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116 lines
2.7 KiB
116 lines
2.7 KiB
/*
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* This file is part of the program ltl2dstar (http://www.ltl2dstar.de/).
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* Copyright (C) 2005-2007 Joachim Klein <j.klein@ltl2dstar.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef STATEMAPPER_HPP
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#define STATEMAPPER_HPP
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#include "common/hash_map.hpp"
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#include "common/HashFunction.hpp"
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/** @file
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* Provides StateMapper
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*/
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/** A mapper from KeyType to StateType, ResultType can be used as an alternative key type. */
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template <typename ResultType,
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typename KeyType,
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typename StateType>
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class StateMapper {
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public:
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/** Constructor. */
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StateMapper() :_count(0) {}
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/** Constructor. */
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~StateMapper() {}
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/** Clear the mapping */
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void clear() {
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_map.clear();
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_count=0;
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}
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/** Add a mapping.
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* @param key the key
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* @param state the state
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*/
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StateType* add(const KeyType& key, StateType* state) {
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_map[key]=state;
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++_count;
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return state;
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}
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/** Find a mapping.
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* @param key the key
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* @return the state (or the NULL pointer if not found)
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*/
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StateType* find(const KeyType& key) const {
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typename map_type::const_iterator it;
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it=_map.find(key);
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if (it == _map.end()) {
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return 0;
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} else {
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return (*it).second;
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}
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}
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/** Find a mapping using ResultType.
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* @param result
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* @return the state (or the NULL pointer if not found)
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*/
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StateType* find(const ResultType& result) const {
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return find(result->getState());
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}
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/** Get number of mappings.
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* @return the number of mappings
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*/
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unsigned int size() {
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return _count;
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}
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private:
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/** A functor using the standard hash function on std::shared_ptr */
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template <typename K >
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struct std_hash {
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size_t operator()(const K& x) const {
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#ifdef BADHASH
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return 1;
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#else
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StdHashFunction hash;
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x->hashCode(hash);
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return hash.value();
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#endif
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}
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};
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/** The type of a hash map from StateType to MappedStateType */
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typedef myHashMap<KeyType,
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StateType*,
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std_hash<KeyType>,
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PtrComparator<KeyType> > map_type;
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/** The hash map from StateType to MappedStateType */
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map_type _map;
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/** The number of mappings */
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unsigned int _count;
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};
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#endif
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