81 lines
2 KiB
C++
81 lines
2 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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//$Id$
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#ifndef REGEX_FILTER_HPP
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#define REGEX_FILTER_HPP
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#include "filter.hpp"
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#include "expression.hpp"
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#include <boost/regex.hpp>
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#include <boost/algorithm/string.hpp>
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namespace mapnik
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{
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template <typename FeatureT>
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struct regex_filter : public filter<FeatureT>
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{
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regex_filter(expression<FeatureT> const& exp,
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std::string const& pattern)
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: filter<FeatureT>(),
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exp_(exp.clone()),
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pattern_(pattern) {}
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regex_filter(regex_filter const& other)
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: filter<FeatureT>(),
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exp_(other.exp_->clone()),
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pattern_(other.pattern_) {}
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bool pass(FeatureT const& feature) const
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{
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std::string text=exp_->get_value(feature).to_string();
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boost::trim_if(text,is_any_of("'"));
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return boost::regex_match(text,pattern_);
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}
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void accept(filter_visitor<FeatureT>& v)
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{
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exp_->accept(v);
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v.visit(*this);
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}
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filter<FeatureT>* clone() const
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{
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return new regex_filter(*this);
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}
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std::string to_string() const
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{
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return exp_->to_string()+".match("+pattern_.str()+")";
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}
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~regex_filter()
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{
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delete exp_;
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}
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private:
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expression<FeatureT>* exp_;
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boost::regex pattern_;
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};
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}
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#endif //REGEX_FILTER_HPP
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