mirror of https://gitee.com/bigwinds/arangodb
83 lines
2.5 KiB
C++
83 lines
2.5 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 Max Neunhoeffer
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////////////////////////////////////////////////////////////////////////////////
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#include "Aql/CollectOptions.h"
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#include "Basics/Exceptions.h"
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#include <velocypack/velocypack-aliases.h>
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using namespace arangodb::aql;
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/// @brief constructor
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CollectOptions::CollectOptions(VPackSlice const& slice) {
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VPackSlice v = slice.get("collectOptions");
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if (v.isObject()) {
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v = v.get("method");
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if (v.isString()) {
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method = methodFromString(v.copyString());
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}
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}
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}
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/// @brief whether or not the hash method can be used
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bool CollectOptions::canUseHashMethod() const {
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if (method == CollectMethod::COLLECT_METHOD_SORTED) {
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return false;
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}
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return true;
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}
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/// @brief convert the options to VelocyPack
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void CollectOptions::toVelocyPack(VPackBuilder& builder) const {
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VPackObjectBuilder guard(&builder);
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builder.add("method", VPackValue(methodToString(method)));
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}
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/// @brief get the aggregation method from a string
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CollectOptions::CollectMethod CollectOptions::methodFromString(
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std::string const& method) {
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if (method == "hash") {
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return CollectMethod::COLLECT_METHOD_HASH;
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}
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if (method == "sorted") {
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return CollectMethod::COLLECT_METHOD_SORTED;
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}
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return CollectMethod::COLLECT_METHOD_UNDEFINED;
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}
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/// @brief stringify the aggregation method
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std::string CollectOptions::methodToString(
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CollectOptions::CollectMethod method) {
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if (method == CollectMethod::COLLECT_METHOD_HASH) {
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return std::string("hash");
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}
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if (method == CollectMethod::COLLECT_METHOD_SORTED) {
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return std::string("sorted");
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}
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL,
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"cannot stringify unknown aggregation method");
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}
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