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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/lite_parsed_document_source.h"
#include "mongo/db/pipeline/lite_parsed_pipeline.h"
#include "mongo/db/stats/counters.h"
namespace mongo {
using Parser = LiteParsedDocumentSource::Parser;
namespace {
// Empty vector used by LiteParsedDocumentSources which do not have a sub pipeline.
inline static std::vector<LiteParsedPipeline> kNoSubPipeline = {};
StringMap<LiteParsedDocumentSource::LiteParserInfo> parserMap;
} // namespace
void LiteParsedDocumentSource::registerParser(const std::string& name,
Parser parser,
AllowedWithApiStrict allowedWithApiStrict,
AllowedWithClientType allowedWithClientType) {
parserMap[name] = {parser, allowedWithApiStrict, allowedWithClientType};
// Initialize a counter for this document source to track how many times it is used.
aggStageCounters.stageCounterMap[name] = std::make_unique<AggStageCounters::StageCounter>(name);
}
std::unique_ptr<LiteParsedDocumentSource> LiteParsedDocumentSource::parse(
const NamespaceString& nss, const BSONObj& spec) {
uassert(40323,
"A pipeline stage specification object must contain exactly one field.",
spec.nFields() == 1);
BSONElement specElem = spec.firstElement();
auto stageName = specElem.fieldNameStringData();
auto it = parserMap.find(stageName);
uassert(40324,
str::stream() << "Unrecognized pipeline stage name: '" << stageName << "'",
it != parserMap.end());
return it->second.parser(nss, specElem);
}
const LiteParsedDocumentSource::LiteParserInfo& LiteParsedDocumentSource::getInfo(
const std::string& stageName) {
auto it = parserMap.find(stageName);
uassert(5407200,
str::stream() << "Unrecognized pipeline stage name: '" << stageName << "'",
it != parserMap.end());
return it->second;
}
const std::vector<LiteParsedPipeline>& LiteParsedDocumentSource::getSubPipelines() const {
return kNoSubPipeline;
}
LiteParsedDocumentSourceNestedPipelines::LiteParsedDocumentSourceNestedPipelines(
std::string parseTimeName,
boost::optional<NamespaceString> foreignNss,
std::vector<LiteParsedPipeline> pipelines)
: LiteParsedDocumentSource(std::move(parseTimeName)),
_foreignNss(std::move(foreignNss)),
_pipelines(std::move(pipelines)) {}
LiteParsedDocumentSourceNestedPipelines::LiteParsedDocumentSourceNestedPipelines(
std::string parseTimeName,
boost::optional<NamespaceString> foreignNss,
boost::optional<LiteParsedPipeline> pipeline)
: LiteParsedDocumentSourceNestedPipelines(
std::move(parseTimeName), std::move(foreignNss), std::vector<LiteParsedPipeline>{}) {
if (pipeline)
_pipelines.emplace_back(std::move(pipeline.get()));
}
stdx::unordered_set<NamespaceString>
LiteParsedDocumentSourceNestedPipelines::getInvolvedNamespaces() const {
stdx::unordered_set<NamespaceString> involvedNamespaces;
if (_foreignNss)
involvedNamespaces.insert(*_foreignNss);
for (auto&& pipeline : _pipelines) {
auto involvedInSubPipe = pipeline.getInvolvedNamespaces();
involvedNamespaces.insert(involvedInSubPipe.begin(), involvedInSubPipe.end());
}
return involvedNamespaces;
}
bool LiteParsedDocumentSourceNestedPipelines::allowedToPassthroughFromMongos() const {
// If any of the sub-pipelines doesn't allow pass through, then return false.
return std::all_of(_pipelines.cbegin(), _pipelines.cend(), [](const auto& subPipeline) {
return subPipeline.allowedToPassthroughFromMongos();
});
}
bool LiteParsedDocumentSourceNestedPipelines::allowShardedForeignCollection(
NamespaceString nss) const {
return std::all_of(_pipelines.begin(), _pipelines.end(), [&nss](auto&& pipeline) {
return pipeline.allowShardedForeignCollection(nss);
});
}
} // namespace mongo
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