mirror of https://gitee.com/bigwinds/arangodb
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 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_GRAPH_SINGLE_SERVER_EDGE_CURSOR_H
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#define ARANGOD_GRAPH_SINGLE_SERVER_EDGE_CURSOR_H 1
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#include "Basics/Common.h"
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#include "Graph/EdgeCursor.h"
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namespace arangodb {
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class LocalDocumentId;
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class ManagedDocumentResult;
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struct OperationCursor;
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class StringRef;
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class LogicalCollection;
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namespace transaction {
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class Methods;
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}
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namespace velocypack {
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class Slice;
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}
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namespace graph {
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struct BaseOptions;
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struct SingleServerEdgeDocumentToken;
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class SingleServerEdgeCursor final : public EdgeCursor {
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private:
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BaseOptions* _opts;
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transaction::Methods* _trx;
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ManagedDocumentResult* _mmdr;
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std::vector<std::vector<OperationCursor*>> _cursors;
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size_t _currentCursor;
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size_t _currentSubCursor;
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std::vector<LocalDocumentId> _cache;
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size_t _cachePos;
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std::vector<size_t> const* _internalCursorMapping;
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using Callback = std::function<void(EdgeDocumentToken&&, arangodb::velocypack::Slice, size_t)>;
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public:
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SingleServerEdgeCursor(ManagedDocumentResult* mmdr, BaseOptions* options,
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size_t, std::vector<size_t> const* mapping = nullptr);
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~SingleServerEdgeCursor();
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bool next(std::function<void(EdgeDocumentToken&&,
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arangodb::velocypack::Slice, size_t)>
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callback) override;
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void readAll(
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std::function<void(EdgeDocumentToken&&,
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arangodb::velocypack::Slice, size_t)>) override;
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std::vector<std::vector<OperationCursor*>>& getCursors() { return _cursors; }
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private:
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//returns false if cursor can not be further advanced
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bool advanceCursor(OperationCursor*& cursor, std::vector<OperationCursor*>& cursorSet);
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void getDocAndRunCallback(OperationCursor*, Callback callback);
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};
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} // namespace graph
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} // namespace arangodb
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#endif
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