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/* -*- 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_REGEX_COMPONENT_MATCHER_HPP
#define NDN_UTIL_REGEX_REGEX_COMPONENT_MATCHER_HPP
#include <boost/regex.hpp>
#include "regex-matcher.hpp"
#include "regex-pseudo-matcher.hpp"
namespace ndn {
class RegexComponentMatcher : public RegexMatcher
{
public:
/**
* @brief Create a RegexComponent matcher from expr
* @param expr The standard regular expression to match a component
* @param backRefManager The back reference manager
* @param exact The flag to provide exact match
*/
RegexComponentMatcher(const std::string& expr,
ptr_lib::shared_ptr<RegexBackrefManager> backRefManager,
bool exact = true);
virtual ~RegexComponentMatcher() {};
virtual bool
match(const Name & name, const int & offset, const int &len = 1);
protected:
/**
* @brief Compile the regular expression to generate the more matchers when necessary
* @returns true if compiling succeeds
*/
virtual void
compile();
private:
bool m_exact;
boost::regex m_componentRegex;
std::vector<ptr_lib::shared_ptr<RegexPseudoMatcher> > m_pseudoMatcher;
};
inline
RegexComponentMatcher::RegexComponentMatcher (const std::string& expr,
ptr_lib::shared_ptr<RegexBackrefManager> backRefManager,
bool exact)
: RegexMatcher (expr, EXPR_COMPONENT, backRefManager),
m_exact(exact)
{
// _LOG_TRACE ("Enter RegexComponentMatcher Constructor: ");
compile();
// _LOG_TRACE ("Exit RegexComponentMatcher Constructor: ");
}
inline void
RegexComponentMatcher::compile ()
{
// _LOG_TRACE ("Enter RegexComponentMatcher::compile");
m_componentRegex = boost::regex (m_expr);
m_pseudoMatcher.clear();
m_pseudoMatcher.push_back(ptr_lib::make_shared<RegexPseudoMatcher>());
for (size_t i = 1; i < m_componentRegex.mark_count(); i++)
{
ptr_lib::shared_ptr<RegexPseudoMatcher> pMatcher = ptr_lib::make_shared<RegexPseudoMatcher>();
m_pseudoMatcher.push_back(pMatcher);
m_backrefManager->pushRef(ptr_lib::static_pointer_cast<RegexMatcher>(pMatcher));
}
// _LOG_TRACE ("Exit RegexComponentMatcher::compile");
}
inline bool
RegexComponentMatcher::match (const Name & name, const int & offset, const int & len)
{
// _LOG_TRACE ("Enter RegexComponentMatcher::match ");
m_matchResult.clear();
if("" == m_expr)
{
m_matchResult.push_back(name.get(offset));
return true;
}
if(true == m_exact)
{
boost::smatch subResult;
std::string targetStr = name.get(offset).toEscapedString();
if(boost::regex_match(targetStr, subResult, m_componentRegex))
{
for (size_t i = 1; i < m_componentRegex.mark_count(); i++)
{
m_pseudoMatcher[i]->resetMatchResult();
m_pseudoMatcher[i]->setMatchResult(subResult[i]);
}
m_matchResult.push_back(name.get(offset));
return true;
}
}
else
{
throw RegexMatcher::Error("Non-exact component search is not supported yet!");
}
return false;
}
} // namespace ndn
#endif // NDN_UTIL_REGEX_REGEX_COMPONENT_MATCHER_HPP