/usr/include/geos/geom/util/GeometryCombiner.h is in libgeos-dev 3.2.2-3ubuntu1.
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* $Id: GeometryCombiner.h 2772 2009-12-03 19:30:54Z mloskot $
*
* GEOS - Geometry Engine Open Source
* http://geos.refractions.net
*
* Copyright (C) 2006 Refractions Research 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.
*
**********************************************************************/
#ifndef GEOS_GEOM_UTIL_GEOMETRYCOMBINER_H
#define GEOS_GEOM_UTIL_GEOMETRYCOMBINER_H
#include <vector>
// Forward declarations
namespace geos {
namespace geom {
class Geometry;
class GeometryFactory;
}
}
namespace geos {
namespace geom { // geos.geom
namespace util { // geos.geom.util
/**
* Combines {@link Geometry}s
* to produce a {@link GeometryCollection} of the most appropriate type.
* Input geometries which are already collections
* will have their elements extracted first.
* No validation of the result geometry is performed.
* (The only case where invalidity is possible is where {@link Polygonal} geometries
* are combined and result in a self-intersection).
*
* @see GeometryFactory#buildGeometry
*/
class GeometryCombiner
{
public:
/**
* Combines a collection of geometries.
*
* @param geoms the geometries to combine
* @return the combined geometry
*/
static Geometry* combine(std::vector<Geometry*> const& geoms);
/**
* Combines two geometries.
*
* @param g0 a geometry to combine
* @param g1 a geometry to combine
* @return the combined geometry
*/
static Geometry* combine(Geometry* g0, Geometry* g1);
/**
* Combines three geometries.
*
* @param g0 a geometry to combine
* @param g1 a geometry to combine
* @param g2 a geometry to combine
* @return the combined geometry
*/
static Geometry* combine(Geometry* g0, Geometry* g1, Geometry* g2);
private:
GeometryFactory const* geomFactory;
bool skipEmpty;
std::vector<Geometry*> const& inputGeoms;
public:
/**
* Creates a new combiner for a collection of geometries
*
* @param geoms the geometries to combine
*/
GeometryCombiner(std::vector<Geometry*> const& geoms);
/**
* Extracts the GeometryFactory used by the geometries in a collection
*
* @param geoms
* @return a GeometryFactory
*/
static GeometryFactory const* extractFactory(std::vector<Geometry*> const& geoms);
/**
* Computes the combination of the input geometries
* to produce the most appropriate {@link Geometry} or {@link GeometryCollection}
*
* @return a Geometry which is the combination of the inputs
*/
Geometry* combine();
private:
void extractElements(Geometry* geom, std::vector<Geometry*>& elems);
// Declare type as noncopyable
GeometryCombiner(const GeometryCombiner& other);
GeometryCombiner& operator=(const GeometryCombiner& rhs);
};
} // namespace geos.geom.util
} // namespace geos.geom
} // namespace geos
#endif
/**********************************************************************
* $Log$
*
**********************************************************************/
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