mirror of https://gitee.com/bigwinds/arangodb
106 lines
3.0 KiB
C++
106 lines
3.0 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 Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_VOC_BASE_MANAGED_DOCUMENT_RESULT_H
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#define ARANGOD_VOC_BASE_MANAGED_DOCUMENT_RESULT_H 1
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#include "Basics/Common.h"
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#include "VocBase/LocalDocumentId.h"
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#include "VocBase/voc-types.h"
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namespace arangodb {
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namespace velocypack {
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class Builder;
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}
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class ManagedDocumentResult {
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public:
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ManagedDocumentResult() : _vpack(nullptr), _managed(false) {}
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ManagedDocumentResult(ManagedDocumentResult const& other) = default;
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ManagedDocumentResult& operator=(ManagedDocumentResult const& other) = default;
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ManagedDocumentResult& operator=(ManagedDocumentResult&& other) noexcept {
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_string = std::move(other._string);
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_vpack = other._vpack;
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_localDocumentId = other._localDocumentId;
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_managed = other._managed;
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other.clear();
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return *this;
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}
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ManagedDocumentResult(ManagedDocumentResult&& other) noexcept
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: _string(std::move(other._string)),
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_vpack(other._vpack),
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_localDocumentId(other._localDocumentId),
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_managed(other._managed) {
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other.clear();
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}
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void setUnmanaged(uint8_t const* vpack, LocalDocumentId const& documentId);
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void setManaged(uint8_t const* vpack, LocalDocumentId const& documentId);
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std::string* setManaged(LocalDocumentId const& documentId) {
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_string.clear();
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_vpack = nullptr;
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_localDocumentId = documentId;
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_managed = true;
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return &_string;
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}
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inline LocalDocumentId localDocumentId() const { return _localDocumentId; }
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void clear() noexcept {
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_string.clear();
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_vpack = nullptr;
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_localDocumentId.clear();
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_managed = false;
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}
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inline uint8_t const* vpack() const {
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if (_managed) {
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return reinterpret_cast<uint8_t const*>(_string.data());
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}
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TRI_ASSERT(_vpack != nullptr);
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return _vpack;
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}
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inline bool empty() const { return (!_managed && _vpack == nullptr); }
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inline bool canUseInExternal() const { return !_managed; }
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void addToBuilder(velocypack::Builder& builder, bool allowExternals) const;
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private:
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std::string _string;
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uint8_t* _vpack;
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LocalDocumentId _localDocumentId;
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bool _managed;
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};
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} // namespace arangodb
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#endif
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