WKTWriter.h

/**********************************************************************
 * $Id: WKTWriter.h 2556 2009-06-06 22:22:28Z strk $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * Copyright (C) 2005-2006 Refractions Research Inc.
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************/

#ifndef GEOS_IO_WKTWRITER_H
#define GEOS_IO_WKTWRITER_H

#include <geos/export.h>

#include <string>

// Forward declarations
namespace geos {
        namespace geom {
                class Coordinate;
                class CoordinateSequence;
                class Geometry;
                class GeometryCollection;
                class Point;
                class LineString;
                class LinearRing;
                class Polygon;
                class MultiPoint;
                class MultiLineString;
                class MultiPolygon;
                class PrecisionModel;
        } 
        namespace io {
                class Writer;
        } 
} 


namespace geos {
namespace io {

class GEOS_DLL WKTWriter {
public:
        WKTWriter();
        ~WKTWriter();

        //string(count, ch) can be used for this
        //static string stringOfChar(char ch, int count);

        std::string write(const geom::Geometry *geometry);

        // Send Geometry's WKT to the given Writer
        void write(const geom::Geometry *geometry, Writer *writer);

        std::string writeFormatted(const geom::Geometry *geometry);

        void writeFormatted(const geom::Geometry *geometry, Writer *writer);

        static std::string toLineString(const geom::CoordinateSequence& seq); 

        static std::string toLineString(const geom::Coordinate& p0, const geom::Coordinate& p1);

        static std::string toPoint(const geom::Coordinate& p0);
 

protected:

        std::string formatter;

        void appendGeometryTaggedText(const geom::Geometry *geometry, int level, Writer *writer);

        void appendPointTaggedText(
                        const geom::Coordinate* coordinate,
                        int level, Writer *writer);

        void appendLineStringTaggedText(
                        const geom::LineString *lineString,
                        int level, Writer *writer);

        void appendLinearRingTaggedText(
                        const geom::LinearRing *lineString,
                        int level, Writer *writer);

        void appendPolygonTaggedText(
                        const geom::Polygon *polygon,
                        int level, Writer *writer);

        void appendMultiPointTaggedText(
                        const geom::MultiPoint *multipoint,
                        int level, Writer *writer);

        void appendMultiLineStringTaggedText(
                        const geom::MultiLineString *multiLineString,
                        int level,Writer *writer);

        void appendMultiPolygonTaggedText(
                        const geom::MultiPolygon *multiPolygon,
                        int level, Writer *writer);

        void appendGeometryCollectionTaggedText(
                        const geom::GeometryCollection *geometryCollection,
                        int level,Writer *writer);

        void appendPointText(const geom::Coordinate* coordinate, int level,
                        Writer *writer);

        void appendCoordinate(const geom::Coordinate* coordinate,
                        Writer *writer);

        std::string writeNumber(double d);

        void appendLineStringText(
                        const geom::LineString *lineString,
                        int level, bool doIndent, Writer *writer);

        void appendPolygonText(
                        const geom::Polygon *polygon,
                        int level, bool indentFirst, Writer *writer);

        void appendMultiPointText(
                        const geom::MultiPoint *multiPoint,
                        int level, Writer *writer);

        void appendMultiLineStringText(
                        const geom::MultiLineString *multiLineString,
                        int level, bool indentFirst,Writer *writer);

        void appendMultiPolygonText(
                        const geom::MultiPolygon *multiPolygon,
                        int level, Writer *writer);

        void appendGeometryCollectionText(
                        const geom::GeometryCollection *geometryCollection,
                        int level,Writer *writer);

private:

        enum {
                INDENT = 2
        };

//      static const int INDENT = 2;

        static std::string createFormatter(
                        const geom::PrecisionModel* precisionModel);

        bool isFormatted;

        int level;

        void writeFormatted(
                        const geom::Geometry *geometry,
                        bool isFormatted, Writer *writer);

        void indent(int level, Writer *writer);
};

} // namespace geos::io
} // namespace geos

#endif // #ifndef GEOS_IO_WKTWRITER_H

/**********************************************************************
 * $Log$
 * Revision 1.3  2006/06/12 16:55:53  strk
 * fixed compiler warnings, fixed some methods to omit unused parameters.
 *
 * Revision 1.2  2006/03/22 16:58:35  strk
 * Removed (almost) all inclusions of geom.h.
 * Removed obsoleted .cpp files.
 * Fixed a bug in WKTReader not using the provided CoordinateSequence
 * implementation, optimized out some memory allocations.
 *
 * Revision 1.1  2006/03/20 18:18:15  strk
 * io.h header split
 *
 **********************************************************************/

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