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# GeometryFactory.h

    00001 /**********************************************************************
    00002  * $Id: GeometryFactory.h 3471 2011-09-20 14:34:57Z strk $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2011 Sandro Santilli <strk@keybit.net>
    00008  * Copyright (C) 2006 Refractions Research Inc.
    00009  *
    00010  * This is free software; you can redistribute and/or modify it under
    00011  * the terms of the GNU Lesser General Public Licence as published
    00012  * by the Free Software Foundation.
    00013  * See the COPYING file for more information.
    00014  *
    00015  **********************************************************************
    00016  *
    00017  * Last port: geom/GeometryFactory.java r320 (JTS-1.12)
    00018  *
    00019  **********************************************************************/
    00020
    00021 #ifndef GEOS_GEOM_GEOMETRYFACTORY_H
    00022 #define GEOS_GEOM_GEOMETRYFACTORY_H
    00023
    00024 #include <geos/geom/Geometry.h>
    00025 #include <geos/geom/GeometryCollection.h>
    00026 #include <geos/geom/MultiPoint.h>
    00027 #include <geos/geom/MultiLineString.h>
    00028 #include <geos/geom/MultiPolygon.h>
    00029 #include <geos/export.h>
    00030 #include <geos/inline.h>
    00031
    00032 #include <vector>
    00033 #include <memory>
    00034 #include <cassert>
    00035
    00036 namespace geos {
    00037         namespace geom {
    00038                 class CoordinateSequenceFactory;
    00039                 class Coordinate;
    00040                 class CoordinateSequence;
    00041                 class Envelope;
    00042                 class Geometry;
    00043                 class GeometryCollection;
    00044                 class LineString;
    00045                 class LinearRing;
    00046                 class MultiLineString;
    00047                 class MultiPoint;
    00048                 class MultiPolygon;
    00049                 class Point;
    00050                 class Polygon;
    00051                 class PrecisionModel;
    00052         }
    00053 }
    00054
    00055 namespace geos {
    00056 namespace geom { // geos::geom
    00057
    00068 class GEOS_DLL GeometryFactory {
    00069 public:
    00075         GeometryFactory();
    00076
    00089         GeometryFactory(const PrecisionModel *pm, int newSRID,
    00090                 CoordinateSequenceFactory *nCoordinateSequenceFactory);
    00091
    00098         GeometryFactory(CoordinateSequenceFactory *nCoordinateSequenceFactory);
    00099
    00108         GeometryFactory(const PrecisionModel *pm);
    00109
    00119         GeometryFactory(const PrecisionModel* pm, int newSRID);
    00120
    00126         GeometryFactory(const GeometryFactory &gf);
    00127
    00134         static const GeometryFactory*
    00135         getDefaultInstance();
    00136
    00138         virtual ~GeometryFactory();
    00139
    00140 //Skipped a lot of list to array convertors
    00141
    00142         Point* createPointFromInternalCoord(const Coordinate* coord,
    00143                         const Geometry *exemplar) const;
    00144
    00146         //
    00149         Geometry* toGeometry(const Envelope* envelope) const;
    00150
    00154         const PrecisionModel* getPrecisionModel() const;
    00155
    00157         Point* createPoint() const;
    00158
    00160         Point* createPoint(const Coordinate& coordinate) const;
    00161
    00163         Point* createPoint(CoordinateSequence *coordinates) const;
    00164
    00166         Point* createPoint(const CoordinateSequence &coordinates) const;
    00167
    00169         GeometryCollection* createGeometryCollection() const;
    00170
    00172         Geometry* createEmptyGeometry() const;
    00173
    00175         GeometryCollection* createGeometryCollection(
    00176                         std::vector<Geometry *> *newGeoms) const;
    00177
    00179         GeometryCollection* createGeometryCollection(
    00180                         const std::vector<Geometry *> &newGeoms) const;
    00181
    00183         MultiLineString* createMultiLineString() const;
    00184
    00186         MultiLineString* createMultiLineString(
    00187                         std::vector<Geometry *> *newLines) const;
    00188
    00190         MultiLineString* createMultiLineString(
    00191                         const std::vector<Geometry *> &fromLines) const;
    00192
    00194         MultiPolygon* createMultiPolygon() const;
    00195
    00197         MultiPolygon* createMultiPolygon(std::vector<Geometry *> *newPolys) const;
    00198
    00200         MultiPolygon* createMultiPolygon(
    00201                         const std::vector<Geometry *> &fromPolys) const;
    00202
    00204         LinearRing* createLinearRing() const;
    00205
    00207         LinearRing* createLinearRing(CoordinateSequence* newCoords) const;
    00208
    00209         std::auto_ptr<Geometry> createLinearRing(
    00210                         std::auto_ptr<CoordinateSequence> newCoords) const;
    00211
    00213         LinearRing* createLinearRing(
    00214                         const CoordinateSequence& coordinates) const;
    00215
    00217         MultiPoint* createMultiPoint() const;
    00218
    00220         MultiPoint* createMultiPoint(std::vector<Geometry *> *newPoints) const;
    00221
    00223         MultiPoint* createMultiPoint(
    00224                         const std::vector<Geometry *> &fromPoints) const;
    00225
    00229         MultiPoint* createMultiPoint(
    00230                         const CoordinateSequence &fromCoords) const;
    00231
    00235         MultiPoint* createMultiPoint(
    00236                         const std::vector<Coordinate> &fromCoords) const;
    00237
    00239         Polygon* createPolygon() const;
    00240
    00242         Polygon* createPolygon(LinearRing *shell,
    00243                         std::vector<Geometry *> *holes) const;
    00244
    00246         Polygon* createPolygon(const LinearRing &shell,
    00247                         const std::vector<Geometry *> &holes) const;
    00248
    00250         LineString* createLineString() const;
    00251
    00253         std::auto_ptr<LineString> createLineString(const LineString& ls) const;
    00254
    00256         LineString* createLineString(CoordinateSequence* coordinates) const;
    00257
    00258         std::auto_ptr<Geometry> createLineString(
    00259                         std::auto_ptr<CoordinateSequence> coordinates) const;
    00260
    00262         LineString* createLineString(
    00263                         const CoordinateSequence& coordinates) const;
    00264
    00296         Geometry* buildGeometry(std::vector<Geometry *> *geoms) const;
    00297
    00299   //
    00306   template <class T>
    00307         std::auto_ptr<Geometry> buildGeometry(T from, T toofar) const
    00308   {
    00309     bool isHeterogeneous = false;
    00310     size_t count = 0;
    00311     int geomClass = -1;
    00312     for (T i=from; i != toofar; ++i)
    00313     {
    00314       ++count;
    00315       const Geometry* g = *i;
    00316       if ( geomClass < 0 ) {
    00317         geomClass = g->getClassSortIndex();
    00318       }
    00319       else if ( geomClass != g->getClassSortIndex() ) {
    00320         isHeterogeneous = true;
    00321       }
    00322     }
    00323
    00324     // for the empty geometry, return an empty GeometryCollection
    00325     if ( count == 0 ) {
    00326       return std::auto_ptr<Geometry>( createGeometryCollection() );
    00327     }
    00328
    00329     // for the single geometry, return a clone
    00330     if ( count == 1 ) {
    00331       return std::auto_ptr<Geometry>( (*from)->clone() );
    00332     }
    00333
    00334     // Now we know it is a collection
    00335
    00336     // FIXME:
    00337     // Until we tweak all the createMulti* interfaces
    00338     // to support taking iterators we'll have to build
    00339     // a custom vector here.
    00340     std::vector<Geometry*> fromGeoms;
    00341     for (T i=from; i != toofar; ++i) {
    00342       const Geometry* g = *i;
    00343       fromGeoms.push_back(const_cast<Geometry*>(g));
    00344     }
    00345
    00346
    00347     // for an heterogeneous ...
    00348     if ( isHeterogeneous ) {
    00349       return std::auto_ptr<Geometry>( createGeometryCollection(fromGeoms) );
    00350     }
    00351
    00352     // At this point we know the collection is not hetereogenous.
    00353     if ( dynamic_cast<const Polygon*>(*from) ) {
    00354       return std::auto_ptr<Geometry>( createMultiPolygon(fromGeoms) );
    00355     } else if ( dynamic_cast<const LineString*>(*from) ) {
    00356       return std::auto_ptr<Geometry>( createMultiLineString(fromGeoms) );
    00357     } else if ( dynamic_cast<const Point*>(*from) ) {
    00358       return std::auto_ptr<Geometry>( createMultiPoint(fromGeoms) );
    00359     }
    00360     // FIXME: Why not to throw an exception? --mloskot
    00361     assert(0); // buildGeomtry encountered an unkwnon geometry type
    00362     return std::auto_ptr<Geometry>(); // nullptr
    00363   }
    00364
    00372         Geometry* buildGeometry(const std::vector<Geometry *> &geoms) const;
    00373
    00374         int getSRID() const;
    00375
    00379         const CoordinateSequenceFactory* getCoordinateSequenceFactory() const;
    00380
    00382         Geometry* createGeometry(const Geometry *g) const;
    00383
    00385         void destroyGeometry(Geometry *g) const;
    00386
    00387 private:
    00388         const PrecisionModel* precisionModel;
    00389         int SRID;
    00390         const CoordinateSequenceFactory *coordinateListFactory;
    00391 };
    00392
    00393 } // namespace geos::geom
    00394 } // namespace geos
    00395
    00396 #ifdef GEOS_INLINE
    00397 # include "geos/geom/GeometryFactory.inl"
    00398 #endif
    00399
    00400 #endif // ndef GEOS_GEOM_GEOMETRYFACTORY_H
    00401
    00402 /**********************************************************************
    00403  * $Log$
    00404  * Revision 1.11  2006/07/08 00:33:55  strk
    00405  *         * configure.in: incremented CAPI minor version, to avoid                        falling behind any future version from the 2.2. branch.
    00406  *         * source/geom/Geometry.cpp, source/geom/GeometryFactory.cpp,
    00407  *         source/geomgraph/EdgeRing.cpp,
    00408  *         source/headers/geos/geom/Geometry.h,
    00409  *         source/headers/geos/geom/GeometryFactory.h,
    00410  *         source/headers/geos/geom/GeometryFactory.inl,
    00411  *         source/headers/geos/geomgraph/EdgeRing.h:
    00412  *         updated doxygen comments (sync with JTS head).
    00413  *         * source/headers/geos/platform.h.in: include <inttypes.h>
    00414  *         rather then <stdint.h>
    00415  *
    00416  * Revision 1.10  2006/06/19 21:17:24  strk
    00417  * port info and doxygen dox.
    00418  *
    00419  * Revision 1.9  2006/04/28 11:56:52  strk
    00420  * * source/geom/GeometryFactory.cpp, source/headers/geos/geom/GeometryFactory.h: added LineString copy constructor.
    00421  * * source/geom/Polygon.cpp: fixed getBoundary method to always return a geometry composed by LineStrings (not LinearRings)
    00422  *
    00423  * Revision 1.8  2006/04/12 11:39:34  strk
    00424  * Removed Geometry.h and CoordinateSequence.h includes.
    00425  * The former created a circular dependency.
    00426  *
    00427  * Revision 1.7  2006/04/11 11:16:25  strk
    00428  * Added LineString and LinearRing constructors by auto_ptr
    00429  *
    00430  * Revision 1.6  2006/04/10 13:09:49  strk
    00431  * Added GeometryFactory::defaultInstance()
    00432  * Made Geometry::INTERNAL_GEOMETRY_FACTORY an alias for it
    00433  * removed last deletion from Unload::Release class
    00434  *
    00435  * Revision 1.5  2006/03/31 17:51:26  strk
    00436  * A few assertion checking, comments cleanup, use of initialization lists
    00437  * in constructors, handled NULL parameters.
    00438  *
    00439  * Revision 1.4  2006/03/28 16:33:14  strk
    00440  * Added note about args responsibility in GeometryFactory constructor
    00441  *
    00442  * Revision 1.3  2006/03/24 09:52:41  strk
    00443  * USE_INLINE => GEOS_INLINE
    00444  *
    00445  * Revision 1.2  2006/03/20 17:27:03  strk
    00446  * Bug #72 - Missing <vector> header
    00447  *
    00448  * Revision 1.1  2006/03/09 16:46:49  strk
    00449  * geos::geom namespace definition, first pass at headers split
    00450  *
    00451  **********************************************************************/
    00452