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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <string>
#include "mongo/base/disallow_copying.h"
#include "mongo/db/geo/shapes.h"
#include "third_party/s2/s2regionunion.h"
namespace mongo {
class GeometryContainer {
MONGO_DISALLOW_COPYING(GeometryContainer);
public:
/**
* Creates an empty geometry container which may then be loaded from BSON or directly.
*/
GeometryContainer() = default;
/**
* Loads an empty GeometryContainer from query.
*/
Status parseFromQuery(const BSONElement& elem);
/**
* Loads an empty GeometryContainer from stored geometry.
*/
Status parseFromStorage(const BSONElement& elem, bool skipValidation = false);
/**
* Is the geometry any of {Point, Line, Polygon}?
*/
bool isSimpleContainer() const;
/**
* Whether this geometry is a point
*/
bool isPoint() const;
/**
* Reports the CRS of the contained geometry.
* TODO: Rework once we have collections of multiple CRSes
*/
CRS getNativeCRS() const;
/**
* Whether or not this geometry can be projected into a particular CRS
*/
bool supportsProject(CRS crs) const;
/**
* Projects the current geometry into the supplied crs.
* It is an error to call this function if canProjectInto(crs) is false.
*/
void projectInto(CRS crs);
/**
* Minimum distance between this geometry and the supplied point.
* TODO: Rework and generalize to full GeometryContainer distance
*/
double minDistance(const PointWithCRS& point) const;
/**
* Only polygons (and aggregate types thereof) support contains.
*/
bool supportsContains() const;
/**
* To check containment, we iterate over the otherContainer's geometries. If we don't
* contain any sub-geometry of the otherContainer, the otherContainer is not contained
* within us. If each sub-geometry of the otherContainer is contained within us, we contain
* the entire otherContainer.
*/
bool contains(const GeometryContainer& otherContainer) const;
/**
* To check intersection, we iterate over the otherContainer's geometries, checking each
* geometry to see if we intersect it. If we intersect one geometry, we intersect the
* entire other container.
*/
bool intersects(const GeometryContainer& otherContainer) const;
// Region which can be used to generate a covering of the query object in the S2 space.
bool hasS2Region() const;
const S2Region& getS2Region() const;
// Region which can be used to generate a covering of the query object in euclidean space.
bool hasR2Region() const;
const R2Region& getR2Region() const;
// Returns a string related to the type of the geometry (for debugging queries)
std::string getDebugType() const;
// Needed for 2D wrapping check (for now)
// TODO: Remove these hacks
const CapWithCRS* getCapGeometryHack() const;
private:
class R2BoxRegion;
Status parseFromGeoJSON(const BSONObj& obj, bool skipValidation = false);
// Does 'this' intersect with the provided type?
bool intersects(const S2Cell& otherPoint) const;
bool intersects(const S2Polyline& otherLine) const;
bool intersects(const S2Polygon& otherPolygon) const;
// These three just iterate over the geometries and call the 3 methods above.
bool intersects(const MultiPointWithCRS& otherMultiPoint) const;
bool intersects(const MultiLineWithCRS& otherMultiLine) const;
bool intersects(const MultiPolygonWithCRS& otherMultiPolygon) const;
// Used when 'this' has a polygon somewhere, either in _polygon or _multiPolygon or
// _geometryCollection.
bool contains(const S2Cell& otherCell, const S2Point& otherPoint) const;
bool contains(const S2Polyline& otherLine) const;
bool contains(const S2Polygon& otherPolygon) const;
// Only one of these shared_ptrs should be non-NULL. S2Region is a
// superclass but it only supports testing against S2Cells. We need
// the most specific class we can get.
std::unique_ptr<PointWithCRS> _point;
std::unique_ptr<LineWithCRS> _line;
std::unique_ptr<BoxWithCRS> _box;
std::unique_ptr<PolygonWithCRS> _polygon;
std::unique_ptr<CapWithCRS> _cap;
std::unique_ptr<MultiPointWithCRS> _multiPoint;
std::unique_ptr<MultiLineWithCRS> _multiLine;
std::unique_ptr<MultiPolygonWithCRS> _multiPolygon;
std::unique_ptr<GeometryCollection> _geometryCollection;
// Cached for use during covering calculations
// TODO: _s2Region is currently generated immediately - don't necessarily need to do this
std::unique_ptr<S2RegionUnion> _s2Region;
std::unique_ptr<R2Region> _r2Region;
};
} // namespace mongo
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