File: TaggedLineString.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: simplify/TaggedLineString.java rev. 1.2 (JTS-1.7.1)
 *
 **********************************************************************
 *
 * NOTES: This class can be optimized to work with vector<Coordinate*>
 *        rather then with CoordinateSequence. Also, LineSegment should
 *        be replaced with a class not copying Coordinates.
 *
 **********************************************************************/

#ifndef GEOS_SIMPLIFY_TAGGEDLINESTRING_H
#define GEOS_SIMPLIFY_TAGGEDLINESTRING_H

#include <geos/export.h>
#include <vector>
#include <memory>
#include <cstddef>

#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif

// Forward declarations
namespace geos {
	namespace geom {
		class Coordinate;
		class CoordinateSequence;
		class Geometry;
		class LineString;
		class LinearRing;
	}
	namespace simplify {
		class TaggedLineSegment;
	}
}

namespace geos {
namespace simplify { // geos::simplify

using namespace std;

/** \brief
 *
 * Contains and owns a list of TaggedLineSegments
 *
 */
class GEOS_DLL TaggedLineString {

public:

	typedef std::vector<geom::Coordinate> CoordVect;
	
	typedef std::auto_ptr<CoordVect> CoordVectPtr;

	typedef geom::CoordinateSequence CoordSeq;

	typedef std::auto_ptr<geom::CoordinateSequence> CoordSeqPtr;

	TaggedLineString(const geom::LineString* nParentLine,
			std::size_t minimumSize=2);

	~TaggedLineString();

	std::size_t getMinimumSize() const;

	const geom::LineString* getParent() const;

	const CoordSeq* getParentCoordinates() const;

	CoordSeqPtr getResultCoordinates() const;

	std::size_t getResultSize() const;

	TaggedLineSegment* getSegment(std::size_t i);

	const TaggedLineSegment* getSegment(std::size_t i) const;

	std::vector<TaggedLineSegment*>& getSegments();

	const std::vector<TaggedLineSegment*>& getSegments() const;

	void addToResult(std::auto_ptr<TaggedLineSegment> seg);

	std::auto_ptr<geom::Geometry> asLineString() const;

	std::auto_ptr<geom::Geometry> asLinearRing() const;

private:

	const geom::LineString* parentLine;

	// TaggedLineSegments owned by this object
	std::vector<TaggedLineSegment*> segs;

	// TaggedLineSegments owned by this object
	std::vector<TaggedLineSegment*> resultSegs;

	std::size_t minimumSize;

	void init();

	static CoordVectPtr extractCoordinates(
			const std::vector<TaggedLineSegment*>& segs);

	// Copying is turned off
	TaggedLineString(const TaggedLineString&);
	TaggedLineString& operator= (const TaggedLineString&);

};

} // namespace geos::simplify
} // namespace geos

#ifdef _MSC_VER
#pragma warning(pop)
#endif

#endif // GEOS_SIMPLIFY_TAGGEDLINESTRING_H