mirror of https://gitee.com/bigwinds/arangodb
107 lines
3.8 KiB
C++
107 lines
3.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Max Neunhoeffer
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "Aql/CollectOptions.h"
|
|
#include "Basics/Exceptions.h"
|
|
|
|
#include <velocypack/velocypack-aliases.h>
|
|
|
|
using namespace arangodb::aql;
|
|
using Json = arangodb::basics::Json;
|
|
using JsonHelper = arangodb::basics::JsonHelper;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief constructor, using JSON
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
CollectOptions::CollectOptions(Json const& json) {
|
|
Json obj = json.get("collectOptions");
|
|
|
|
method =
|
|
methodFromString(JsonHelper::getStringValue(obj.json(), "method", ""));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief whether or not the hash method can be used
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool CollectOptions::canUseHashMethod() const {
|
|
if (method == CollectMethod::COLLECT_METHOD_SORTED) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief convert the options to JSON
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void CollectOptions::toJson(arangodb::basics::Json& json,
|
|
TRI_memory_zone_t* zone) const {
|
|
Json options = Json(Json::Object, 1)("method", Json(methodToString(method)));
|
|
json("collectOptions", options);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief convert the options to VelocyPack
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void CollectOptions::toVelocyPack(VPackBuilder& builder) const {
|
|
VPackObjectBuilder guard(&builder);
|
|
builder.add("method", VPackValue(methodToString(method)));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief get the aggregation method from a string
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
CollectOptions::CollectMethod CollectOptions::methodFromString(
|
|
std::string const& method) {
|
|
if (method == "hash") {
|
|
return CollectMethod::COLLECT_METHOD_HASH;
|
|
}
|
|
if (method == "sorted") {
|
|
return CollectMethod::COLLECT_METHOD_SORTED;
|
|
}
|
|
|
|
return CollectMethod::COLLECT_METHOD_UNDEFINED;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief stringify the aggregation method
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::string CollectOptions::methodToString(
|
|
CollectOptions::CollectMethod method) {
|
|
if (method == CollectMethod::COLLECT_METHOD_HASH) {
|
|
return std::string("hash");
|
|
}
|
|
if (method == CollectMethod::COLLECT_METHOD_SORTED) {
|
|
return std::string("sorted");
|
|
}
|
|
|
|
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL,
|
|
"cannot stringify unknown aggregation method");
|
|
}
|