16#ifndef QGSCACHEINDEX_H 
   17#define QGSCACHEINDEX_H 
Abstract base class for cache indices.
 
virtual bool getCacheIterator(QgsFeatureIterator &featureIterator, const QgsFeatureRequest &featureRequest)=0
Is called when a feature request is issued on a cached layer.
 
QgsAbstractCacheIndex()=default
Constructor for QgsAbstractCacheIndex.
 
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.
 
This class 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