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/*
Ousía
Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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, see <http://www.gnu.org/licenses/>.
*/
/**
* @file TokenRegistry.hpp
*
* Contains the TokenRegistry class used for registering all possible tokens
* during the parsing process.
*
* @author Andreas Stöckel (astoecke@techfak.uni-bielefeld.de)
*/
#ifndef _OUSIA_PARSER_STACK_TOKEN_REGISTRY_HPP_
#define _OUSIA_PARSER_STACK_TOKEN_REGISTRY_HPP_
#include <string>
#include <unordered_map>
#include "Callbacks.hpp"
namespace ousia {
namespace parser_stack {
/**
* The TokenRegistry class is used for registering all possible tokens during
* the Parsing process. The TokenRegistry class acts as an adapter between the
* parser which allocates TokenId for each unique token and the Handler classes
* which may register tokens multiple times and expect the same TokenId to be
* returned for the same token.
*/
class TokenRegistry : public ParserCallbacks {
private:
/**
* Reference at the ParserCallback instance the tokens are relayed to.
*/
ParserCallbacks &parser;
/**
* Store containing all TokenId instances for all registered tokens. The map
* maps from the token strings to the corresponding TokenId and a reference
* count.
*/
std::unordered_map<std::string, std::pair<TokenId, size_t>> tokens;
/**
* Reverse map containing the string corresponding to a TokenId.
*/
std::unordered_map<TokenId, std::string> tokenIds;
public:
/**
* Constructor of the TokenRegistry class.
*
* @param parser is the underlying parser implementing the ParserCallbacks
* interface to which all calls are relayed.
*/
TokenRegistry(ParserCallbacks &parser) : parser(parser) {}
/* No copy construction */
TokenRegistry(const TokenRegistry &) = delete;
/* No assignment */
TokenRegistry &operator=(const TokenRegistry &) = delete;
TokenId registerToken(const std::string &token) override;
void unregisterToken(TokenId id) override;
};
}
}
#endif /* _OUSIA_PARSER_STACK_TOKEN_REGISTRY_HPP_ */
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