QgsCachedFeatureWriterIterator Class Reference

Uses another iterator as backend and writes features to the cache. More...

#include <qgscachedfeatureiterator.h>

Inheritance diagram for QgsCachedFeatureWriterIterator:

Collaboration diagram for QgsCachedFeatureWriterIterator:

Public Member Functions
	QgsCachedFeatureWriterIterator (QgsVectorLayerCache *vlCache, QgsFeatureRequest featureRequest)
	This constructor creates a feature iterator, which queries the backend and caches retrieved features.
virtual bool	nextFeature (QgsFeature &f)
virtual bool	rewind ()
virtual bool	close ()
Public Member Functions inherited from QgsAbstractFeatureIterator
	QgsAbstractFeatureIterator (const QgsFeatureRequest &request)
	base class constructor - stores the iteration parameters
virtual	~QgsAbstractFeatureIterator ()
	destructor makes sure that the iterator is closed properly

Private Attributes
QgsFeatureIterator	mFeatIt
QgsVectorLayerCache *	mVectorLayerCache
QgsFeatureIds	mFids

Additional Inherited Members
Protected Member Functions inherited from QgsAbstractFeatureIterator
void	ref ()
void	deref ()
Protected Attributes inherited from QgsAbstractFeatureIterator
QgsFeatureRequest	mRequest
bool	mClosed
int	refs

Detailed Description

Uses another iterator as backend and writes features to the cache.

Definition at line 76 of file qgscachedfeatureiterator.h.

Constructor & Destructor Documentation

QgsCachedFeatureWriterIterator::QgsCachedFeatureWriterIterator	(	QgsVectorLayerCache *	vlCache,
		QgsFeatureRequest	featureRequest
	)

This constructor creates a feature iterator, which queries the backend and caches retrieved features.

Parameters

vlCache	The vector layer cache to use
featureRequest	The feature request to answer

Definition at line 54 of file qgscachedfeatureiterator.cpp.

References QgsVectorLayer::getFeatures(), QgsVectorLayerCache::layer(), and mFeatIt.

Member Function Documentation

bool QgsCachedFeatureWriterIterator::close ( )

virtual

Returns

bool

Implements QgsAbstractFeatureIterator.

Definition at line 85 of file qgscachedfeatureiterator.cpp.

References QgsFeatureIterator::close(), and mFeatIt.

bool QgsCachedFeatureWriterIterator::nextFeature ( QgsFeature &  f )

virtual

Parameters

f

Returns

bool

Implements QgsAbstractFeatureIterator.

Definition at line 61 of file qgscachedfeatureiterator.cpp.

References QgsVectorLayerCache::cacheFeature(), QgsFeature::id(), mFeatIt, mFids, QgsAbstractFeatureIterator::mRequest, mVectorLayerCache, QgsFeatureIterator::nextFeature(), and QgsVectorLayerCache::requestCompleted().

bool QgsCachedFeatureWriterIterator::rewind ( )

virtual

Returns

bool

Implements QgsAbstractFeatureIterator.

Definition at line 79 of file qgscachedfeatureiterator.cpp.

References mFeatIt, mFids, and QgsFeatureIterator::rewind().

Member Data Documentation

QgsFeatureIterator QgsCachedFeatureWriterIterator::mFeatIt

private

Definition at line 111 of file qgscachedfeatureiterator.h.

Referenced by close(), nextFeature(), QgsCachedFeatureWriterIterator(), and rewind().

QgsFeatureIds QgsCachedFeatureWriterIterator::mFids

private

Definition at line 113 of file qgscachedfeatureiterator.h.

Referenced by nextFeature(), and rewind().

QgsVectorLayerCache* QgsCachedFeatureWriterIterator::mVectorLayerCache

private

Definition at line 112 of file qgscachedfeatureiterator.h.

Referenced by nextFeature().

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The documentation for this class was generated from the following files:

• /tmp/buildd/qgis-2.0.1/src/core/qgscachedfeatureiterator.h
• /tmp/buildd/qgis-2.0.1/src/core/qgscachedfeatureiterator.cpp