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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/string_data.h"
namespace mongo {
class BSONObj;
/**
* We need to know what 'type' an index is in order to plan correctly.
*/
enum IndexType {
INDEX_BTREE,
INDEX_2D,
INDEX_HAYSTACK,
INDEX_2DSPHERE,
INDEX_2DSPHERE_BUCKET,
INDEX_TEXT,
INDEX_HASHED,
INDEX_WILDCARD,
};
/**
* We use the std::string representation of index names all over the place, so we declare them all
* once here.
*/
class IndexNames {
public:
static const std::string BTREE;
static const std::string GEO_2D;
static const std::string GEO_2DSPHERE;
static const std::string GEO_2DSPHERE_BUCKET;
static const std::string GEO_HAYSTACK;
static const std::string HASHED;
static const std::string TEXT;
static const std::string WILDCARD;
/**
* Return the first std::string value in the provided object. For an index key pattern,
* a field with a non-string value indicates a "special" (not straight Btree) index.
*/
static std::string findPluginName(const BSONObj& keyPattern);
/**
* Is the provided access method name one we recognize?
*/
static bool isKnownName(const std::string& name);
/**
* Convert an index name to an IndexType.
*/
static IndexType nameToType(StringData accessMethod);
};
} // namespace mongo
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