145 lines
3 KiB
C++
145 lines
3 KiB
C++
/* This file is part of Mapnik (c++ mapping toolkit)
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* Copyright (C) 2005 Artem Pavlenko
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*
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* Mapnik is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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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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//$Id: logical.hh 11 2005-03-16 19:46:18Z artem $
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#ifndef LOGICAL_HH
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#define LOGICAL_HH
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#include "filter.hh"
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#include "feature.hh"
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namespace mapnik
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{
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template <typename Feature>
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struct logical_and : public filter<Feature>
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{
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logical_and(const filter<Feature>& filter1,const filter<Feature>& filter2)
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: filter1_(filter1.clone()),
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filter2_(filter2.clone()) {}
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int type() const
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{
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return filter<Feature>::LOGICAL_OPS;
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}
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bool pass(const Feature& feature) const
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{
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return (filter1_->pass(feature) &&
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filter2_->pass(feature));
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}
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filter<Feature>* clone() const
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{
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return new logical_and(*filter1_,*filter2_);
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}
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void accept(filter_visitor<Feature>& v)
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{
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filter1_->accept(v);
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filter2_->accept(v);
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v.visit(*this);
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}
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virtual ~logical_and()
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{
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delete filter1_;
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delete filter2_;
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}
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private:
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filter<Feature>* filter1_;
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filter<Feature>* filter2_;
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};
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template <typename Feature>
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struct logical_or : public filter<Feature>
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{
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logical_or(const filter<Feature>& filter1,const filter<Feature>& filter2)
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: filter1_(filter1.clone()),
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filter2_(filter2.clone()) {}
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int type() const
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{
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return filter<Feature>::LOGICAL_OPS;
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}
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bool pass(const Feature& feature) const
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{
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return (filter1_->pass(feature) ||
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filter2_->pass(feature));
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}
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filter<Feature>* clone() const
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{
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return new logical_or(*filter1_,*filter2_);
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}
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void accept(filter_visitor<Feature>& v)
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{
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filter1_->accept(v);
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filter2_->accept(v);
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v.visit(*this);
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}
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virtual ~logical_or()
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{
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delete filter1_;
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delete filter2_;
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}
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private:
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filter<Feature>* filter1_;
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filter<Feature>* filter2_;
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};
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template <typename Feature>
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struct logical_not : public filter<Feature>
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{
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logical_not(const filter<Feature>& filter)
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: filter_(filter.clone()) {}
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int type() const
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{
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return filter<Feature>::LOGICAL_OPS;
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}
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bool pass(const Feature& feature) const
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{
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return !(filter_->pass(feature));
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}
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filter<Feature>* clone() const
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{
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return new logical_not(*filter_);
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}
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void accept(filter_visitor<Feature>& v)
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{
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filter_->accept(v);
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v.visit(*this);
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}
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~logical_not()
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{
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delete filter_;
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}
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private:
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filter<Feature>* filter_;
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};
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}
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#endif //LOGICAL_HH
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