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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 <cstddef>
#include <set>
#include <string>
#include <vector>
#include "mongo/base/string_data.h"
#include "mongo/db/repl/idempotency_scalar_generator.h"
#include "mongo/platform/random.h"
namespace mongo {
class DocumentStructureEnumerator;
class BSONObj;
struct BSONArray;
class BSONObjBuilder;
struct UpdateSequenceGeneratorConfig {
UpdateSequenceGeneratorConfig(std::set<StringData> fields_,
std::size_t depth_,
std::size_t lengthOfNumericComponent_,
double scalarProbability_ = 0.250,
double docProbability_ = 0.250,
double arrProbability_ = 0.250);
const std::set<StringData> fields = {};
const std::size_t depth = 0;
const std::size_t lengthOfNumericComponent = 0;
const double scalarProbability = 0.250;
const double docProbability = 0.250;
const double arrProbability = 0.250;
};
class UpdateSequenceGenerator {
public:
UpdateSequenceGenerator(UpdateSequenceGeneratorConfig config,
PseudoRandom random,
ScalarGenerator* scalarGenerator);
BSONObj generateUpdate() const;
std::vector<std::string> getPaths() const;
friend std::vector<std::string> eliminatePrefixPaths_forTest(
const std::string& path, const std::vector<std::string>& paths);
friend std::size_t getPathDepth_forTest(const std::string& path);
private:
enum class SetChoice : int { kSetScalar, kSetArr, kSetDoc, kNumTotalSetChoices = 3 };
static std::size_t _getPathDepth(const std::string& path);
/**
* Given a path parameter, removes all paths from a copy of the given path vector that are:
* 1) A prefix of the given path
* 2) Prefixable by the given path.
*
* This function also removes the given path itself from the given path vector, if it exists
* inside, since a path can prefix itself and therefore qualifies for both #1 and #2 above.
*
* A copy of the given path vector is returned after this pruning finishes.
*/
static std::vector<std::string> _eliminatePrefixPaths(const std::string& path,
const std::vector<std::string>& paths);
void _generatePaths(const UpdateSequenceGeneratorConfig& config, const std::string& path);
std::set<StringData> _getRemainingFields(const std::string& path) const;
DocumentStructureEnumerator _getValidEnumeratorForPath(const std::string& path) const;
std::vector<std::string> _getRandomPaths() const;
BSONObj _generateSet() const;
SetChoice _determineWhatToSet(const std::string& setPath) const;
void _appendSetArgToBuilder(const std::string& setPath, BSONObjBuilder* setArgBuilder) const;
BSONObj _generateUnset() const;
double _generateNumericToSet() const;
bool _generateBoolToSet() const;
BSONArray _generateArrToSet(const std::string& setPath) const;
BSONObj _generateDocToSet(const std::string& setPath) const;
std::vector<std::string> _paths;
const UpdateSequenceGeneratorConfig _config;
mutable PseudoRandom _random;
const ScalarGenerator* _scalarGenerator;
};
} // namespace mongo
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