PermLib
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00001 // --------------------------------------------------------------------------- 00002 // 00003 // This file is part of PermLib. 00004 // 00005 // Copyright (c) 2009-2011 Thomas Rehn <thomas@carmen76.de> 00006 // All rights reserved. 00007 // 00008 // Redistribution and use in source and binary forms, with or without 00009 // modification, are permitted provided that the following conditions 00010 // are met: 00011 // 1. Redistributions of source code must retain the above copyright 00012 // notice, this list of conditions and the following disclaimer. 00013 // 2. Redistributions in binary form must reproduce the above copyright 00014 // notice, this list of conditions and the following disclaimer in the 00015 // documentation and/or other materials provided with the distribution. 00016 // 3. The name of the author may not be used to endorse or promote products 00017 // derived from this software without specific prior written permission. 00018 // 00019 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 00020 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00021 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 00022 // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 00023 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 00024 // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00025 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00026 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00027 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 00028 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00029 // 00030 // --------------------------------------------------------------------------- 00031 00032 00033 #ifndef SETWISESTABILIZERPREDICATE_H_ 00034 #define SETWISESTABILIZERPREDICATE_H_ 00035 00036 #include <permlib/predicate/subgroup_predicate.h> 00037 #include <permlib/search/partition/set_stabilize_refinement.h> 00038 #include <permlib/search/partition/refinement_family.h> 00039 00040 #include <boost/foreach.hpp> 00041 00042 namespace permlib { 00043 00045 template <class PERM> 00046 class SetwiseStabilizerPredicate : public SubgroupPredicate<PERM> { 00047 public: 00049 00053 template<class InputIterator> 00054 SetwiseStabilizerPredicate(InputIterator begin, InputIterator end); 00055 00056 virtual bool operator()(const PERM &p) const; 00057 virtual bool childRestriction(const PERM &h, unsigned int i, unsigned long beta_i) const; 00058 virtual unsigned int limit() const; 00059 private: 00060 //TODO: perhaps use std::set here? 00061 std::vector<unsigned long> m_delta; 00062 }; 00063 00064 // 00065 // ---- IMPLEMENTATION 00066 // 00067 00068 template <class PERM> 00069 template <class InputIterator> 00070 SetwiseStabilizerPredicate<PERM>::SetwiseStabilizerPredicate(InputIterator begin, InputIterator end) 00071 : m_delta(begin, end) 00072 { } 00073 00074 template <class PERM> 00075 bool SetwiseStabilizerPredicate<PERM>::operator()(const PERM &p) const { 00076 BOOST_FOREACH(unsigned long delta_i, m_delta) { 00077 if (std::find(m_delta.begin(), m_delta.end(), p / delta_i) == m_delta.end()) 00078 return false; 00079 } 00080 return true; 00081 } 00082 00083 template <class PERM> 00084 bool SetwiseStabilizerPredicate<PERM>::childRestriction(const PERM &h, unsigned int i, unsigned long beta_i) const { 00085 if (std::find(m_delta.begin(), m_delta.end(), h / beta_i) == m_delta.end()) 00086 return false; 00087 return true; 00088 } 00089 00090 template <class PERM> 00091 unsigned int SetwiseStabilizerPredicate<PERM>::limit() const { 00092 return m_delta.size(); 00093 } 00094 00095 } 00096 00097 #endif // -- SETWISESTABILIZERPREDICATE_H_