mirror of https://gitee.com/bigwinds/arangodb
86 lines
2.3 KiB
C++
86 lines
2.3 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_AQL_AQL_VALUE_GROUP_H
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#define ARANGOD_AQL_AQL_VALUE_GROUP_H 1
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#include "Aql/AqlValue.h"
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#include "Basics/Common.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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namespace aql {
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/// @brief hasher for a vector of AQL values
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struct AqlValueGroupHash {
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AqlValueGroupHash(transaction::Methods* trx, size_t num)
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: _trx(trx), _num(num) {}
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size_t operator()(std::vector<AqlValue> const& value) const {
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uint64_t hash = 0x12345678;
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TRI_ASSERT(value.size() == _num);
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for (auto const& it : value) {
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// we must use the slow hash function here, because a value may have
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// different representations in case its an array/object/number
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// (calls normalizedHash() internally)
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hash = it.hash(_trx, hash);
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}
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return static_cast<size_t>(hash);
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}
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transaction::Methods* _trx;
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size_t const _num;
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};
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/// @brief comparator for a vector of AQL values
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struct AqlValueGroupEqual {
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explicit AqlValueGroupEqual(transaction::Methods* trx) : _trx(trx) {}
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bool operator()(std::vector<AqlValue> const& lhs, std::vector<AqlValue> const& rhs) const {
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size_t const n = lhs.size();
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for (size_t i = 0; i < n; ++i) {
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int res = AqlValue::Compare(_trx, lhs[i], rhs[i], false);
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if (res != 0) {
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return false;
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}
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}
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return true;
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}
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transaction::Methods* _trx;
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};
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} // namespace aql
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} // namespace arangodb
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#endif
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