mirror of https://gitee.com/bigwinds/arangodb
89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2019 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Michael Hackstein
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_PREGEL_INDEX_HELPERS_H
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#define ARANGOD_PREGEL_INDEX_HELPERS_H 1
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#include <memory>
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#include "Aql/Graphs.h"
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namespace arangodb {
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namespace transaction{
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class Methods;
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}
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struct OperationCursor;
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namespace traverser {
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Information required internally of the traverser.
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/// Used to easily pass around collections.
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/// Also offer abstraction to extract edges.
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////////////////////////////////////////////////////////////////////////////////
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class EdgeCollectionInfo {
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private:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief the underlying transaction
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//////////////////////////////////////////////////////////////////////////////
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transaction::Methods* _trx;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief edge collection name
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//////////////////////////////////////////////////////////////////////////////
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std::string _collectionName;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief Temporary builder for index search values
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/// NOTE: Single search builder is NOT thread-save
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//////////////////////////////////////////////////////////////////////////////
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aql::EdgeConditionBuilderContainer _searchBuilder;
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public:
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EdgeCollectionInfo(transaction::Methods* trx, std::string const& cname);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Get edges for the given direction and start vertex.
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////////////////////////////////////////////////////////////////////////////////
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std::unique_ptr<arangodb::OperationCursor> getEdges(std::string const&);
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transaction::Methods* trx() const { return _trx; }
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Return name of the wrapped collection
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////////////////////////////////////////////////////////////////////////////////
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std::string const& getName() const;
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};
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} // namespace traverser
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} // namespace arangodb
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#endif
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