120 lines
4.3 KiB
C++
120 lines
4.3 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: postgis.hpp 44 2005-04-22 18:53:54Z pavlenko $
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#ifndef POSTGIS_HPP
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#define POSTGIS_HPP
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#include <mapnik/datasource.hpp>
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#include <mapnik/envelope.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/feature_layer_desc.hpp>
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#include <boost/lexical_cast.hpp>
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#include <boost/scoped_ptr.hpp>
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#include <set>
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#include "connection_manager.hpp"
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#include "resultset.hpp"
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#include "cursorresultset.hpp"
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using mapnik::transcoder;
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using mapnik::datasource;
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using mapnik::Envelope;
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using mapnik::layer_descriptor;
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using mapnik::featureset_ptr;
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using mapnik::feature_ptr;
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using mapnik::query;
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using mapnik::parameters;
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using mapnik::coord2d;
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//class transcoder;
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class postgis_datasource : public datasource
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{
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static const std::string GEOMETRY_COLUMNS;
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static const std::string SPATIAL_REF_SYS;
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const std::string uri_;
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const std::string username_;
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const std::string password_;
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const std::string table_;
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mutable std::string schema_;
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mutable std::string geometry_table_;
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const std::string geometry_field_;
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const int cursor_fetch_size_;
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const int row_limit_;
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mutable std::string geometryColumn_;
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int type_;
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int srid_;
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mutable bool extent_initialized_;
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mutable mapnik::Envelope<double> extent_;
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layer_descriptor desc_;
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ConnectionCreator<Connection> creator_;
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bool multiple_geometries_;
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static const std::string name_;
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const std::string bbox_token_;
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const std::string scale_denom_token_;
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bool persist_connection_;
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bool extent_from_subquery_;
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//bool show_queries_;
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public:
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static std::string name();
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int type() const;
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featureset_ptr features(const query& q) const;
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featureset_ptr features_at_point(coord2d const& pt) const;
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mapnik::Envelope<double> envelope() const;
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layer_descriptor get_descriptor() const;
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postgis_datasource(const parameters ¶ms);
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~postgis_datasource();
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private:
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std::string sql_bbox(Envelope<double> const& env) const;
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std::string populate_tokens(const std::string& sql, double const& scale_denom, Envelope<double> const& env) const;
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std::string populate_tokens(const std::string& sql) const;
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static std::string unquote(const std::string& sql);
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static std::string table_from_sql(const std::string& sql);
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boost::shared_ptr<IResultSet> get_resultset(boost::shared_ptr<Connection> const &conn, const std::string &sql) const;
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postgis_datasource(const postgis_datasource&);
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postgis_datasource& operator=(const postgis_datasource&);
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};
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class postgis_featureset : public mapnik::Featureset
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{
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private:
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boost::shared_ptr<IResultSet> rs_;
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bool multiple_geometries_;
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unsigned num_attrs_;
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boost::scoped_ptr<mapnik::transcoder> tr_;
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mutable int totalGeomSize_;
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mutable int count_;
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public:
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postgis_featureset(boost::shared_ptr<IResultSet> const& rs,
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std::string const& encoding,
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bool multiple_geometries,
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unsigned num_attrs);
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feature_ptr next();
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~postgis_featureset();
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private:
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postgis_featureset(const postgis_featureset&);
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const postgis_featureset& operator=(const postgis_featureset&);
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};
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#endif //POSTGIS_HPP
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