16#ifndef QGSCACHEINDEX_H
17#define QGSCACHEINDEX_H
virtual bool getCacheIterator(QgsFeatureIterator &featureIterator, const QgsFeatureRequest &featureRequest)=0
Is called when a feature request is issued on a cached layer.
QgsAbstractCacheIndex()=default
virtual void requestCompleted(const QgsFeatureRequest &featureRequest, const QgsFeatureIds &fids)
Implement this method to update the the indices, in case you need information contained by the reques...
virtual ~QgsAbstractCacheIndex()=default
virtual void flush()=0
Sometimes, the whole cache changes its state and its easier to just withdraw everything.
virtual void flushFeature(QgsFeatureId fid)=0
Is called whenever a feature is removed from the cache.
Wrapper for iterator of features from vector data provider or vector layer.
Wraps a request for features to a vector layer (or directly its vector data provider).
QSet< QgsFeatureId > QgsFeatureIds
qint64 QgsFeatureId
64 bit feature ids negative numbers are used for uncommitted/newly added features