meta-info.hpp

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

#include "common.hpp"
#include "encoding/block.hpp"
#include "encoding/encoding-buffer.hpp"
#include "util/time.hpp"
#include "name-component.hpp"
#include <list>

namespace ndn {

class MetaInfo
{
public:
  class Error : public tlv::Error
  {
  public:
    explicit
    Error(const std::string& what)
      : tlv::Error(what)
    {
    }
  };

  MetaInfo();

  explicit
  MetaInfo(const Block& block);

  template<encoding::Tag TAG>
  size_t
  wireEncode(EncodingImpl<TAG>& encoder) const;

  const Block&
  wireEncode() const;

  void
  wireDecode(const Block& wire);

public: // getter/setter
  uint32_t
  getType() const;

  MetaInfo&
  setType(uint32_t type);

  const time::milliseconds&
  getFreshnessPeriod() const;

  MetaInfo&
  setFreshnessPeriod(const time::milliseconds& freshnessPeriod);

  const name::Component&
  getFinalBlockId() const;

  MetaInfo&
  setFinalBlockId(const name::Component& finalBlockId);

public: // app-defined MetaInfo items
  const std::list<Block>&
  getAppMetaInfo() const;

  MetaInfo&
  setAppMetaInfo(const std::list<Block>& info);

  MetaInfo&
  addAppMetaInfo(const Block& block);

  bool
  removeAppMetaInfo(uint32_t tlvType);

  const Block*
  findAppMetaInfo(uint32_t tlvType) const;

public: // EqualityComparable concept
  bool
  operator==(const MetaInfo& other) const;

  bool
  operator!=(const MetaInfo& other) const;

private:
  uint32_t m_type;
  time::milliseconds m_freshnessPeriod;
  name::Component m_finalBlockId;
  std::list<Block> m_appMetaInfo;

  mutable Block m_wire;
};

std::ostream&
operator<<(std::ostream& os, const MetaInfo& info);


inline uint32_t
MetaInfo::getType() const
{
  return m_type;
}

inline const time::milliseconds&
MetaInfo::getFreshnessPeriod() const
{
  return m_freshnessPeriod;
}

inline const name::Component&
MetaInfo::getFinalBlockId() const
{
  return m_finalBlockId;
}

inline bool
MetaInfo::operator==(const MetaInfo& other) const
{
  return wireEncode() == other.wireEncode();
}

inline bool
MetaInfo::operator!=(const MetaInfo& other) const
{
  return !(*this == other);
}

} // namespace ndn

#endif // NDN_META_INFO_HPP