blob: 7f629dc5837d0437483b7ded5a4f3c29896c5d3e [file] [log] [blame]
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011 University of California, Los Angeles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Ilya Moiseenko <iliamo@cs.ucla.edu>
*/
#ifndef _NDN_NAME_COMPONENTS_H_
#define _NDN_NAME_COMPONENTS_H_
#include "ns3/simple-ref-count.h"
#include "ns3/attribute.h"
#include "ns3/attribute-helper.h"
#include <string>
#include <algorithm>
#include <list>
#include "ns3/object.h"
#include <boost/ref.hpp>
namespace ns3 {
/**
* \ingroup ccnx
* \brief Hierarchical CCNX name
* A Name element represents a hierarchical name for CCNx content.
* It simply contains a sequence of Component elements.
* Each Component element contains a sequence of zero or more bytes.
* There are no restrictions on what byte sequences may be used.
* The Name element in an Interest is often referred to with the term name prefix or simply prefix.
*/
class CcnxNameComponents : public SimpleRefCount<CcnxNameComponents>
{
public:
/**
* \brief Constructor
* Creates a prefix with zero components (can be looked as root "/")
*/
CcnxNameComponents ();
/**
* \brief Constructor
* Creates a prefix from a list of strings where every string represents a prefix component
* @param[in] components A list of strings
*/
CcnxNameComponents (const std::list<boost::reference_wrapper<const std::string> > &components);
/**
* \brief Generic Add method
* Appends object of type T to the list of components
* @param[in] value The object to be appended
*/
template<class T>
inline void
Add (const T &value);
/**
* \brief Generic constructor operator
* The object of type T will be appended to the list of components
*/
template<class T>
inline CcnxNameComponents&
operator () (const T &value);
/**
* \brief Get a name
* Returns a list of components (strings)
*/
const std::list<std::string> &
GetComponents () const;
std::string
GetLastComponent () const;
/**
* \brief Get subcomponents of the name, starting with first component
* @param[in] num Number of components to return. Valid value is in range [1, GetComponents ().size ()]
*/
std::list<boost::reference_wrapper<const std::string> >
GetSubComponents (size_t num) const;
/**
* \brief Print name
* @param[in] os Stream to print
*/
void Print (std::ostream &os) const;
/**
* \brief Returns the size of CcnxNameComponents
*/
inline size_t
size () const;
/**
* \brief Equality operator for CcnxNameComponents
*/
inline bool
operator== (const CcnxNameComponents &prefix) const;
/**
* \brief Less than operator for CcnxNameComponents
*/
inline bool
operator< (const CcnxNameComponents &prefix) const;
private:
std::list<std::string> m_prefix; ///< \brief a list of strings (components)
typedef std::list<std::string>::iterator iterator;
typedef std::list<std::string>::const_iterator const_iterator;
};
/**
* \brief Print out name components separated by slashes, e.g., /first/second/third
*/
std::ostream &
operator << (std::ostream &os, const CcnxNameComponents &components);
/**
* \brief Read components from input and add them to components. Will read input stream till eof
* Substrings separated by slashes will become separate components
*/
std::istream &
operator >> (std::istream &is, CcnxNameComponents &components);
/**
* \brief Returns the size of CcnxNameComponents object
*/
size_t
CcnxNameComponents::size () const
{
return m_prefix.size ();
}
/**
* \brief Generic constructor operator
* The object of type T will be appended to the list of components
*/
template<class T>
CcnxNameComponents&
CcnxNameComponents::operator () (const T &value)
{
Add (value);
return *this;
}
/**
* \brief Generic Add method
* Appends object of type T to the list of components
* @param[in] value The object to be appended
*/
template<class T>
void
CcnxNameComponents::Add (const T &value)
{
std::ostringstream os;
os << value;
m_prefix.push_back (os.str ());
}
/**
* \brief Equality operator for CcnxNameComponents
*/
bool
CcnxNameComponents::operator== (const CcnxNameComponents &prefix) const
{
if (m_prefix.size () != prefix.m_prefix.size ())
return false;
return std::equal (m_prefix.begin (), m_prefix.end (), prefix.m_prefix.begin ());
}
/**
* \brief Less than operator for CcnxNameComponents
*/
bool
CcnxNameComponents::operator< (const CcnxNameComponents &prefix) const
{
return std::lexicographical_compare (m_prefix.begin (), m_prefix.end (),
prefix.m_prefix.begin (), prefix.m_prefix.end ());
}
/**
* \class ns3::ComponentsValue
* \brief hold objects of type ns3:CcnxNameComponents
*/
ATTRIBUTE_HELPER_HEADER (CcnxNameComponents);
} // namespace ns3
#endif // _NDN_NAME_COMPONENTS_H_