interval.hpp

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
#ifndef NDN_INTERVAL_HPP
#define NDN_INTERVAL_HPP

#include <exception>
#include "../common.hpp"

namespace ndn {

class Interval {
public:
  class Error : public std::exception {
  public:
    Error(const std::string& errorMessage) throw();

    virtual ~Error() throw();

    std::string
    Msg() const { return errorMessage_; }

    virtual const char* 
    what() const throw();

  private:
    const std::string errorMessage_;
  };

  Interval(bool isValid = false);


  Interval(MillisecondsSince1970 startTime, MillisecondsSince1970 endTime);

  void
  set(const Interval& interval)
  {
    startTime_ = interval.startTime_;
    endTime_ = interval.endTime_;
    isValid_ = interval.isValid_;
  }

  bool
  covers(MillisecondsSince1970 timePoint) const;

  Interval&
  intersectWith(const Interval& interval);

  Interval&
  unionWith(const Interval& interval);

  MillisecondsSince1970
  getStartTime() const;

  MillisecondsSince1970
  getEndTime() const;

  bool
  isValid() const { return isValid_; }

  bool
  isEmpty() const;

private:
  MillisecondsSince1970 startTime_;
  MillisecondsSince1970 endTime_;
  bool isValid_;
};

}

#endif