flightsimulatorplatfrom/pilotclient
1
0
Fork 0
mirror of https://github.com/swift-project/pilotclient.git synced 2026-04-26 02:35:38 +08:00
Code Issues Packages Projects Releases Wiki Activity

refs #568, find max key value

Browse Source 
(useful when key is integer to find latest values)
This commit is contained in:
Klaus Basan
2016-01-15 02:15:46 +01:00
parent 6802880e52
commit 4c92ab0444
2 changed files with 37 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
src/blackmisc/datastoreobjectlist.cpp
View File

@@ -30,6 +30,23 @@ namespace BlackMisc
return this->container().findFirstByOrDefault(&OBJ::getDbKey, key, notFound); return this->container().findFirstByOrDefault(&OBJ::getDbKey, key, notFound);
} }
template <class OBJ, class CONTAINER, typename KEYTYPE>
OBJ IDatastoreObjectList<OBJ, CONTAINER, KEYTYPE>::maxKeyObject() const
{
if (this->container().isEmpty()) { return OBJ(); }
const OBJ max = *std::max_element(this->container().begin(), this->container().end(), [](const OBJ & obj1, const OBJ & obj2)
{
bool v1 = obj1.hasValidDbKey();
bool v2 = obj2.hasValidDbKey();
if (v1 && v2)
{
return obj1.getDbKey() < obj2.getDbKey();
}
return v2;
});
return max;
}
template <class OBJ, class CONTAINER, typename KEYTYPE> template <class OBJ, class CONTAINER, typename KEYTYPE>
void IDatastoreObjectList<OBJ, CONTAINER, KEYTYPE>::sortByKey() void IDatastoreObjectList<OBJ, CONTAINER, KEYTYPE>::sortByKey()
{ {
@@ -48,6 +65,20 @@ namespace BlackMisc
return keys; return keys;
} }
template <class OBJ, class CONTAINER, typename KEYTYPE>
KEYTYPE IDatastoreObjectList<OBJ, CONTAINER, KEYTYPE>::getMaxKey(bool *ok) const
{
QList<KEYTYPE> keys(this->toDbKeyList());
if (keys.isEmpty())
{
if (ok) { *ok = false; }
return KEYTYPE();
}
KEYTYPE max = *std::max_element(keys.begin(), keys.end());
if (ok) { *ok = true; }
return max;
}
template <class OBJ, class CONTAINER, typename KEYTYPE> template <class OBJ, class CONTAINER, typename KEYTYPE>
int IDatastoreObjectList<OBJ, CONTAINER, KEYTYPE>::removeObjectsWithKeys(const QList<KEYTYPE> &keys) int IDatastoreObjectList<OBJ, CONTAINER, KEYTYPE>::removeObjectsWithKeys(const QList<KEYTYPE> &keys)
{ {

6
src/blackmisc/datastoreobjectlist.h
View File

@@ -28,12 +28,18 @@ namespace BlackMisc
//! Object with key, notFound otherwise //! Object with key, notFound otherwise
OBJ findByKey(KEYTYPE key, const OBJ &notFound = OBJ()) const; OBJ findByKey(KEYTYPE key, const OBJ &notFound = OBJ()) const;
//! Object with max.key
OBJ maxKeyObject() const;
//! Sort by timestamp //! Sort by timestamp
void sortByKey(); void sortByKey();
//! All keys as list //! All keys as list
QList<KEYTYPE> toDbKeyList() const; QList<KEYTYPE> toDbKeyList() const;
//! Max.key value (making sense with integer key)
KEYTYPE getMaxKey(bool *ok = nullptr) const;
//! Remove objects with key //! Remove objects with key
int removeObjectsWithKeys(const QList<KEYTYPE> &keys); int removeObjectsWithKeys(const QList<KEYTYPE> &keys);