mirror of https://gitee.com/bigwinds/arangodb
108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2017-2018 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Simon Grätzer
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_GEO_INDEX_H
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#define ARANGOD_GEO_INDEX_H 1
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#include <s2/s2cell_id.h>
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#include <s2/s2latlng.h>
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#include "Basics/Result.h"
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#include "Geo/GeoParams.h"
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namespace arangodb {
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namespace aql {
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struct AstNode;
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struct Variable;
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} // namespace aql
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namespace basics {
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struct AttributeName;
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}
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namespace velocypack {
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class Slice;
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}
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namespace geo {
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struct Coordinate;
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struct QueryParams;
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class ShapeContainer;
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} // namespace geo
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namespace geo_index {
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/// Mixin for geo indexes
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struct Index {
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/// @brief geo index variants
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enum class Variant : uint8_t {
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NONE = 0,
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/// two distinct fields representing GeoJSON Point
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INDIVIDUAL_LAT_LON,
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/// pair [<latitude>, <longitude>] eqvivalent to GeoJSON Point
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COMBINED_LAT_LON,
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// geojson object or legacy coordinate
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// pair [<longitude>, <latitude>]. Should also support
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// other geojson object types.
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GEOJSON
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};
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protected:
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/// @brief Initialize coverParams
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Index(velocypack::Slice const&, std::vector<std::vector<basics::AttributeName>> const&);
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public:
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/// @brief Parse document and return cells for indexing
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Result indexCells(velocypack::Slice const& doc, std::vector<S2CellId>& cells,
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S2Point& centroid) const;
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Result shape(velocypack::Slice const& doc, geo::ShapeContainer& shape) const;
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/// @brief Parse AQL condition into query parameters
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/// Public to allow usage by legacy geo indexes
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static void parseCondition(aql::AstNode const* node, aql::Variable const* reference,
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geo::QueryParams& params);
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Variant variant() const { return _variant; }
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private:
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static S2LatLng parseGeoDistance(aql::AstNode const* node, aql::Variable const* ref);
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static S2LatLng parseDistFCall(aql::AstNode const* node, aql::Variable const* ref);
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static void handleNode(aql::AstNode const* node, aql::Variable const* ref,
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geo::QueryParams& params);
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protected:
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/// @brief immutable region coverer parameters
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geo::RegionCoverParams _coverParams;
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/// @brief the type of geo we support
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Variant _variant;
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/// @brief attribute paths
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std::vector<std::string> _location;
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std::vector<std::string> _latitude;
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std::vector<std::string> _longitude;
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};
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} // namespace geo_index
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} // namespace arangodb
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#endif
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