IsValidOp.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2010 Sandro Santilli <strk@keybit.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 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 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);

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