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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/**
* Copyright (C) 2013 Regents of the University of California.
* @author: Jeff Thompson <jefft0@remap.ucla.edu>
* See COPYING for copyright and distribution information.
*/
#ifndef NDN_DATA_HPP
#define NDN_DATA_HPP
#include "common.hpp"
#include "name.hpp"
#include "encoding/block.hpp"
#include "signature.hpp"
#include "meta-info.hpp"
#include "key-locator.hpp"
namespace ndn {
class Data {
public:
struct Error : public std::runtime_error { Error(const std::string &what) : std::runtime_error(what) {} };
/**
* @brief Create an empty Data object
*/
inline
Data();
/**
* @brief Create a new Data object with the given name
* @param name A reference to the name which is copied.
*/
inline
Data(const Name& name);
/**
* @brief The virtual destructor.
*/
inline virtual
~Data();
/**
* @brief Encode this Data for a wire format.
* @return The encoded byte array.
*/
const Block&
wireEncode() const;
/**
* @brief Decode the input using a particular wire format and update this Data.
* @param input The input byte array to be decoded.
*/
void
wireDecode(const Block &wire);
inline const Name&
getName() const;
/**
* @brief Set name to a copy of the given Name.
*
* @param name The Name which is copied.
* @return This Data so that you can chain calls to update values.
*/
inline void
setName(const Name& name);
inline const MetaInfo&
getMetaInfo() const;
/**
* @brief Set metaInfo to a copy of the given MetaInfo.
* @param metaInfo The MetaInfo which is copied.
* @return This Data so that you can chain calls to update values.
*/
inline void
setMetaInfo(const MetaInfo& metaInfo);
///////////////////////////////////////////////////////////////
// MetaInfo proxy methods
inline uint32_t
getContentType() const;
inline void
setContentType(uint32_t type);
inline Milliseconds
getFreshnessPeriod() const;
inline void
setFreshnessPeriod(Milliseconds freshnessPeriod);
/**
* @brief Get content Block
*
* To access content value, one can use value()/value_size() or
* value_begin()/value_end() methods of the Block class
*/
inline const Block&
getContent() const;
/**
* @brief Set the content to a copy of the data in the vector.
* @param content A vector whose contents are copied.
* @return This Data so that you can chain calls to update values.
*/
inline void
setContent(const uint8_t* content, size_t contentLength);
inline void
setContent(const Block& content);
inline void
setContent(const ConstBufferPtr &contentValue);
inline const Signature&
getSignature() const;
/**
* @brief Set the signature to a copy of the given signature.
* @param signature The signature object which is cloned.
* @return This Data so that you can chain calls to update values.
*/
inline Data&
setSignature(const Signature& signature);
private:
/**
* @brief Clear the wire encoding.
*/
inline void
onChanged();
private:
Name name_;
MetaInfo metaInfo_;
mutable Block content_;
Signature signature_;
mutable Block wire_;
};
inline
Data::Data()
{
}
inline
Data::Data(const Name& name)
: name_(name)
{
}
inline
Data::~Data()
{
}
inline const Name&
Data::getName() const
{
return name_;
}
inline void
Data::setName(const Name& name)
{
onChanged();
name_ = name;
}
inline const MetaInfo&
Data::getMetaInfo() const
{
return metaInfo_;
}
inline void
Data::setMetaInfo(const MetaInfo& metaInfo)
{
onChanged();
metaInfo_ = metaInfo;
}
inline uint32_t
Data::getContentType() const
{
return metaInfo_.getType();
}
inline void
Data::setContentType(uint32_t type)
{
onChanged();
metaInfo_.setType(type);
}
inline Milliseconds
Data::getFreshnessPeriod() const
{
return metaInfo_.getFreshnessPeriod();
}
inline void
Data::setFreshnessPeriod(Milliseconds freshnessPeriod)
{
onChanged();
metaInfo_.setFreshnessPeriod(freshnessPeriod);
}
inline const Block&
Data::getContent() const
{
if (!content_.hasWire())
content_.encode();
return content_;
}
inline void
Data::setContent(const uint8_t* content, size_t contentLength)
{
onChanged();
OBufferStream os;
Tlv::writeVarNumber(os, Tlv::Content);
Tlv::writeVarNumber(os, contentLength);
os.write(reinterpret_cast<const char *>(content), contentLength);
content_ = Block(os.buf());
}
inline void
Data::setContent(const ConstBufferPtr &contentValue)
{
onChanged();
content_ = Block(Tlv::Content, contentValue); // not real a wire encoding yet
}
inline void
Data::setContent(const Block& content)
{
onChanged();
content_ = content;
}
inline const Signature&
Data::getSignature() const
{
return signature_;
}
inline Data&
Data::setSignature(const Signature& signature)
{
onChanged();
signature_ = signature;
return *this;
}
inline void
Data::onChanged()
{
// The values have changed, so the wire format is invalidated
// !!!Note!!! Signature is not invalidated and it is responsibility of
// the application to do proper re-signing if necessary
wire_ = Block();
}
std::ostream&
operator << (std::ostream &os, const Data &data);
} // namespace ndn
#endif