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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/exec/filter.h"
#include "mongo/db/exec/shard_filterer_impl.h"
#include "mongo/db/matcher/matchable.h"
#include "mongo/db/s/scoped_collection_metadata.h"
namespace mongo {
ShardFiltererImpl::ShardFiltererImpl(ScopedCollectionFilter cf) : _collectionFilter(std::move(cf)) {
if (_collectionFilter.isSharded()) {
_keyPattern = ShardKeyPattern(_collectionFilter.getKeyPattern());
}
}
ShardFilterer::DocumentBelongsResult ShardFiltererImpl::_shardKeyBelongsToMe(
const BSONObj shardKey) const {
if (shardKey.isEmpty()) {
return DocumentBelongsResult::kNoShardKey;
}
return _collectionFilter.keyBelongsToMe(shardKey) ? DocumentBelongsResult::kBelongs
: DocumentBelongsResult::kDoesNotBelong;
}
ShardFilterer::DocumentBelongsResult ShardFiltererImpl::documentBelongsToMe(
const WorkingSetMember& wsm) const {
if (!_collectionFilter.isSharded()) {
return DocumentBelongsResult::kBelongs;
}
if (wsm.hasObj()) {
return _shardKeyBelongsToMe(_keyPattern->extractShardKeyFromDoc(wsm.doc.value().toBson()));
}
// Transform 'IndexKeyDatum' provided by 'wsm' into 'IndexKeyData' to call
// extractShardKeyFromIndexKeyData().
invariant(!wsm.keyData.empty());
std::vector<ShardKeyPattern::IndexKeyData> indexKeyDataVector;
indexKeyDataVector.resize(wsm.keyData.size());
for (auto&& indexKeyData : wsm.keyData) {
indexKeyDataVector.push_back({indexKeyData.keyData, indexKeyData.indexKeyPattern});
}
return _shardKeyBelongsToMe(_keyPattern->extractShardKeyFromIndexKeyData(indexKeyDataVector));
}
ShardFilterer::DocumentBelongsResult ShardFiltererImpl::documentBelongsToMe(
const Document& doc) const {
if (!_collectionFilter.isSharded()) {
return DocumentBelongsResult::kBelongs;
}
return _shardKeyBelongsToMe(_keyPattern->extractShardKeyFromDoc(doc.toBson()));
}
} // namespace mongo
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