172 lines
3.9 KiB
C++
172 lines
3.9 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2006 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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//$Id$
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#ifndef LOGICAL_HPP
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#define LOGICAL_HPP
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#include <mapnik/filter.hpp>
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namespace mapnik
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{
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template <typename FeatureT>
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struct logical_and : public filter<FeatureT>
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{
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logical_and(filter<FeatureT> const& filter1,
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filter<FeatureT> const& filter2)
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: filter<FeatureT>(),
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filter1_(filter1.clone()),
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filter2_(filter2.clone()) {}
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logical_and(logical_and const& other)
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: filter<FeatureT>(),
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filter1_(other.filter1_->clone()),
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filter2_(other.filter2_->clone()) {}
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bool pass(const FeatureT& 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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std::string to_string() const
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{
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return "("+filter1_->to_string()+" and "+filter2_->to_string()+")";
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}
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filter<FeatureT>* clone() const
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{
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return new logical_and(*this);
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}
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void accept(filter_visitor<FeatureT>& 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<FeatureT>* filter1_;
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filter<FeatureT>* filter2_;
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};
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template <typename FeatureT>
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struct logical_or : public filter<FeatureT>
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{
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logical_or(const filter<FeatureT>& filter1,const filter<FeatureT>& filter2)
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: filter<FeatureT>(),
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filter1_(filter1.clone()),
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filter2_(filter2.clone()) {}
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logical_or(logical_or const& other)
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: filter<FeatureT>(),
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filter1_(other.filter1_->clone()),
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filter2_(other.filter2_->clone()) {}
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bool pass(const FeatureT& feature) const
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{
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if (filter1_->pass(feature))
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{
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return true;
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}
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else
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{
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return filter2_->pass(feature);
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}
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}
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filter<FeatureT>* clone() const
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{
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return new logical_or(*this);
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}
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void accept(filter_visitor<FeatureT>& 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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std::string to_string() const
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{
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return "("+filter1_->to_string()+" or "+filter2_->to_string()+")";
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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<FeatureT>* filter1_;
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filter<FeatureT>* filter2_;
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};
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template <typename FeatureT>
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struct logical_not : public filter<FeatureT>
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{
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logical_not(filter<FeatureT> const& _filter)
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: filter<FeatureT>(),
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filter_(_filter.clone()) {}
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logical_not(logical_not const& other)
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: filter<FeatureT>(),
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filter_(other.filter_->clone()) {}
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int type() const
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{
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return filter<FeatureT>::LOGICAL_OPS;
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}
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bool pass(const FeatureT& feature) const
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{
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return !(filter_->pass(feature));
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}
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filter<FeatureT>* clone() const
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{
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return new logical_not(*this);
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}
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void accept(filter_visitor<FeatureT>& 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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std::string to_string() const
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{
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return "not ("+filter_->to_string()+")";
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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<FeatureT>* filter_;
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};
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}
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#endif //LOGICAL_HPP
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