IsValidOp.h

Go to the documentation of this file.

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2010 Sandro Santilli <strk@kbt.io>
 * 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.
 *
 **********************************************************************
 *
 * Last port: operation/valid/IsValidOp.java r335 (JTS-1.12)
 *
 **********************************************************************/

#ifndef GEOS_OP_ISVALIDOP_H
#define GEOS_OP_ISVALIDOP_H

#include <geos/export.h>

#include <geos/operation/valid/TopologyValidationError.h> // for inlined destructor

// Forward declarations
namespace geos {
namespace util {
class TopologyValidationError;
}
namespace geom {
class CoordinateSequence;
class GeometryFactory;
class Geometry;
class Point;
class LinearRing;
class LineString;
class Polygon;
class GeometryCollection;
class MultiPolygon;
class MultiLineString;
}
namespace geomgraph {
class DirectedEdge;
class EdgeIntersectionList;
class PlanarGraph;
class GeometryGraph;
}
}

namespace geos {
namespace operation { // geos::operation
namespace valid { // geos::operation::valid

class GEOS_DLL IsValidOp {
    friend class Unload;
private:
    const geom::Geometry* parentGeometry;

    bool isChecked;

    // CHECKME: should this really be a pointer ?
    TopologyValidationError* validErr;

    // This is the version using 'isChecked' flag
    void checkValid();

    void checkValid(const geom::Geometry* g);
    void checkValid(const geom::Point* g);
    void checkValid(const geom::LinearRing* g);
    void checkValid(const geom::LineString* g);
    void checkValid(const geom::Polygon* g);
    void checkValid(const geom::MultiPolygon* g);
    void checkValid(const geom::GeometryCollection* gc);
    void checkConsistentArea(geomgraph::GeometryGraph* graph);


    void checkNoSelfIntersectingRings(geomgraph::GeometryGraph* graph);

    void checkNoSelfIntersectingRing(
        geomgraph::EdgeIntersectionList& eiList);

    void checkTooFewPoints(geomgraph::GeometryGraph* graph);

    void checkHolesInShell(const geom::Polygon* p,
                           geomgraph::GeometryGraph* graph);

    void checkHolesNotNested(const geom::Polygon* p,
                             geomgraph::GeometryGraph* graph);

    void checkShellsNotNested(const geom::MultiPolygon* mp,
                              geomgraph::GeometryGraph* graph);


    void checkConnectedInteriors(geomgraph::GeometryGraph& graph);

    void checkInvalidCoordinates(const geom::CoordinateSequence* cs);

    void checkInvalidCoordinates(const geom::Polygon* poly);

    void checkClosedRings(const geom::Polygon* poly);

    void checkClosedRing(const geom::LinearRing* ring);

    bool isSelfTouchingRingFormingHoleValid;

public:
    static const geom::Coordinate* findPtNotNode(
        const geom::CoordinateSequence* testCoords,
        const geom::LinearRing* searchRing,
        const geomgraph::GeometryGraph* graph);

    static bool isValid(const geom::Coordinate& coord);

    static bool isValid(const geom::Geometry& geom);

    IsValidOp(const geom::Geometry* geom)
        :
        parentGeometry(geom),
        isChecked(false),
        validErr(nullptr),
        isSelfTouchingRingFormingHoleValid(false)
    {}

    virtual
    ~IsValidOp()
    {
        delete validErr;
    }

    bool isValid();

    TopologyValidationError* getValidationError();

    void
    setSelfTouchingRingFormingHoleValid(bool p_isValid)
    {
        isSelfTouchingRingFormingHoleValid = p_isValid;
    }

};

} // namespace geos.operation.valid
} // namespace geos.operation
} // namespace geos

#endif // GEOS_OP_ISVALIDOP_H