/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2014 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
 *
 * ndn-cxx library is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 *
 * You should have received copies of the GNU General Public License and GNU Lesser
 * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
 */

#ifndef NDN_PIB_GET_PARAM_HPP
#define NDN_PIB_GET_PARAM_HPP

#include "pib-common.hpp"
#include <ndn-cxx/name.hpp>

namespace ndn {
namespace pib {

/**
 * @brief GetParam is the abstraction of PIB Get parameter.
 *
 * PibGetParam := PIB-GET-PARAM-TYPE TLV-LENGTH
 *                PibType
 *                Name?
 *
 * @sa http://redmine.named-data.net/projects/ndn-cxx/wiki/PublicKey_Info_Base#Get-Parameters
 */

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

  GetParam();

  GetParam(const pib::Type targetType, const Name& targetName);

  explicit
  GetParam(const Block& wire);

  tlv::pib::ParamType
  getParamType() const
  {
    return tlv::pib::GetParam;
  }

  pib::Type
  getTargetType() const
  {
    return m_targetType;
  }

  /**
   * @brief Get target name
   *
   * @throws Error if target name does not exist
   */
  const Name&
  getTargetName() const;

  /// @brief Encode to a wire format or estimate wire format
  template<bool T>
  size_t
  wireEncode(EncodingImpl<T>& block) const;

  /**
   * @brief Encode to a wire format
   *
   * @throws Error if encoding fails
   */
  const Block&
  wireEncode() const;

  /**
   * @brief Decode GetParam from a wire encoded block
   *
   * @throws Error if decoding fails
   */
  void
  wireDecode(const Block& wire);

public:
  static const std::string VERB;

private:
  pib::Type m_targetType;
  Name m_targetName;

  mutable Block m_wire;
};

} // namespace pib
} // namespace ndn

#endif // NDN_PIB_GET_PARAM_HPP