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/**
* Copyright (C) 2021-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 "mongo/db/geo/geometry_container.h"
#include "mongo/db/geo/geoparser.h"
#include "mongo/db/matcher/expression.h"
namespace mongo {
/**
* An internal $geoWithin Match expression that has the same semantics as $geoWithin but is only
* used against timeseries collections.
*
* For example, consider the match expression
*
* {$_internalBucketGeoWithin: {
* withinRegion: {
* $geometry: {
* type : "Polygon" ,
* coordinates: [ [ [ 0, 0 ], [ 3, 6 ], [ 6, 1 ], [ 0, 0 ] ] ]
* }
* },
* field: "location"
* }}
*
* The document to match should be a bucket document in an underlying system.buckets.collection
* collection. Note that the 'field' value, "location", does not reflect the path in the matching
* document but the path in the document in the corresponding timeseries collection, because the
* document schma between the timeseries collection and the underlying bucket collection is
* different.
*
*/
class InternalBucketGeoWithinMatchExpression final : public MatchExpression {
public:
static constexpr StringData kName = "$_internalBucketGeoWithin"_sd;
static constexpr StringData kWithinRegion = "withinRegion"_sd;
static constexpr StringData kField = "field"_sd;
InternalBucketGeoWithinMatchExpression(std::shared_ptr<GeometryContainer> container,
std::string field,
clonable_ptr<ErrorAnnotation> annotation = nullptr)
: MatchExpression(MatchExpression::INTERNAL_BUCKET_GEO_WITHIN, std::move(annotation)),
_geoContainer(container),
_indexField("data." + field),
_field(std::move(field)) {}
void debugString(StringBuilder& debug, int indentationLevel) const final;
bool equivalent(const MatchExpression* expr) const final;
MatchCategory getCategory() const final {
return MatchCategory::kLeaf;
}
/**
* The input matches if the bucket document, 'doc', may contain any geo field that is within
* 'withinRegion'.
* - If false, the bucket must not contain any point that is within 'withinRegion'.
* - If true, the bucket may or may not contain points that are within the region. The bucket
* will go through the subsequent "unpack" stage so as to check each point in the bucket in an
* equivalent $geoWithin operator individually. Always returns true for any bucket containing
* objects not of type Point.
*/
bool matches(const MatchableDocument* doc, MatchDetails* details) const final;
bool matchesSingleElement(const BSONElement& element, MatchDetails* details) const final {
return false;
}
void serialize(BSONObjBuilder* builder, SerializationOptions opts) const final;
std::unique_ptr<MatchExpression> clone() const final;
std::vector<std::unique_ptr<MatchExpression>>* getChildVector() final {
return nullptr;
}
size_t numChildren() const final {
return 0;
}
MatchExpression* getChild(size_t i) const final {
MONGO_UNREACHABLE_TASSERT(6400208);
}
void resetChild(size_t, MatchExpression*) {
MONGO_UNREACHABLE;
};
std::string getField() const {
return _field;
}
const GeometryContainer& getGeoContainer() const {
return *_geoContainer;
}
StringData path() const final {
return _indexField;
}
const FieldRef* fieldRef() const final {
MONGO_UNREACHABLE_TASSERT(5837104);
return nullptr;
}
void acceptVisitor(MatchExpressionMutableVisitor* visitor) final {
visitor->visit(this);
}
void acceptVisitor(MatchExpressionConstVisitor* visitor) const final {
visitor->visit(this);
}
private:
ExpressionOptimizerFunc getOptimizer() const final {
return [](std::unique_ptr<MatchExpression> expression) {
return expression;
};
}
/**
* Helper function for matches() and matchesSingleElement().
*/
bool _matchesBSONObj(const BSONObj& obj) const;
std::shared_ptr<GeometryContainer> _geoContainer;
std::string _indexField;
std::string _field;
};
} // namespace mongo
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