mirror of https://gitee.com/bigwinds/arangodb
71 lines
2.4 KiB
C++
71 lines
2.4 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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#include "AttributeAccessor.h"
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#include "Aql/AqlItemBlock.h"
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#include "Aql/Variable.h"
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#include "Basics/VelocyPackHelper.h"
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#include "Utils/AqlTransaction.h"
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using namespace arangodb::aql;
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/// @brief create the accessor
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AttributeAccessor::AttributeAccessor(
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std::vector<std::string> const& attributeParts, Variable const* variable)
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: _attributeParts(attributeParts),
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_combinedName(),
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_variable(variable) {
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TRI_ASSERT(_variable != nullptr);
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}
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/// @brief replace the variable in the accessor
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void AttributeAccessor::replaceVariable(std::unordered_map<VariableId, Variable const*> const& replacements) {
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for (auto const& it : replacements) {
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if (it.first == _variable->id) {
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_variable = it.second;
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return;
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}
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}
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}
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/// @brief execute the accessor
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AqlValue AttributeAccessor::get(arangodb::AqlTransaction* trx,
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AqlItemBlock const* argv, size_t startPos,
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std::vector<Variable const*> const& vars,
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std::vector<RegisterId> const& regs,
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bool& mustDestroy) {
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size_t i = 0;
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for (auto it = vars.begin(); it != vars.end(); ++it, ++i) {
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if ((*it)->id == _variable->id) {
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// get the AQL value
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return argv->getValueReference(startPos, regs[i]).get(trx, _attributeParts, mustDestroy, true);
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}
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// fall-through intentional
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}
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mustDestroy = false;
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return AqlValue(arangodb::basics::VelocyPackHelper::NullValue());
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}
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