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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/pipeline/granularity_rounder.h"
#include "mongo/util/string_map.h"
namespace mongo {
using Rounder = GranularityRounder::Rounder;
namespace {
// Used to keep track of which GranularityRounders are registered under which name.
StringMap<Rounder> rounderMap;
} // namespace
void GranularityRounder::registerGranularityRounder(StringData name, Rounder rounder) {
auto it = rounderMap.find(name);
massert(40256,
str::stream() << "Duplicate granularity rounder (" << name << ") registered.",
it == rounderMap.end());
rounderMap[name] = rounder;
}
boost::intrusive_ptr<GranularityRounder> GranularityRounder::getGranularityRounder(
const boost::intrusive_ptr<ExpressionContext>& expCtx, StringData granularity) {
auto it = rounderMap.find(granularity);
uassert(40257,
str::stream() << "Unknown rounding granularity '" << granularity << "'",
it != rounderMap.end());
return it->second(expCtx);
}
} // namespace mongo
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