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#include "Variable/VariableCacheController.h"
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#include "Variable/Variable.h"
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#include <unordered_map>
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Q_LOGGING_CATEGORY(LOG_VariableCacheController, "VariableCacheController")
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struct VariableCacheController::VariableCacheControllerPrivate {
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std::unordered_map<std::shared_ptr<Variable>, QVector<SqpDateTime> >
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m_VariableToSqpDateTimeListMap;
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void addInCacheDataByEnd(const SqpDateTime &dateTime, QVector<SqpDateTime> &dateTimeList,
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QVector<SqpDateTime> ¬InCache, int cacheIndex,
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double currentTStart);
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void addInCacheDataByStart(const SqpDateTime &dateTime, QVector<SqpDateTime> &dateTimeList,
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QVector<SqpDateTime> ¬InCache, int cacheIndex,
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double currentTStart);
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void addDateTimeRecurse(const SqpDateTime &dateTime, QVector<SqpDateTime> &dateTimeList,
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int cacheIndex);
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};
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VariableCacheController::VariableCacheController(QObject *parent)
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: QObject{parent}, impl{spimpl::make_unique_impl<VariableCacheControllerPrivate>()}
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{
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}
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void VariableCacheController::addDateTime(std::shared_ptr<Variable> variable,
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const SqpDateTime &dateTime)
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{
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if (variable) {
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auto findVariableIte = impl->m_VariableToSqpDateTimeListMap.find(variable);
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if (findVariableIte == impl->m_VariableToSqpDateTimeListMap.end()) {
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impl->m_VariableToSqpDateTimeListMap[variable].push_back(dateTime);
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}
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else {
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// addDateTime modify the list<SqpDateTime> of the variable in a way to ensure
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// that the list is ordered : l(0) < l(1). We assume also a < b
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// (with a & b of type SqpDateTime) means ts(b) > te(a)
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// The algorithm will try the merge of two interval:
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// - dateTime will be compare with the first interval of the list:
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// A: if it is inferior, it will be inserted and it's finished.
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// B: if it is in intersection, it will be merge then the merged one
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// will be compared to the next interval. The old one is remove from the list
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// C: if it is superior, we do the same with the next interval of the list
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try {
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impl->addDateTimeRecurse(dateTime,
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impl->m_VariableToSqpDateTimeListMap.at(variable), 0);
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}
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catch (const std::out_of_range &e) {
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qCWarning(LOG_VariableCacheController()) << e.what();
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}
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}
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}
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}
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QVector<SqpDateTime>
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VariableCacheController::provideNotInCacheDateTimeList(std::shared_ptr<Variable> variable,
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const SqpDateTime &dateTime)
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{
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auto notInCache = QVector<SqpDateTime>{};
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// This algorithm is recursif. The idea is to localise the start time then the end time in the
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// list of date time request associated to the variable
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// We assume that the list is ordered in a way that l(0) < l(1). We assume also a < b
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// (with a & b of type SqpDateTime) means ts(b) > te(a)
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try {
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impl->addInCacheDataByStart(dateTime, impl->m_VariableToSqpDateTimeListMap.at(variable),
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notInCache, 0, dateTime.m_TStart);
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}
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catch (const std::out_of_range &e) {
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qCWarning(LOG_VariableCacheController()) << e.what();
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}
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return notInCache;
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}
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QVector<SqpDateTime>
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VariableCacheController::dateCacheList(std::shared_ptr<Variable> variable) const noexcept
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{
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try {
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return impl->m_VariableToSqpDateTimeListMap.at(variable);
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}
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catch (const std::out_of_range &e) {
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qCWarning(LOG_VariableCacheController()) << e.what();
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return QVector<SqpDateTime>{};
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}
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}
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void VariableCacheController::VariableCacheControllerPrivate::addDateTimeRecurse(
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const SqpDateTime &dateTime, QVector<SqpDateTime> &dateTimeList, int cacheIndex)
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{
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const auto dateTimeListSize = dateTimeList.count();
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if (cacheIndex >= dateTimeListSize) {
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dateTimeList.push_back(dateTime);
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// there is no anymore interval to compore, we can just push_back it
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return;
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}
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auto currentDateTime = dateTimeList[cacheIndex];
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if (dateTime.m_TEnd < currentDateTime.m_TStart) {
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// The compared one is < to current one compared, we can insert it
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dateTimeList.insert(cacheIndex, dateTime);
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}
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else if (dateTime.m_TStart > currentDateTime.m_TEnd) {
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// The compared one is > to current one compared we can comparet if to the next one
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addDateTimeRecurse(dateTime, dateTimeList, ++cacheIndex);
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}
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else {
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// Merge cases: we need to merge the two interval, remove the old one from the list then
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// rerun the algo from this index with the merged interval
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auto mTStart = std::min(dateTime.m_TStart, currentDateTime.m_TStart);
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auto mTEnd = std::max(dateTime.m_TEnd, currentDateTime.m_TEnd);
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auto mergeDateTime = SqpDateTime{mTStart, mTEnd};
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dateTimeList.remove(cacheIndex);
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addDateTimeRecurse(mergeDateTime, dateTimeList, cacheIndex);
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}
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}
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void VariableCacheController::VariableCacheControllerPrivate::addInCacheDataByEnd(
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const SqpDateTime &dateTime, QVector<SqpDateTime> &dateTimeList,
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QVector<SqpDateTime> ¬InCache, int cacheIndex, double currentTStart)
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{
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const auto dateTimeListSize = dateTimeList.count();
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if (cacheIndex >= dateTimeListSize) {
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if (currentTStart < dateTime.m_TEnd) {
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// te localised after all other interval: The last interval is [currentTsart, te]
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notInCache.push_back(SqpDateTime{currentTStart, dateTime.m_TEnd});
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}
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return;
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}
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auto currentDateTimeJ = dateTimeList[cacheIndex];
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if (dateTime.m_TEnd <= currentDateTimeJ.m_TStart) {
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// te localised between to interval: The last interval is [currentTsart, te]
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notInCache.push_back(SqpDateTime{currentTStart, dateTime.m_TEnd});
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}
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else {
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notInCache.push_back(SqpDateTime{currentTStart, currentDateTimeJ.m_TStart});
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if (dateTime.m_TEnd > currentDateTimeJ.m_TEnd) {
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// te not localised before the current interval: we need to look at the next interval
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addInCacheDataByEnd(dateTime, dateTimeList, notInCache, ++cacheIndex,
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currentDateTimeJ.m_TEnd);
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}
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}
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}
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void VariableCacheController::VariableCacheControllerPrivate::addInCacheDataByStart(
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const SqpDateTime &dateTime, QVector<SqpDateTime> &dateTimeList,
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QVector<SqpDateTime> ¬InCache, int cacheIndex, double currentTStart)
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{
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const auto dateTimeListSize = dateTimeList.count();
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if (cacheIndex >= dateTimeListSize) {
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// ts localised after all other interval: The last interval is [ts, te]
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notInCache.push_back(SqpDateTime{currentTStart, dateTime.m_TEnd});
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return;
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}
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auto currentDateTimeI = dateTimeList[cacheIndex];
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if (currentTStart < currentDateTimeI.m_TStart) {
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// ts localised between to interval: let's localized te
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addInCacheDataByEnd(dateTime, dateTimeList, notInCache, cacheIndex, currentTStart);
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}
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else if (currentTStart < currentDateTimeI.m_TEnd) {
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if (dateTime.m_TEnd > currentDateTimeI.m_TEnd) {
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// ts not localised before the current interval: we need to look at the next interval
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// We can assume now current tstart is the last interval tend, because data between them
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// are
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// in the cache
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addInCacheDataByStart(dateTime, dateTimeList, notInCache, ++cacheIndex,
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currentDateTimeI.m_TEnd);
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}
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}
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else {
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// ts not localised before the current interval: we need to look at the next interval
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addInCacheDataByStart(dateTime, dateTimeList, notInCache, ++cacheIndex, currentTStart);
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}
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}
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void VariableCacheController::displayCache(std::shared_ptr<Variable> variable) const
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{
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auto variableDateTimeList = impl->m_VariableToSqpDateTimeListMap.find(variable);
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if (variableDateTimeList != impl->m_VariableToSqpDateTimeListMap.end()) {
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qCInfo(LOG_VariableCacheController()) << tr("VariableCacheController::displayCache")
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<< variableDateTimeList->second;
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}
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else {
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qCWarning(LOG_VariableCacheController())
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<< tr("Cannot display a variable that is not in the cache");
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}
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}
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