/**
 *    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 "mongo/base/status.h"
#include "mongo/db/index/btree_key_generator.h"
#include "mongo/db/index/index_access_method.h"
#include "mongo/db/jsobj.h"

namespace mongo {

class IndexDescriptor;

/**
 * The IndexAccessMethod for a Btree index.
 * Any index created with {field: 1} or {field: -1} uses this.
 */
class BtreeAccessMethod : public AbstractIndexAccessMethod {
public:
    BtreeAccessMethod(IndexCatalogEntry* btreeState, std::unique_ptr<SortedDataInterface> btree);

private:
    void doGetKeys(SharedBufferFragmentBuilder& pooledBufferBuilder,
                   const BSONObj& obj,
                   GetKeysContext context,
                   KeyStringSet* keys,
                   KeyStringSet* multikeyMetadataKeys,
                   MultikeyPaths* multikeyPaths,
                   boost::optional<RecordId> id) const final;

    // Our keys differ for V0 and V1.
    std::unique_ptr<BtreeKeyGenerator> _keyGenerator;
};

}  // namespace mongo