mapnik/include/query.hpp

/*****************************************************************************
 * 
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2006 Artem Pavlenko
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/

//$Id$

#ifndef QUERY_HPP
#define QUERY_HPP

#include <set>
#include <limits>
#include "filter.hpp"
#include "envelope.hpp"
#include "feature.hpp"

namespace mapnik
{
    class query 
    {
    private:
        Envelope<double> bbox_;
        filter<Feature>* filter_;
        std::set<std::string> names_;
    public:
        query() 
            : bbox_(std::numeric_limits<double>::min(),
                    std::numeric_limits<double>::min(),
                    std::numeric_limits<double>::max(),
                    std::numeric_limits<double>::max()),
              filter_(new all_filter<Feature>)
        {}
        
        query(const Envelope<double>& bbox)
            : bbox_(bbox),
              filter_(new all_filter<Feature>)
        {}
	
        query(const Envelope<double>& bbox, const filter<Feature>& f)
            : bbox_(bbox),
              filter_(f.clone())
        {}
	
        query(const query& other)
            : bbox_(other.bbox_),
              filter_(other.filter_->clone())
        {}
        
        query& operator=(const query& other)
        {
            filter<Feature>* tmp=other.filter_->clone();
            delete filter_;
            filter_=tmp;
            bbox_=other.bbox_;
            names_=other.names_;
            return *this;
        }
	
        const filter<Feature>* get_filter() const
        {
            return  filter_;
        }
	
        const Envelope<double>& get_bbox() const
        {
            return bbox_;
        }

        void set_filter(const filter<Feature>& f)
        {
            filter<Feature>* tmp=f.clone();
            delete filter_;
            filter_=tmp;
        }
        
        void add_property_name(const std::string& name)
        {
            names_.insert(name);
        } 
	
        const std::set<std::string>& property_names() const
        {
            return names_;
        }
	
        ~query() 
        {
            delete filter_;
        }
    };
}


#endif //QUERY_HPP