
#include "CNNNetwork.hpp"

Classifier::Classifier(const std::string & name, const std::string & topology, const std::string & tsFile)
{
  this->name = name;
  this->transitionSet.reset(new TransitionSet(tsFile));
  initNeuralNetwork(topology);
}

TransitionSet & Classifier::getTransitionSet()
{
  return *transitionSet;
}

NeuralNetwork & Classifier::getNN()
{
  return reinterpret_cast<NeuralNetwork&>(nn);
}

const std::string & Classifier::getName() const
{
  return name;
}

void Classifier::initNeuralNetwork(const std::string & topology)
{
  static std::vector<std::tuple<std::regex, std::string, std::function<void(const std::smatch &)>>> initializers
  {
    {
      std::regex("OneWord\\(([+\\-]?\\d+)\\)"),
      "OneWord(focusedIndex) : Only use the word embedding of the focused word.",
      [this,topology](auto sm)
      {
        this->nn.reset(new OneWordNetworkImpl(this->transitionSet->size(), std::stoi(sm[1])));
      }
    },
    {
      std::regex("ConcatWords\\(([+\\-]?\\d+),([+\\-]?\\d+),([+\\-]?\\d+)\\)"),
      "ConcatWords(leftBorder,rightBorder,nbStack) : Concatenate embeddings of words in context.",
      [this,topology](auto sm)
      {
        this->nn.reset(new ConcatWordsNetworkImpl(this->transitionSet->size(), std::stoi(sm[1]), std::stoi(sm[2]), std::stoi(sm[3])));
      }
    },
    {
      std::regex("CNN\\((\\d+),(\\d+),(\\d+),\\{(.*)\\},\\{(.*)\\},\\{(.*)\\},\\{(.*)\\}\\)"),
      "CNN(leftBorder,rightBorder,nbStack,{focusedBuffer},{focusedStack},{focusedColumns}) : CNN to capture context.",
      [this,topology](auto sm)
      {
        std::vector<long> focusedBuffer, focusedStack;
        std::vector<std::string> focusedColumns, columns;
        for (auto s : util::split(std::string(sm[4]), ','))
          columns.emplace_back(s);
        for (auto s : util::split(std::string(sm[5]), ','))
          focusedBuffer.push_back(std::stoi(std::string(s)));
        for (auto s : util::split(std::string(sm[6]), ','))
          focusedStack.push_back(std::stoi(std::string(s)));
        for (auto s : util::split(std::string(sm[7]), ','))
          focusedColumns.emplace_back(s);
        this->nn.reset(new CNNNetworkImpl(this->transitionSet->size(), std::stoi(sm[1]), std::stoi(sm[2]), std::stoi(sm[3]), columns, focusedBuffer, focusedStack, focusedColumns));
      }
    },
    {
      std::regex("RLT\\(([+\\-]?\\d+),([+\\-]?\\d+),([+\\-]?\\d+)\\)"),
      "RLT(leftBorder,rightBorder,nbStack) : Recursive tree LSTM.",
      [this,topology](auto sm)
      {
        this->nn.reset(new RLTNetworkImpl(this->transitionSet->size(), std::stoi(sm[1]), std::stoi(sm[2]), std::stoi(sm[3])));
      }
    },
  };

  for (auto & initializer : initializers)
    if (util::doIfNameMatch(std::get<0>(initializer),topology,std::get<2>(initializer)))
    {
      this->nn->to(NeuralNetworkImpl::device);
      return;
    }

  std::string errorMessage = fmt::format("Unknown neural network '{}', available networks :\n", topology);
  for (auto & initializer : initializers)
    errorMessage += std::get<1>(initializer) + "\n";

  util::myThrow(errorMessage);
}