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Ref T275, Ref T280 hint for timestamp based list if they are already sorted

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This commit is contained in:
Klaus Basan
2018-06-13 16:36:30 +02:00
parent e7cfae4fcc
commit 978fe5eea2
6 changed files with 116 additions and 12 deletions
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52
src/blackmisc/timestampobjectlist.cpp
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@@ -253,14 +253,21 @@ namespace BlackMisc
template <class OBJ, class CONTAINER>
void ITimestampObjectList<OBJ, CONTAINER>::sortOldestFirst()
{
this->container().sort(BlackMisc::Predicates::MemberLess(&OBJ::getMSecsSinceEpoch));
this->container().sort(Predicates::MemberLess(&OBJ::getMSecsSinceEpoch));
}
template<class OBJ, class CONTAINER>
void ITimestampObjectList<OBJ, CONTAINER>::push_frontKeepLatestFirst(const OBJ &value, int maxElements)
void ITimestampObjectList<OBJ, CONTAINER>::push_frontKeepLatestFirst(const OBJ &value, bool replaceSameTimestamp, int maxElements)
{
Q_ASSERT_X(maxElements < 0 || maxElements > 1, Q_FUNC_INFO, "Max.value wrong range");
CONTAINER &c = this->container();
if (replaceSameTimestamp && !c.isEmpty() && c[0].getMSecsSinceEpoch() == value.getMSecsSinceEpoch())
{
c[0] = value;
if (maxElements > 0) { c.truncate(maxElements); }
return;
}
if (maxElements > 0) { c.truncate(maxElements - 1); }
const bool needSort = !c.isEmpty() && value.isOlderThan(c.front());
c.push_front(value);
@@ -270,6 +277,21 @@ namespace BlackMisc
}
}
template<class OBJ, class CONTAINER>
int ITimestampObjectList<OBJ, CONTAINER>::replaceIfSameTimestamp(const OBJ &newObject)
{
int c = 0;
for (OBJ &obj : this->container())
{
if (obj.getMSecsSinceEpoch() == newObject.getMSecsSinceEpoch())
{
obj = newObject;
c++;
}
}
return c;
}
template<class OBJ, class CONTAINER>
bool ITimestampObjectList<OBJ, CONTAINER>::isSortedLatestLast() const
{
@@ -374,10 +396,17 @@ namespace BlackMisc
}
template<class OBJ, class CONTAINER>
void ITimestampWithOffsetObjectList<OBJ, CONTAINER>::push_frontKeepLatestAdjustedFirst(const OBJ &value, int maxElements)
void ITimestampWithOffsetObjectList<OBJ, CONTAINER>::push_frontKeepLatestAdjustedFirst(const OBJ &value, bool replaceSameTimestamp, int maxElements)
{
Q_ASSERT_X(maxElements < 0 || maxElements > 1, Q_FUNC_INFO, "Max.value wrong range");
CONTAINER &c = this->container();
if (replaceSameTimestamp && !c.isEmpty() && c[0].getMSecsSinceEpoch() == value.getMSecsSinceEpoch())
{
c[0] = value;
if (maxElements > 0) { c.truncate(maxElements); }
return;
}
if (maxElements > 0) { c.truncate(maxElements - 1); }
const bool needSort = !c.isEmpty() && value.isOlderThanAdjusted(c.front());
c.push_front(value);
@@ -388,9 +417,9 @@ namespace BlackMisc
}
template<class OBJ, class CONTAINER>
void ITimestampWithOffsetObjectList<OBJ, CONTAINER>::push_frontKeepLatestFirstAdjustOffset(const OBJ &value, int maxElements)
void ITimestampWithOffsetObjectList<OBJ, CONTAINER>::push_frontKeepLatestFirstAdjustOffset(const OBJ &value, bool replaceSameTimestamp, int maxElements)
{
ITimestampObjectList<OBJ, CONTAINER>::push_frontKeepLatestFirst(value, maxElements);
ITimestampWithOffsetObjectList<OBJ, CONTAINER>::push_frontKeepLatestAdjustedFirst(value, replaceSameTimestamp, maxElements);
// now sorted by timestamp
// this reflects normally the incoming order
@@ -432,6 +461,7 @@ namespace BlackMisc
copy.addMsecs(os * i);
this->container().push_back(copy);
}
this->setAdjustedSortHint(ITimestampWithOffsetObjectList::AdjustedTimestampLatestFirst);
}
template<class OBJ, class CONTAINER>
@@ -513,6 +543,10 @@ namespace BlackMisc
OBJ ITimestampWithOffsetObjectList<OBJ, CONTAINER>::latestAdjustedObject() const
{
if (this->container().isEmpty()) { return OBJ(); }
if (m_tsAdjustedSortHint == AdjustedTimestampLatestFirst)
{
return this->container().front();
}
const auto latest = std::max_element(this->container().begin(), this->container().end(), [](const OBJ & a, const OBJ & b) { return a.getAdjustedMSecsSinceEpoch() < b.getAdjustedMSecsSinceEpoch(); });
return *latest;
}
@@ -521,6 +555,10 @@ namespace BlackMisc
OBJ ITimestampWithOffsetObjectList<OBJ, CONTAINER>::oldestAdjustedObject() const
{
if (this->container().isEmpty()) { return OBJ(); }
if (m_tsAdjustedSortHint == AdjustedTimestampLatestFirst)
{
return this->container().back();
}
const auto oldest = std::min_element(this->container().begin(), this->container().end(), [](const OBJ & a, const OBJ & b) { return a.getAdjustedMSecsSinceEpoch() < b.getAdjustedMSecsSinceEpoch(); });
return *oldest;
}
@@ -535,7 +573,8 @@ namespace BlackMisc
template <class OBJ, class CONTAINER>
qint64 ITimestampWithOffsetObjectList<OBJ, CONTAINER>::latestAdjustedTimestampMsecsSinceEpoch() const
{
const QDateTime dt(this->latestTimestamp());
if (this->container().isEmpty()) { return -1; }
const QDateTime dt(this->latestAdjustedTimestamp());
return dt.isValid() ? dt.toMSecsSinceEpoch() : -1;
}
@@ -549,6 +588,7 @@ namespace BlackMisc
template <class OBJ, class CONTAINER>
qint64 ITimestampWithOffsetObjectList<OBJ, CONTAINER>::oldestAdjustedTimestampMsecsSinceEpoch() const
{
if (this->container().isEmpty()) { return -1; }
const QDateTime dt(oldestAdjustedTimestamp());
return dt.isValid() ? dt.toMSecsSinceEpoch() : -1;
}