IRule.hpp

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#ifndef HTGS_IRULE_HPP
#define HTGS_IRULE_HPP

#include <iostream>
#include <functional>
#include <list>
#include <mutex>
#include <htgs/core/rules/AnyIRule.hpp>

#include <htgs/api/IData.hpp>

namespace htgs {

template<class T>
class StateContainer;

template<class T, class U>
class IRule : public AnyIRule {
  static_assert(std::is_base_of<IData, T>::value, "T must derive from IData");
  static_assert(std::is_base_of<IData, U>::value, "U must derive from IData");
 public:

  IRule() : AnyIRule() {
    output = new std::list<std::shared_ptr<U>>();
  }

  IRule(bool useLocks) : AnyIRule(useLocks) {
    output = new std::list<std::shared_ptr<U>>();
  }


  virtual ~IRule() override {
    if (output != nullptr) {
      output->clear();
      delete output;
      output = nullptr;
    }
  }

  virtual bool canTerminateRule(size_t pipelineId) override { return false; }

  virtual void shutdownRule(size_t pipelineId) override {}

  virtual std::string getName() override {
    return "Unnamed IRule";
  }

  virtual void applyRule(std::shared_ptr<T> data, size_t pipelineId) = 0;



  std::list<std::shared_ptr<U>> *applyRuleFunction(std::shared_ptr<T> data, size_t pipelineId) {
    this->output->clear();
    applyRule(data, pipelineId);
    return output;
  }

  void addResult(std::shared_ptr<U> result) {
    this->output->push_back(result);
  }

  void addResult(U *result) {
    this->output->push_back(std::shared_ptr<U>(result));
  }

  StateContainer<std::shared_ptr<T>> *allocStateContainer(size_t height, size_t width) {
    return new StateContainer<std::shared_ptr<T>>(height, width, nullptr);
  }

  template<class V>
  StateContainer<V> *allocStateContainer(size_t height, size_t width, V defaultValue) {
    return new StateContainer<V>(height, width, defaultValue);
  }

  StateContainer<std::shared_ptr<T>> *allocStateContainer(size_t size) {
    return new StateContainer<std::shared_ptr<T>>(size, 1, nullptr);
  }

  template<class V>
  StateContainer<V> *allocStateContainer(size_t size, V defaultValue) {
    return new StateContainer<V>(size, 1, defaultValue);
  }

 private:
  std::list<std::shared_ptr<U>>
      *output; 
};

template<class T>
class StateContainer {

 public:
  StateContainer(size_t height, size_t width, T emptyData) {
    this->width = width;
    this->height = height;
    this->emptyData = emptyData;
    data = new T[width * height];

    for (size_t i = 0; i < width * height; i++) {
      data[i] = this->emptyData;
    }
  }

  ~StateContainer() {
    delete[]data;
  }

  void set(size_t row, size_t col, T &value) const {
    data[computeIndex(row, col)] = value;
  }

  void assign(size_t row, size_t col, T value) const {
    data[computeIndex(row, col)] = value;
  }

  void set(size_t index, T &value) const {
    data[index] = value;
  }

  void assign(size_t index, T value) const {
    data[index] = value;
  }

  T &get(size_t row, size_t col) const {
    return data[computeIndex(row, col)];
  }

  T &get(size_t index) const {
    return data[index];
  }

  void remove(size_t row, size_t col) {
    set(row, col, emptyData);
  }

  void remove(size_t index) {
    set(index, emptyData);
  }

  bool has(size_t row, size_t col) const {
    return data[computeIndex(row, col)] != emptyData;
  }

  bool has(size_t index) const {
    return data[index] != emptyData;
  }

  void printState() {
    for (size_t r = 0; r < height; r++) {
      for (size_t c = 0; c < width; c++) {
        if (this->has(r, c))
          std::cout << "1";
        else
          std::cout << "0";
      }
      std::cout << std::endl;
    }
  }

  void printContents() {
    for (size_t r = 0; r < height; r++) {
      for (size_t c = 0; c < width; c++) {
        std::cout << this->get(r, c) << " ";
      }
      std::cout << std::endl;
    }
  }

 private:
  size_t computeIndex(size_t row, size_t col) const {
    return row * width + col;
  }

  T *data; 
  size_t width; 
  size_t height; 
  T emptyData; 
};

}

#endif //HTGS_IRULE_HPP