mirror of https://gitee.com/bigwinds/arangodb
73 lines
2.2 KiB
C++
73 lines
2.2 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_INDEXES_INDEX_LOOKUP_CONTEXT_H
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#define ARANGOD_INDEXES_INDEX_LOOKUP_CONTEXT_H 1
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#include "Basics/Common.h"
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#include "Logger/Logger.h"
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#include "Transaction/Methods.h"
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#include "StorageEngine/DocumentIdentifierToken.h"
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#include "VocBase/LogicalCollection.h"
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#include "VocBase/ManagedDocumentResult.h"
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#include "VocBase/vocbase.h"
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namespace arangodb {
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class IndexLookupContext {
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public:
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IndexLookupContext() = delete;
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IndexLookupContext(transaction::Methods* trx, LogicalCollection* collection, ManagedDocumentResult* result, size_t numFields)
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: _trx(trx), _collection(collection), _result(result), _numFields(numFields) {
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TRI_ASSERT(_trx != nullptr);
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TRI_ASSERT(_collection != nullptr);
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TRI_ASSERT(_result != nullptr);
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}
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~IndexLookupContext() {}
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uint8_t const* lookup(DocumentIdentifierToken token) {
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try {
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if (_collection->readDocument(_trx, token, *_result)) {
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return _result->vpack();
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}
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} catch (...) {
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}
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return nullptr;
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}
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ManagedDocumentResult* result() { return _result; }
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inline size_t numFields() const { return _numFields; }
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private:
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transaction::Methods* _trx;
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LogicalCollection* _collection;
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ManagedDocumentResult* _result;
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size_t const _numFields;
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};
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}
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#endif
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