mirror of https://gitee.com/bigwinds/arangodb
827 lines
26 KiB
C++
827 lines
26 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 Michael Hackstein
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////////////////////////////////////////////////////////////////////////////////
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#include "VelocyPackHelper.h"
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#include "Basics/conversions.h"
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#include "Basics/Exceptions.h"
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#include "Logger/Logger.h"
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#include "Basics/StaticStrings.h"
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#include "Basics/StringUtils.h"
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#include "Basics/Utf8Helper.h"
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#include "Basics/VPackStringBufferAdapter.h"
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#include "Basics/files.h"
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#include "Basics/hashes.h"
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#include "Basics/tri-strings.h"
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#include <velocypack/AttributeTranslator.h>
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#include <velocypack/velocypack-common.h>
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#include <velocypack/Collection.h>
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#include <velocypack/Dumper.h>
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#include <velocypack/Options.h>
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#include <velocypack/Slice.h>
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#include <velocypack/velocypack-aliases.h>
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extern "C" {
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unsigned long long XXH64 (const void* input, size_t length, unsigned long long seed);
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}
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using VelocyPackHelper = arangodb::basics::VelocyPackHelper;
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static std::unique_ptr<VPackAttributeTranslator> Translator;
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static std::unique_ptr<VPackAttributeExcludeHandler> ExcludeHandler;
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// attribute exclude handler for skipping over system attributes
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struct SystemAttributeExcludeHandler : public VPackAttributeExcludeHandler {
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bool shouldExclude(VPackSlice const& key, int nesting) override final {
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VPackValueLength keyLength;
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char const* p = key.getString(keyLength);
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if (p == nullptr || *p != '_' || keyLength < 3 || keyLength > 5 || nesting > 0) {
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// keep attribute
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return true;
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}
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// exclude these attributes (but not _key!)
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if ((keyLength == 3 && memcmp(p, "_id", keyLength) == 0) ||
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(keyLength == 4 && memcmp(p, "_rev", keyLength) == 0) ||
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(keyLength == 3 && memcmp(p, "_to", keyLength) == 0) ||
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(keyLength == 5 && memcmp(p, "_from", keyLength) == 0)) {
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return true;
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}
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// keep attribute
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return false;
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}
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};
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////////////////////////////////////////////////////////////////////////////////
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/// @brief static initializer for all VPack values
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////////////////////////////////////////////////////////////////////////////////
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void VelocyPackHelper::initialize() {
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LOG(TRACE) << "initializing vpack";
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// initialize attribute translator
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Translator.reset(new VPackAttributeTranslator);
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// these attribute names will be translated into short integer values
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Translator->add(StaticStrings::KeyString, KeyAttribute - AttributeBase);
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Translator->add(StaticStrings::RevString, RevAttribute - AttributeBase);
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Translator->add(StaticStrings::IdString, IdAttribute - AttributeBase);
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Translator->add(StaticStrings::FromString, FromAttribute - AttributeBase);
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Translator->add(StaticStrings::ToString, ToAttribute - AttributeBase);
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Translator->seal();
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// set the attribute translator in the global options
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VPackOptions::Defaults.attributeTranslator = Translator.get();
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VPackOptions::Defaults.unsupportedTypeBehavior = VPackOptions::ConvertUnsupportedType;
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// run quick selfs test with the attribute translator
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TRI_ASSERT(VPackSlice(Translator->translate(StaticStrings::KeyString)).getUInt() == KeyAttribute - AttributeBase);
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TRI_ASSERT(VPackSlice(Translator->translate(StaticStrings::RevString)).getUInt() == RevAttribute - AttributeBase);
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TRI_ASSERT(VPackSlice(Translator->translate(StaticStrings::IdString)).getUInt() == IdAttribute - AttributeBase);
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TRI_ASSERT(VPackSlice(Translator->translate(StaticStrings::FromString)).getUInt() == FromAttribute - AttributeBase);
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TRI_ASSERT(VPackSlice(Translator->translate(StaticStrings::ToString)).getUInt() == ToAttribute - AttributeBase);
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TRI_ASSERT(VPackSlice(Translator->translate(KeyAttribute - AttributeBase)).copyString() == StaticStrings::KeyString);
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TRI_ASSERT(VPackSlice(Translator->translate(RevAttribute - AttributeBase)).copyString() == StaticStrings::RevString);
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TRI_ASSERT(VPackSlice(Translator->translate(IdAttribute - AttributeBase)).copyString() == StaticStrings::IdString);
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TRI_ASSERT(VPackSlice(Translator->translate(FromAttribute - AttributeBase)).copyString() == StaticStrings::FromString);
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TRI_ASSERT(VPackSlice(Translator->translate(ToAttribute - AttributeBase)).copyString() == StaticStrings::ToString);
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// initialize exclude handler for system attributes
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ExcludeHandler.reset(new SystemAttributeExcludeHandler);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief turn off assembler optimizations in vpack
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////////////////////////////////////////////////////////////////////////////////
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void VelocyPackHelper::disableAssemblerFunctions() {
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arangodb::velocypack::disableAssemblerFunctions();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief return the (global) attribute exclude handler instance
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////////////////////////////////////////////////////////////////////////////////
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arangodb::velocypack::AttributeExcludeHandler* VelocyPackHelper::getExcludeHandler() {
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return ExcludeHandler.get();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief return the (global) attribute translator instance
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////////////////////////////////////////////////////////////////////////////////
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arangodb::velocypack::AttributeTranslator* VelocyPackHelper::getTranslator() {
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return Translator.get();
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}
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bool VelocyPackHelper::AttributeSorterUTF8::operator()(std::string const& l,
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std::string const& r) const {
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// use UTF-8-based comparison of attribute names
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return TRI_compare_utf8(l.c_str(), l.size(), r.c_str(), r.size()) < 0;
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}
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bool VelocyPackHelper::AttributeSorterBinary::operator()(std::string const& l,
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std::string const& r) const {
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// use binary comparison of attribute names
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size_t cmpLength = (std::min)(l.size(), r.size());
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int res = memcmp(l.c_str(), r.c_str(), cmpLength);
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if (res < 0) {
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return true;
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}
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if (res == 0) {
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return l.size() < r.size();
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}
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return false;
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}
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size_t VelocyPackHelper::VPackHash::operator()(VPackSlice const& slice) const {
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return slice.normalizedHash();
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};
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size_t VelocyPackHelper::VPackStringHash::operator()(VPackSlice const& slice) const noexcept {
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return slice.hashString();
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};
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bool VelocyPackHelper::VPackEqual::operator()(VPackSlice const& lhs, VPackSlice const& rhs) const {
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return VelocyPackHelper::compare(lhs, rhs, false, _options) == 0;
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};
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bool VelocyPackHelper::VPackStringEqual::operator()(VPackSlice const& lhs, VPackSlice const& rhs) const noexcept {
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auto const lh = lhs.head();
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auto const rh = rhs.head();
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if (lh != rh) {
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return false;
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}
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VPackValueLength size;
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if (lh == 0xbf) {
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// long UTF-8 String
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size = static_cast<VPackValueLength>(velocypack::readInteger<VPackValueLength>(lhs.begin() + 1, 8));
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if (size !=static_cast<VPackValueLength>(velocypack::readInteger<VPackValueLength>(rhs.begin() + 1, 8))) {
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return false;
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}
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return (memcmp(lhs.start() + 1 + 8, rhs.start() + 1 + 8, static_cast<size_t>(size)) == 0);
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}
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size = static_cast<VPackValueLength>(lh - 0x40);
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return (memcmp(lhs.start() + 1, rhs.start() + 1, static_cast<size_t>(size)) == 0);
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};
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static int TypeWeight(VPackSlice const& slice) {
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switch (slice.type()) {
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case VPackValueType::MinKey:
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return -99; // must be lowest
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case VPackValueType::Illegal:
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return -1;
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case VPackValueType::None:
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case VPackValueType::Null:
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return 0;
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case VPackValueType::Bool:
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return 1;
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case VPackValueType::Double:
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case VPackValueType::Int:
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case VPackValueType::UInt:
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case VPackValueType::SmallInt:
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case VPackValueType::UTCDate:
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case VPackValueType::BCD:
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return 2;
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case VPackValueType::String:
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case VPackValueType::Binary:
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case VPackValueType::Custom:
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// custom type is used for _id (which is a string)
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return 3;
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case VPackValueType::Array:
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return 4;
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case VPackValueType::Object:
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return 5;
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case VPackValueType::External:
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return TypeWeight(slice.resolveExternal());
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case VPackValueType::MaxKey:
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return 99; // must be highest
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default:
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// All other values have equal weight
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return 0;
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}
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}
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int VelocyPackHelper::compareNumberValues(VPackSlice lhs, VPackSlice rhs) {
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VPackValueType const lType = lhs.type();
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if (lType == rhs.type()) {
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// both types are equal
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if (lType == VPackValueType::Int || lType == VPackValueType::SmallInt) {
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// use exact comparisons. no need to cast to double
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int64_t l = lhs.getInt();
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int64_t r = rhs.getInt();
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if (l == r) {
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return 0;
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}
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return (l < r ? -1 : 1);
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}
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if (lType == VPackValueType::UInt) {
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// use exact comparisons. no need to cast to double
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uint64_t l = lhs.getUInt();
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uint64_t r = rhs.getUInt();
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if (l == r) {
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return 0;
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}
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return (l < r ? -1 : 1);
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}
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// fallthrough to double comparison
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}
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double left = lhs.getNumericValue<double>();
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double right = rhs.getNumericValue<double>();
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if (left == right) {
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return 0;
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}
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return (left < right ? -1 : 1);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a boolean sub-element, or a default if it is does not exist
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////////////////////////////////////////////////////////////////////////////////
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bool VelocyPackHelper::getBooleanValue(VPackSlice const& slice,
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char const* name, bool defaultValue) {
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TRI_ASSERT(slice.isObject());
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if (!slice.hasKey(name)) {
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return defaultValue;
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}
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VPackSlice const& sub = slice.get(name);
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if (sub.isBoolean()) {
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return sub.getBool();
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}
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return defaultValue;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a string sub-element, or throws if <name> does not exist
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/// or it is not a string
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////////////////////////////////////////////////////////////////////////////////
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std::string VelocyPackHelper::checkAndGetStringValue(VPackSlice const& slice,
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char const* name) {
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TRI_ASSERT(slice.isObject());
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if (!slice.hasKey(name)) {
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std::string msg =
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"The attribute '" + std::string(name) + "' was not found.";
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_BAD_PARAMETER, msg);
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}
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VPackSlice const sub = slice.get(name);
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if (!sub.isString()) {
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std::string msg =
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"The attribute '" + std::string(name) + "' is not a string.";
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_BAD_PARAMETER, msg);
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}
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return sub.copyString();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a string sub-element, or throws if <name> does not exist
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/// or it is not a string
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////////////////////////////////////////////////////////////////////////////////
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std::string VelocyPackHelper::checkAndGetStringValue(VPackSlice const& slice,
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std::string const& name) {
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TRI_ASSERT(slice.isObject());
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if (!slice.hasKey(name)) {
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std::string msg =
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"The attribute '" + name + "' was not found.";
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_BAD_PARAMETER, msg);
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}
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VPackSlice const sub = slice.get(name);
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if (!sub.isString()) {
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std::string msg =
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"The attribute '" + name + "' is not a string.";
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_BAD_PARAMETER, msg);
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}
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return sub.copyString();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a string value, or the default value if it is not a string
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////////////////////////////////////////////////////////////////////////////////
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std::string VelocyPackHelper::getStringValue(VPackSlice const& slice,
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std::string const& defaultValue) {
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if (!slice.isString()) {
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return defaultValue;
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}
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return slice.copyString();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a string sub-element, or the default value if it does not
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/// exist
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/// or it is not a string
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////////////////////////////////////////////////////////////////////////////////
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std::string VelocyPackHelper::getStringValue(VPackSlice slice,
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char const* name,
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std::string const& defaultValue) {
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if (slice.isExternal()) {
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slice = VPackSlice(slice.getExternal());
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}
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TRI_ASSERT(slice.isObject());
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if (!slice.hasKey(name)) {
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return defaultValue;
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}
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VPackSlice const sub = slice.get(name);
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if (!sub.isString()) {
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return defaultValue;
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}
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return sub.copyString();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a string sub-element, or the default value if it does not
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/// exist
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/// or it is not a string
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////////////////////////////////////////////////////////////////////////////////
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std::string VelocyPackHelper::getStringValue(VPackSlice slice,
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std::string const& name,
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std::string const& defaultValue) {
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if (slice.isExternal()) {
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slice = VPackSlice(slice.getExternal());
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}
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TRI_ASSERT(slice.isObject());
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if (!slice.hasKey(name)) {
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return defaultValue;
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}
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VPackSlice const sub = slice.get(name);
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if (!sub.isString()) {
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return defaultValue;
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}
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return sub.copyString();
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}
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uint64_t VelocyPackHelper::stringUInt64(VPackSlice const& slice) {
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if (slice.isString()) {
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return arangodb::basics::StringUtils::uint64(slice.copyString());
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}
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if (slice.isNumber()) {
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return slice.getNumericValue<uint64_t>();
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}
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return 0;
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}
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TRI_json_t* VelocyPackHelper::velocyPackToJson(VPackSlice const& slice, VPackOptions const* options) {
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return JsonHelper::fromString(slice.toJson(options));
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief parses a json file to VelocyPack
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////////////////////////////////////////////////////////////////////////////////
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std::shared_ptr<VPackBuilder> VelocyPackHelper::velocyPackFromFile(
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std::string const& path) {
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size_t length;
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char* content = TRI_SlurpFile(TRI_UNKNOWN_MEM_ZONE, path.c_str(), &length);
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if (content != nullptr) {
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// The Parser might THROW
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std::shared_ptr<VPackBuilder> b;
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try {
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auto b = VPackParser::fromJson(reinterpret_cast<uint8_t const*>(content),
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length);
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, content);
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return b;
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} catch (...) {
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, content);
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throw;
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}
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}
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THROW_ARANGO_EXCEPTION(TRI_ERROR_OUT_OF_MEMORY);
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}
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static bool PrintVelocyPack(int fd, VPackSlice const& slice,
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bool appendNewline) {
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if (slice.isNone()) {
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// sanity check
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return false;
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}
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TRI_string_buffer_t buffer;
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TRI_InitStringBuffer(&buffer, TRI_UNKNOWN_MEM_ZONE);
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arangodb::basics::VPackStringBufferAdapter bufferAdapter(&buffer);
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try {
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VPackDumper dumper(&bufferAdapter);
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dumper.dump(slice);
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} catch (...) {
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// Writing failed
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TRI_AnnihilateStringBuffer(&buffer);
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return false;
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}
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if (TRI_LengthStringBuffer(&buffer) == 0) {
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// should not happen
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return false;
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}
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if (appendNewline) {
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// add the newline here so we only need one write operation in the ideal
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// case
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TRI_AppendCharStringBuffer(&buffer, '\n');
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}
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char const* p = TRI_BeginStringBuffer(&buffer);
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size_t n = TRI_LengthStringBuffer(&buffer);
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while (0 < n) {
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ssize_t m = TRI_WRITE(fd, p, (TRI_write_t)n);
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if (m <= 0) {
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TRI_AnnihilateStringBuffer(&buffer);
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return false;
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}
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n -= m;
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p += m;
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}
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TRI_AnnihilateStringBuffer(&buffer);
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief writes a VelocyPack to a file
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////////////////////////////////////////////////////////////////////////////////
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bool VelocyPackHelper::velocyPackToFile(char const* filename,
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VPackSlice const& slice,
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bool syncFile) {
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std::string const tmp = std::string(filename) + ".tmp";
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// remove a potentially existing temporary file
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if (TRI_ExistsFile(tmp.c_str())) {
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TRI_UnlinkFile(tmp.c_str());
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}
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int fd = TRI_CREATE(tmp.c_str(), O_CREAT | O_TRUNC | O_EXCL | O_RDWR | TRI_O_CLOEXEC,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
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if (fd < 0) {
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TRI_set_errno(TRI_ERROR_SYS_ERROR);
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LOG(ERR) << "cannot create json file '" << tmp << "': " << TRI_LAST_ERROR_STR;
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return false;
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}
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if (!PrintVelocyPack(fd, slice, true)) {
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TRI_CLOSE(fd);
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TRI_set_errno(TRI_ERROR_SYS_ERROR);
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LOG(ERR) << "cannot write to json file '" << tmp << "': " << TRI_LAST_ERROR_STR;
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TRI_UnlinkFile(tmp.c_str());
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return false;
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}
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if (syncFile) {
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LOG(TRACE) << "syncing tmp file '" << tmp << "'";
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|
|
if (!TRI_fsync(fd)) {
|
|
TRI_CLOSE(fd);
|
|
TRI_set_errno(TRI_ERROR_SYS_ERROR);
|
|
LOG(ERR) << "cannot sync saved json '" << tmp << "': " << TRI_LAST_ERROR_STR;
|
|
TRI_UnlinkFile(tmp.c_str());
|
|
return false;
|
|
}
|
|
}
|
|
|
|
int res = TRI_CLOSE(fd);
|
|
|
|
if (res < 0) {
|
|
TRI_set_errno(TRI_ERROR_SYS_ERROR);
|
|
LOG(ERR) << "cannot close saved file '" << tmp << "': " << TRI_LAST_ERROR_STR;
|
|
TRI_UnlinkFile(tmp.c_str());
|
|
return false;
|
|
}
|
|
|
|
res = TRI_RenameFile(tmp.c_str(), filename);
|
|
|
|
if (res != TRI_ERROR_NO_ERROR) {
|
|
TRI_set_errno(res);
|
|
LOG(ERR) << "cannot rename saved file '" << tmp << "' to '" << filename << "': " << TRI_LAST_ERROR_STR;
|
|
TRI_UnlinkFile(tmp.c_str());
|
|
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int VelocyPackHelper::compare(VPackSlice lhs, VPackSlice rhs,
|
|
bool useUTF8, VPackOptions const* options,
|
|
VPackSlice const* lhsBase, VPackSlice const* rhsBase) {
|
|
lhs = lhs.resolveExternal(); // follow externals
|
|
rhs = rhs.resolveExternal(); // follow externals
|
|
|
|
{
|
|
int lWeight = TypeWeight(lhs);
|
|
int rWeight = TypeWeight(rhs);
|
|
|
|
if (lWeight < rWeight) {
|
|
return -1;
|
|
}
|
|
|
|
if (lWeight > rWeight) {
|
|
return 1;
|
|
}
|
|
|
|
TRI_ASSERT(lWeight == rWeight);
|
|
}
|
|
|
|
// lhs and rhs have equal weights
|
|
if (lhs.isNone() || rhs.isNone()) {
|
|
// either lhs or rhs is none. we cannot be sure here that both are
|
|
// nones.
|
|
// there can also exist the situation that lhs is a none and rhs is a
|
|
// null value
|
|
// (or vice versa). Anyway, the compare value is the same for both,
|
|
return 0;
|
|
}
|
|
|
|
switch (lhs.type()) {
|
|
case VPackValueType::Illegal:
|
|
case VPackValueType::MinKey:
|
|
case VPackValueType::MaxKey:
|
|
return 0;
|
|
case VPackValueType::None:
|
|
case VPackValueType::Null:
|
|
return 0; // null == null;
|
|
case VPackValueType::Bool: {
|
|
bool left = lhs.getBoolean();
|
|
bool right = rhs.getBoolean();
|
|
if (left == right) {
|
|
return 0;
|
|
}
|
|
if (!left && right) {
|
|
return -1;
|
|
}
|
|
return 1;
|
|
}
|
|
case VPackValueType::Double:
|
|
case VPackValueType::Int:
|
|
case VPackValueType::UInt:
|
|
case VPackValueType::SmallInt: {
|
|
return compareNumberValues(lhs, rhs);
|
|
}
|
|
case VPackValueType::Custom:
|
|
case VPackValueType::String: {
|
|
std::string lhsString;
|
|
VPackValueLength nl;
|
|
char const* left;
|
|
if (lhs.isCustom()) {
|
|
if (lhsBase == nullptr || options == nullptr || options->customTypeHandler == nullptr) {
|
|
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL,
|
|
"Could not extract custom attribute.");
|
|
}
|
|
lhsString.assign(options->customTypeHandler->toString(lhs, options, *lhsBase));
|
|
left = lhsString.c_str();
|
|
nl = lhsString.size();
|
|
} else {
|
|
left = lhs.getString(nl);
|
|
}
|
|
TRI_ASSERT(left != nullptr);
|
|
|
|
std::string rhsString;
|
|
VPackValueLength nr;
|
|
char const* right;
|
|
if (rhs.isCustom()) {
|
|
if (rhsBase == nullptr || options == nullptr || options->customTypeHandler == nullptr) {
|
|
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL,
|
|
"Could not extract custom attribute.");
|
|
}
|
|
rhsString.assign(options->customTypeHandler->toString(rhs, options, *rhsBase));
|
|
right = rhsString.c_str();
|
|
nr = rhsString.size();
|
|
} else {
|
|
right = rhs.getString(nr);
|
|
}
|
|
TRI_ASSERT(right != nullptr);
|
|
|
|
int res;
|
|
if (useUTF8) {
|
|
res = TRI_compare_utf8(left, nl, right, nr);
|
|
} else {
|
|
size_t len = static_cast<size_t>(nl < nr ? nl : nr);
|
|
res = memcmp(left, right, len);
|
|
}
|
|
if (res < 0) {
|
|
return -1;
|
|
}
|
|
if (res > 0) {
|
|
return 1;
|
|
}
|
|
// res == 0
|
|
if (nl == nr) {
|
|
return 0;
|
|
}
|
|
// res == 0, but different string lengths
|
|
return nl < nr ? -1 : 1;
|
|
}
|
|
case VPackValueType::Array: {
|
|
VPackValueLength const nl = lhs.length();
|
|
VPackValueLength const nr = rhs.length();
|
|
VPackValueLength const n = (std::max)(nr, nl);
|
|
for (VPackValueLength i = 0; i < n; ++i) {
|
|
VPackSlice lhsValue;
|
|
if (i < nl) {
|
|
lhsValue = lhs.at(i).resolveExternal();
|
|
}
|
|
VPackSlice rhsValue;
|
|
if (i < nr) {
|
|
rhsValue = rhs.at(i).resolveExternal();
|
|
}
|
|
|
|
int result = compare(lhsValue, rhsValue, useUTF8, options, &lhs, &rhs);
|
|
if (result != 0) {
|
|
return result;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
case VPackValueType::Object: {
|
|
std::set<std::string, AttributeSorterUTF8> keys;
|
|
VPackCollection::keys(lhs, keys);
|
|
VPackCollection::keys(rhs, keys);
|
|
for (auto const& key : keys) {
|
|
VPackSlice lhsValue = lhs.get(key).resolveExternal();
|
|
if (lhsValue.isNone()) {
|
|
// not present => null
|
|
lhsValue = VPackSlice::nullSlice();
|
|
}
|
|
VPackSlice rhsValue = rhs.get(key).resolveExternal();
|
|
if (rhsValue.isNone()) {
|
|
// not present => null
|
|
rhsValue = VPackSlice::nullSlice();
|
|
}
|
|
|
|
int result = compare(lhsValue, rhsValue, useUTF8, options, &lhs, &rhs);
|
|
if (result != 0) {
|
|
return result;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
default:
|
|
// Contains all other ValueTypes of VelocyPack.
|
|
// They are not used in ArangoDB so this cannot occur
|
|
TRI_ASSERT(false);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
VPackBuilder VelocyPackHelper::merge(VPackSlice const& lhs,
|
|
VPackSlice const& rhs,
|
|
bool nullMeansRemove, bool mergeObjects) {
|
|
return VPackCollection::merge(lhs, rhs, mergeObjects, nullMeansRemove);
|
|
}
|
|
|
|
double VelocyPackHelper::toDouble(VPackSlice const& slice, bool& failed) {
|
|
TRI_ASSERT(!slice.isNone());
|
|
|
|
failed = false;
|
|
switch (slice.type()) {
|
|
case VPackValueType::None:
|
|
case VPackValueType::Null:
|
|
return 0.0;
|
|
case VPackValueType::Bool:
|
|
return (slice.getBoolean() ? 1.0 : 0.0);
|
|
case VPackValueType::Double:
|
|
case VPackValueType::Int:
|
|
case VPackValueType::UInt:
|
|
case VPackValueType::SmallInt:
|
|
return slice.getNumericValue<double>();
|
|
case VPackValueType::String: {
|
|
std::string tmp(slice.copyString());
|
|
try {
|
|
// try converting string to number
|
|
return std::stod(tmp);
|
|
} catch (...) {
|
|
if (tmp.empty()) {
|
|
return 0.0;
|
|
}
|
|
// conversion failed
|
|
}
|
|
break;
|
|
}
|
|
case VPackValueType::Array: {
|
|
VPackValueLength const n = slice.length();
|
|
|
|
if (n == 0) {
|
|
return 0.0;
|
|
} else if (n == 1) {
|
|
return VelocyPackHelper::toDouble(slice.at(0).resolveExternal(), failed);
|
|
}
|
|
break;
|
|
}
|
|
case VPackValueType::External: {
|
|
return VelocyPackHelper::toDouble(slice.resolveExternal(), failed);
|
|
}
|
|
case VPackValueType::Illegal:
|
|
case VPackValueType::Object:
|
|
case VPackValueType::UTCDate:
|
|
case VPackValueType::MinKey:
|
|
case VPackValueType::MaxKey:
|
|
case VPackValueType::Binary:
|
|
case VPackValueType::BCD:
|
|
case VPackValueType::Custom:
|
|
break;
|
|
}
|
|
|
|
failed = true;
|
|
return 0.0;
|
|
}
|
|
|
|
uint64_t VelocyPackHelper::hashByAttributes(
|
|
VPackSlice slice, std::vector<std::string> const& attributes,
|
|
bool docComplete, int& error, std::string const& key) {
|
|
uint64_t hash = TRI_FnvHashBlockInitial();
|
|
error = TRI_ERROR_NO_ERROR;
|
|
slice = slice.resolveExternal();
|
|
if (slice.isObject()) {
|
|
for (auto const& attr : attributes) {
|
|
VPackSlice sub = slice.get(attr).resolveExternal();
|
|
if (sub.isNone()) {
|
|
if (attr == StaticStrings::KeyString && !key.empty()) {
|
|
VPackBuilder temporaryBuilder;
|
|
temporaryBuilder.add(VPackValue(key));
|
|
hash = temporaryBuilder.slice().normalizedHash(hash);
|
|
continue;
|
|
}
|
|
if (!docComplete) {
|
|
error = TRI_ERROR_CLUSTER_NOT_ALL_SHARDING_ATTRIBUTES_GIVEN;
|
|
}
|
|
// Null is equal to None/not present
|
|
sub = VPackSlice::nullSlice();
|
|
}
|
|
hash = sub.normalizedHash(hash);
|
|
}
|
|
}
|
|
return hash;
|
|
}
|
|
|
|
void VelocyPackHelper::SanitizeExternals(VPackSlice const input, VPackBuilder& output) {
|
|
if (input.isExternal()) {
|
|
output.add(input.resolveExternal());
|
|
} else if (input.isObject()) {
|
|
output.openObject();
|
|
for (auto const& it : VPackObjectIterator(input)) {
|
|
output.add(VPackValue(it.key.copyString()));
|
|
SanitizeExternals(it.value, output);
|
|
}
|
|
output.close();
|
|
} else if (input.isArray()) {
|
|
output.openArray();
|
|
for (auto const& it : VPackArrayIterator(input)) {
|
|
SanitizeExternals(it, output);
|
|
}
|
|
output.close();
|
|
} else {
|
|
output.add(input);
|
|
}
|
|
}
|
|
|
|
arangodb::LoggerStream& operator<< (arangodb::LoggerStream& logger,
|
|
VPackSlice const& slice) {
|
|
size_t const cutoff = 100;
|
|
std::string sliceStr(slice.toJson());
|
|
bool longer = sliceStr.size() > cutoff;
|
|
if (longer) {
|
|
logger << sliceStr.substr(cutoff) << "...";
|
|
} else {
|
|
logger << sliceStr;
|
|
}
|
|
return logger;
|
|
}
|