IsValidOp.h

/**********************************************************************
 * $Id: IsValidOp.h 2572 2009-06-08 22:10:55Z 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.
 *
 **********************************************************************
 *
 * Last port: operation/valid/IsValidOp.java rev. 1.41 (JTS-1.10)
 *
 **********************************************************************/

#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;

        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 checkShellNotNested(const geom::LinearRing *shell,
                        const geom::Polygon *p,
                        geomgraph::GeometryGraph *graph);

        const geom::Coordinate *checkShellInsideHole(
                        const geom::LinearRing *shell,
                        const geom::LinearRing *hole,
                        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,
                        geomgraph::GeometryGraph *graph);

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

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

        virtual ~IsValidOp() {
                delete validErr;
        }

        bool isValid();

        TopologyValidationError* getValidationError();

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

};

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

#endif // GEOS_OP_ISVALIDOP_H

/**********************************************************************
 * $Log$
 * Revision 1.2  2006/03/29 13:53:59  strk
 * EdgeRing equipped with Invariant testing function and lots of exceptional assertions. Removed useless heap allocations, and pointers usages.
 *
 * Revision 1.1  2006/03/20 16:57:44  strk
 * spatialindex.h and opValid.h headers split
 *
 **********************************************************************/

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