/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/**
 * Copyright (C) 2013 Regents of the University of California.
 * @author: Yingdi Yu <yingdi@cs.ucla.edu>
 * See COPYING for copyright and distribution information.
 */

#ifndef NDN_UTIL_REGEX_BACKREF_MANAGER_HPP
#define NDN_UTIL_REGEX_BACKREF_MANAGER_HPP

#include "../../common.hpp"

namespace ndn {

class RegexMatcher;

class RegexBackrefManager
{
public:
  RegexBackrefManager(){}
    
  virtual ~RegexBackrefManager();
    
  int 
  pushRef(shared_ptr<RegexMatcher> matcher);
    
  void 
  popRef();

  int 
  size();
    
  shared_ptr<RegexMatcher> 
  getBackRef(int i);
    
private:
  std::vector<shared_ptr<RegexMatcher> > m_backRefs;
};


inline RegexBackrefManager::~RegexBackrefManager()
{
  m_backRefs.clear();
}

inline int 
RegexBackrefManager::pushRef(shared_ptr<RegexMatcher> matcher)
{
  int last = m_backRefs.size();
  m_backRefs.push_back(matcher);

  return last;
}

inline void
RegexBackrefManager::popRef()
{
  m_backRefs.pop_back();
}

inline int 
RegexBackrefManager::size()
{
  return m_backRefs.size();
}
    
inline shared_ptr<RegexMatcher> 
RegexBackrefManager::getBackRef(int i)
{
  return m_backRefs[i];
}


} // namespace ndn

#endif // NDN_UTIL_REGEX_BACKREF_MANAGER_HPP