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531 lines
18 KiB
C++
531 lines
18 KiB
C++
/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
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* Copyright (C) 2006 Refractions Research Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************
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*
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* Last port: geom/GeometryFactory.java r320 (JTS-1.12)
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*
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**********************************************************************/
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#ifndef GEOS_GEOM_GEOMETRYFACTORY_H
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#define GEOS_GEOM_GEOMETRYFACTORY_H
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#include <geos/geom/Geometry.h>
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#include <geos/geom/GeometryCollection.h>
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#include <geos/geom/MultiPoint.h>
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#include <geos/geom/MultiLineString.h>
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#include <geos/geom/MultiPolygon.h>
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#include <geos/geom/PrecisionModel.h>
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#include <geos/export.h>
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#include <geos/inline.h>
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#include <geos/util.h>
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#include <vector>
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#include <memory>
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#include <cassert>
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#include <geos/util/IllegalArgumentException.h>
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namespace geos {
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namespace geom {
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class CoordinateSequenceFactory;
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class Coordinate;
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class CoordinateSequence;
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class Envelope;
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class Geometry;
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class GeometryCollection;
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class LineString;
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class LinearRing;
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class MultiLineString;
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class MultiPoint;
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class MultiPolygon;
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class Polygon;
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}
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}
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namespace geos {
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namespace geom { // geos::geom
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/**
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* \brief
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* Supplies a set of utility methods for building Geometry objects
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* from CoordinateSequence or other Geometry objects.
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*
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* Note that the factory constructor methods do <b>not</b> change the input
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* coordinates in any way.
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* In particular, they are not rounded to the supplied <tt>PrecisionModel</tt>.
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* It is assumed that input Coordinates meet the given precision.
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*/
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class GEOS_DLL GeometryFactory {
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private:
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struct GeometryFactoryDeleter {
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void
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operator()(GeometryFactory* p) const
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{
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p->destroy();
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}
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};
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public:
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using Ptr = std::unique_ptr<GeometryFactory, GeometryFactoryDeleter>;
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/**
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* \brief
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* Constructs a GeometryFactory that generates Geometries having a
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* floating PrecisionModel and a spatial-reference ID of 0.
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*/
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static GeometryFactory::Ptr create();
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/**
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* \brief
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* Constructs a GeometryFactory that generates Geometries having
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* the given PrecisionModel, spatial-reference ID, and
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* CoordinateSequence implementation.
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*
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* NOTES:
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* (1) the given PrecisionModel is COPIED
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* (2) the CoordinateSequenceFactory is NOT COPIED
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* and must be available for the whole lifetime
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* of the GeometryFactory
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*/
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static GeometryFactory::Ptr create(const PrecisionModel* pm, int newSRID,
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CoordinateSequenceFactory* nCoordinateSequenceFactory);
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/**
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* \brief
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* Constructs a GeometryFactory that generates Geometries having the
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* given CoordinateSequence implementation, a double-precision floating
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* PrecisionModel and a spatial-reference ID of 0.
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*/
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static GeometryFactory::Ptr create(CoordinateSequenceFactory* nCoordinateSequenceFactory);
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/**
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* \brief
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* Constructs a GeometryFactory that generates Geometries having
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* the given PrecisionModel and the default CoordinateSequence
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* implementation.
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*
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* @param pm the PrecisionModel to use
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*/
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static GeometryFactory::Ptr create(const PrecisionModel* pm);
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/**
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* \brief
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* Constructs a GeometryFactory that generates Geometries having
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* the given {@link PrecisionModel} and spatial-reference ID,
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* and the default CoordinateSequence implementation.
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*
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* @param pm the PrecisionModel to use, will be copied internally
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* @param newSRID the SRID to use
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*/
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static GeometryFactory::Ptr create(const PrecisionModel* pm, int newSRID);
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/**
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* \brief Copy constructor
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*
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* @param gf the GeometryFactory to clone from
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*/
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static GeometryFactory::Ptr create(const GeometryFactory& gf);
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/**
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* \brief
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* Return a pointer to the default GeometryFactory.
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* This is a global shared object instantiated
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* using default constructor.
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*/
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static const GeometryFactory*
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getDefaultInstance();
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//Skipped a lot of list to array convertors
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Point* createPointFromInternalCoord(const Coordinate* coord,
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const Geometry* exemplar) const;
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/// Converts an Envelope to a Geometry.
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///
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/// Returned Geometry can be a Point, a Polygon or an EMPTY geom.
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///
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std::unique_ptr<Geometry> toGeometry(const Envelope* envelope) const;
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/// \brief
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/// Returns the PrecisionModel that Geometries created by this
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/// factory will be associated with.
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const PrecisionModel* getPrecisionModel() const;
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/// Creates an EMPTY Point
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std::unique_ptr<Point> createPoint(std::size_t coordinateDimension = 2) const;
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/// Creates a Point using the given Coordinate
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Point* createPoint(const Coordinate& coordinate) const;
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/// Creates a Point taking ownership of the given CoordinateSequence
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Point* createPoint(CoordinateSequence* coordinates) const;
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/// Creates a Point with a deep-copy of the given CoordinateSequence.
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Point* createPoint(const CoordinateSequence& coordinates) const;
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/// Construct an EMPTY GeometryCollection
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std::unique_ptr<GeometryCollection> createGeometryCollection() const;
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/// Construct the EMPTY Geometry
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std::unique_ptr<Geometry> createEmptyGeometry() const;
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/// Construct a GeometryCollection taking ownership of given arguments
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GeometryCollection* createGeometryCollection(
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std::vector<Geometry*>* newGeoms) const;
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template<typename T>
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std::unique_ptr<GeometryCollection> createGeometryCollection(
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std::vector<std::unique_ptr<T>> && newGeoms) const {
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// Can't use make_unique because constructor is protected
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return std::unique_ptr<GeometryCollection>(new GeometryCollection(Geometry::toGeometryArray(std::move(newGeoms)), *this));
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}
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/// Constructs a GeometryCollection with a deep-copy of args
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GeometryCollection* createGeometryCollection(
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const std::vector<const Geometry*>& newGeoms) const;
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/// Construct an EMPTY MultiLineString
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std::unique_ptr<MultiLineString> createMultiLineString() const;
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/// Construct a MultiLineString taking ownership of given arguments
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MultiLineString* createMultiLineString(
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std::vector<Geometry*>* newLines) const;
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/// Construct a MultiLineString with a deep-copy of given arguments
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MultiLineString* createMultiLineString(
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const std::vector<const Geometry*>& fromLines) const;
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std::unique_ptr<MultiLineString> createMultiLineString(
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std::vector<std::unique_ptr<LineString>> && fromLines) const;
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std::unique_ptr<MultiLineString> createMultiLineString(
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std::vector<std::unique_ptr<Geometry>> && fromLines) const;
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/// Construct an EMPTY MultiPolygon
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std::unique_ptr<MultiPolygon> createMultiPolygon() const;
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/// Construct a MultiPolygon taking ownership of given arguments
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MultiPolygon* createMultiPolygon(std::vector<Geometry*>* newPolys) const;
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/// Construct a MultiPolygon with a deep-copy of given arguments
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MultiPolygon* createMultiPolygon(
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const std::vector<const Geometry*>& fromPolys) const;
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std::unique_ptr<MultiPolygon> createMultiPolygon(
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std::vector<std::unique_ptr<Polygon>> && fromPolys) const;
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std::unique_ptr<MultiPolygon> createMultiPolygon(
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std::vector<std::unique_ptr<Geometry>> && fromPolys) const;
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/// Construct an EMPTY LinearRing
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std::unique_ptr<LinearRing> createLinearRing() const;
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/// Construct a LinearRing taking ownership of given arguments
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LinearRing* createLinearRing(CoordinateSequence* newCoords) const;
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std::unique_ptr<LinearRing> createLinearRing(
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std::unique_ptr<CoordinateSequence> && newCoords) const;
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/// Construct a LinearRing with a deep-copy of given arguments
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LinearRing* createLinearRing(
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const CoordinateSequence& coordinates) const;
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/// Constructs an EMPTY <code>MultiPoint</code>.
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std::unique_ptr<MultiPoint> createMultiPoint() const;
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/// Construct a MultiPoint taking ownership of given arguments
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MultiPoint* createMultiPoint(std::vector<Geometry*>* newPoints) const;
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std::unique_ptr<MultiPoint> createMultiPoint(std::vector<std::unique_ptr<Point>> && newPoints) const;
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std::unique_ptr<MultiPoint> createMultiPoint(std::vector<std::unique_ptr<Geometry>> && newPoints) const;
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/// Construct a MultiPoint with a deep-copy of given arguments
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MultiPoint* createMultiPoint(
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const std::vector<const Geometry*>& fromPoints) const;
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/// \brief
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/// Construct a MultiPoint containing a Point geometry
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/// for each Coordinate in the given list.
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MultiPoint* createMultiPoint(
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const CoordinateSequence& fromCoords) const;
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/// \brief
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/// Construct a MultiPoint containing a Point geometry
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/// for each Coordinate in the given vector.
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MultiPoint* createMultiPoint(
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const std::vector<Coordinate>& fromCoords) const;
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/// Construct an EMPTY Polygon
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std::unique_ptr<Polygon> createPolygon(std::size_t coordinateDimension = 2) const;
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/// Construct a Polygon taking ownership of given arguments
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Polygon* createPolygon(LinearRing* shell,
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std::vector<LinearRing*>* holes) const;
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std::unique_ptr<Polygon> createPolygon(std::unique_ptr<LinearRing> && shell) const;
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std::unique_ptr<Polygon> createPolygon(std::unique_ptr<LinearRing> && shell,
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std::vector<std::unique_ptr<LinearRing>> && holes) const;
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/// Construct a Polygon with a deep-copy of given arguments
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Polygon* createPolygon(const LinearRing& shell,
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const std::vector<LinearRing*>& holes) const;
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/// Construct an EMPTY LineString
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std::unique_ptr<LineString> createLineString(std::size_t coordinateDimension = 2) const;
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/// Copy a LineString
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std::unique_ptr<LineString> createLineString(const LineString& ls) const;
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/// Construct a LineString taking ownership of given argument
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LineString* createLineString(CoordinateSequence* coordinates) const;
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std::unique_ptr<LineString> createLineString(
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std::unique_ptr<CoordinateSequence> && coordinates) const;
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/// Construct a LineString with a deep-copy of given argument
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LineString* createLineString(
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const CoordinateSequence& coordinates) const;
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/**
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* Creates an empty atomic geometry of the given dimension.
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* If passed a dimension of -1 will create an empty {@link GeometryCollection}.
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*
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* @param dimension the required dimension (-1, 0, 1 or 2)
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* @return an empty atomic geometry of given dimension
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*/
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std::unique_ptr<Geometry> createEmpty(int dimension) const;
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/**
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* Build an appropriate <code>Geometry</code>, <code>MultiGeometry</code>, or
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* <code>GeometryCollection</code> to contain the <code>Geometry</code>s in
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* it.
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*
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* For example:
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*
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* - If <code>geomList</code> contains a single <code>Polygon</code>,
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* the <code>Polygon</code> is returned.
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* - If <code>geomList</code> contains several <code>Polygon</code>s, a
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* <code>MultiPolygon</code> is returned.
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* - If <code>geomList</code> contains some <code>Polygon</code>s and
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* some <code>LineString</code>s, a <code>GeometryCollection</code> is
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* returned.
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* - If <code>geomList</code> is empty, an empty
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* <code>GeometryCollection</code> is returned
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* .
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*
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* Note that this method does not "flatten" Geometries in the input,
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* and hence if any MultiGeometries are contained in the input a
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* GeometryCollection containing them will be returned.
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*
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* @param geoms the <code>Geometry</code>s to combine
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*
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* @return A <code>Geometry</code> of the "smallest", "most type-specific"
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* class that can contain the elements of <code>geomList</code>.
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*
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* NOTE: the returned Geometry will take ownership of the
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* given vector AND its elements
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*/
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Geometry* buildGeometry(std::vector<Geometry*>* geoms) const;
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std::unique_ptr<Geometry> buildGeometry(std::vector<std::unique_ptr<Geometry>> && geoms) const;
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std::unique_ptr<Geometry> buildGeometry(std::vector<std::unique_ptr<Point>> && geoms) const;
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std::unique_ptr<Geometry> buildGeometry(std::vector<std::unique_ptr<LineString>> && geoms) const;
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std::unique_ptr<Geometry> buildGeometry(std::vector<std::unique_ptr<Polygon>> && geoms) const;
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/// See buildGeometry(std::vector<Geometry *>&) for semantics
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//
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/// Will clone the geometries accessible trough the iterator.
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///
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/// @tparam T an iterator yelding something which casts to const Geometry*
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/// @param from start iterator
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/// @param toofar end iterator
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///
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template <class T>
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std::unique_ptr<Geometry>
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buildGeometry(T from, T toofar) const
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{
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bool isHeterogeneous = false;
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size_t count = 0;
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int geomClass = -1;
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for(T i = from; i != toofar; ++i) {
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++count;
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const Geometry* g = *i;
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if(geomClass < 0) {
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geomClass = g->getSortIndex();
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}
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else if(geomClass != g->getSortIndex()) {
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isHeterogeneous = true;
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}
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}
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// for the empty geometry, return an empty GeometryCollection
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if(count == 0) {
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return std::unique_ptr<Geometry>(createGeometryCollection());
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}
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// for the single geometry, return a clone
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if(count == 1) {
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return (*from)->clone();
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}
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// Now we know it is a collection
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// FIXME:
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// Until we tweak all the createMulti* interfaces
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// to support taking iterators we'll have to build
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// a custom vector here.
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std::vector<std::unique_ptr<Geometry>> fromGeoms;
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for(T i = from; i != toofar; ++i) {
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fromGeoms.push_back((*i)->clone());
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}
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// for an heterogeneous ...
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if(isHeterogeneous) {
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return createGeometryCollection(std::move(fromGeoms));
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}
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// At this point we know the collection is not hetereogenous.
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switch((*from)->getDimension()) {
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case Dimension::A: return createMultiPolygon(std::move(fromGeoms));
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case Dimension::L: return createMultiLineString(std::move(fromGeoms));
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case Dimension::P: return createMultiPoint(std::move(fromGeoms));
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default:
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throw geos::util::IllegalArgumentException(std::string("Invalid geometry type."));
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}
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}
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/** \brief
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* This function does the same thing of the omonimouse function
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* taking vector pointer instead of reference.
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*
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* The difference is that this version will copy needed data
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* leaving ownership to the caller.
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*/
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Geometry* buildGeometry(const std::vector<const Geometry*>& geoms) const;
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int getSRID() const;
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/// \brief
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/// Returns the CoordinateSequenceFactory associated
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/// with this GeometryFactory
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const CoordinateSequenceFactory* getCoordinateSequenceFactory() const;
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/// Returns a clone of given Geometry.
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Geometry* createGeometry(const Geometry* g) const;
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/// Destroy a Geometry, or release it
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void destroyGeometry(Geometry* g) const;
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/// Request that the instance is deleted.
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///
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/// It will really be deleted only after last child Geometry is
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/// deleted. Do not use the instance anymore after calling this function
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/// (unless you're a live child!).
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///
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void destroy();
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protected:
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/**
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* \brief
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|
* Constructs a GeometryFactory that generates Geometries having a
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* floating PrecisionModel and a spatial-reference ID of 0.
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*/
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GeometryFactory();
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|
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/**
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* \brief
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|
* Constructs a GeometryFactory that generates Geometries having
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|
* the given PrecisionModel, spatial-reference ID, and
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|
* CoordinateSequence implementation.
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|
*
|
|
* NOTES:
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* (1) the given PrecisionModel is COPIED
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|
* (2) the CoordinateSequenceFactory is NOT COPIED
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|
* and must be available for the whole lifetime
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|
* of the GeometryFactory
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|
*/
|
|
GeometryFactory(const PrecisionModel* pm, int newSRID,
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CoordinateSequenceFactory* nCoordinateSequenceFactory);
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|
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/**
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* \brief
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|
* Constructs a GeometryFactory that generates Geometries having the
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* given CoordinateSequence implementation, a double-precision floating
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|
* PrecisionModel and a spatial-reference ID of 0.
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*/
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GeometryFactory(CoordinateSequenceFactory* nCoordinateSequenceFactory);
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|
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/**
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* \brief
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|
* Constructs a GeometryFactory that generates Geometries having
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* the given PrecisionModel and the default CoordinateSequence
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|
* implementation.
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|
*
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* @param pm the PrecisionModel to use
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|
*/
|
|
GeometryFactory(const PrecisionModel* pm);
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|
|
|
/**
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|
* \brief
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|
* Constructs a GeometryFactory that generates Geometries having
|
|
* the given {@link PrecisionModel} and spatial-reference ID,
|
|
* and the default CoordinateSequence implementation.
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|
*
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* @param pm the PrecisionModel to use, will be copied internally
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* @param newSRID the SRID to use
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*/
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GeometryFactory(const PrecisionModel* pm, int newSRID);
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/**
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* \brief Copy constructor
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*
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* @param gf the GeometryFactory to clone from
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*/
|
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GeometryFactory(const GeometryFactory& gf);
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|
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/// Destructor
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virtual ~GeometryFactory();
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private:
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PrecisionModel precisionModel;
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int SRID;
|
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const CoordinateSequenceFactory* coordinateListFactory;
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mutable int _refCount;
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bool _autoDestroy;
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friend class Geometry;
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void addRef() const;
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void dropRef() const;
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};
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} // namespace geos::geom
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} // namespace geos
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#ifdef GEOS_INLINE
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# include "geos/geom/GeometryFactory.inl"
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#endif
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#endif // ndef GEOS_GEOM_GEOMETRYFACTORY_H
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