#include <qgsvectorlayerfeatureiterator.h>

Inheritance diagram for QgsVectorLayerFeatureIterator:

Classes
struct	FetchJoinInfo
	Join information prepared for fast attribute id mapping in QgsVectorLayerJoinBuffer::updateFeatureAttributes(). More...

Public Member Functions
	QgsVectorLayerFeatureIterator (QgsVectorLayerFeatureSource *source, bool ownSource, const QgsFeatureRequest &request)
	~QgsVectorLayerFeatureIterator ()
virtual bool	close () override
	end of iterating: free the resources / lock
virtual bool	rewind () override
	reset the iterator to the starting position
Public Member Functions inherited from QgsAbstractFeatureIteratorFromSource< QgsVectorLayerFeatureSource >
	QgsAbstractFeatureIteratorFromSource (QgsVectorLayerFeatureSource *source, bool ownSource, const QgsFeatureRequest &request)
	~QgsAbstractFeatureIteratorFromSource ()
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
virtual bool	nextFeature (QgsFeature &f)
	fetch next feature, return true on success

Protected Member Functions
void	addJoinedAttributes (QgsFeature &f)
void	addVirtualAttributes (QgsFeature &f)
	Adds attributes that don't source from the provider but are added inside QGIS Includes.
virtual bool	fetchFeature (QgsFeature &feature) override
	fetch next feature, return true on success
bool	fetchNextAddedFeature (QgsFeature &f)
bool	fetchNextChangedAttributeFeature (QgsFeature &f)
bool	fetchNextChangedGeomFeature (QgsFeature &f)
bool	nextFeatureFid (QgsFeature &f)
virtual bool	nextFeatureFilterExpression (QgsFeature &f) override
	Overrides default method as we only need to filter features in the edit buffer while for others filtering is left to the provider implementation.
void	prepareExpressions ()
void	prepareJoins ()
virtual bool	prepareSimplification (const QgsSimplifyMethod &simplifyMethod) override
	Setup the simplification of geometries to fetch using the specified simplify method.
void	rewindEditBuffer ()
void	updateChangedAttributes (QgsFeature &f)
	Update feature with uncommited attribute updates.
void	updateFeatureGeometry (QgsFeature &f)
	Update feature with uncommited geometry updates.
void	useAddedFeature (const QgsFeature &src, QgsFeature &f)
void	useChangedAttributeFeature (QgsFeatureId fid, const QgsGeometry &geom, QgsFeature &f)
Protected Member Functions inherited from QgsAbstractFeatureIteratorFromSource< QgsVectorLayerFeatureSource >
void	iteratorClosed ()
	to be called by from subclass in close()
Protected Member Functions inherited from QgsAbstractFeatureIterator
void	deref ()
	remove reference, delete if refs == 0
virtual bool	nextFeatureFilterFids (QgsFeature &f)
	By default, the iterator will fetch all features and check if the id is in the request.
void	ref ()
	add reference

Protected Attributes
QgsFeatureIterator	mChangedFeaturesIterator
QgsFeatureRequest	mChangedFeaturesRequest
QMap< int, QgsExpression * >	mExpressionFieldInfo
QgsFeatureMap::ConstIterator	mFetchAddedFeaturesIt
QgsGeometryMap::ConstIterator	mFetchChangedGeomIt
QSet< QgsFeatureId >	mFetchConsidered
bool	mFetchedFid
QMap< const QgsVectorJoinInfo *, FetchJoinInfo >	mFetchJoinInfo
	information about joins used in the current select() statement.
bool	mHasVirtualAttributes
QgsFeatureIterator	mProviderIterator
QgsFeatureRequest	mProviderRequest
Protected Attributes inherited from QgsAbstractFeatureIteratorFromSource< QgsVectorLayerFeatureSource >
bool	mOwnSource
QgsVectorLayerFeatureSource *	mSource
Protected Attributes inherited from QgsAbstractFeatureIterator
bool	mClosed
	Set to true, as soon as the iterator is closed.
QgsFeatureRequest	mRequest
	A copy of the feature request.
int	refs
	reference counting (to allow seamless copying of QgsFeatureIterator instances)

Detailed Description

Definition at line 69 of file qgsvectorlayerfeatureiterator.h.

Constructor & Destructor Documentation

QgsVectorLayerFeatureIterator::QgsVectorLayerFeatureIterator	(	QgsVectorLayerFeatureSource *	source,
		bool	ownSource,
		const QgsFeatureRequest &	request
	)

Definition at line 88 of file qgsvectorlayerfeatureiterator.cpp.

QgsVectorLayerFeatureIterator::~QgsVectorLayerFeatureIterator ( )

Definition at line 152 of file qgsvectorlayerfeatureiterator.cpp.

Member Function Documentation

void QgsVectorLayerFeatureIterator::addJoinedAttributes ( QgsFeature & f )

protected

Definition at line 527 of file qgsvectorlayerfeatureiterator.cpp.

void QgsVectorLayerFeatureIterator::addVirtualAttributes ( QgsFeature & f )

protected

Adds attributes that don't source from the provider but are added inside QGIS Includes.

Joined fields
Expression fields

Parameters

f	The feature will be modified

Definition at line 547 of file qgsvectorlayerfeatureiterator.cpp.

bool QgsVectorLayerFeatureIterator::close ( )

overridevirtual

end of iterating: free the resources / lock

Implements QgsAbstractFeatureIterator.

Definition at line 256 of file qgsvectorlayerfeatureiterator.cpp.

bool QgsVectorLayerFeatureIterator::fetchFeature ( QgsFeature & feature )

overrideprotectedvirtual

fetch next feature, return true on success

Implements QgsAbstractFeatureIterator.

Definition at line 164 of file qgsvectorlayerfeatureiterator.cpp.

bool QgsVectorLayerFeatureIterator::fetchNextAddedFeature ( QgsFeature & f )

protected

Definition at line 272 of file qgsvectorlayerfeatureiterator.cpp.

bool QgsVectorLayerFeatureIterator::fetchNextChangedAttributeFeature ( QgsFeature & f )

protected

Definition at line 352 of file qgsvectorlayerfeatureiterator.cpp.

bool QgsVectorLayerFeatureIterator::fetchNextChangedGeomFeature ( QgsFeature & f )

protected

Definition at line 325 of file qgsvectorlayerfeatureiterator.cpp.

bool QgsVectorLayerFeatureIterator::nextFeatureFid ( QgsFeature & f )

protected

Definition at line 716 of file qgsvectorlayerfeatureiterator.cpp.

virtual bool QgsVectorLayerFeatureIterator::nextFeatureFilterExpression ( QgsFeature & f )

inlineoverrideprotectedvirtual

Overrides default method as we only need to filter features in the edit buffer while for others filtering is left to the provider implementation.

Reimplemented from QgsAbstractFeatureIterator.

Definition at line 88 of file qgsvectorlayerfeatureiterator.h.

void QgsVectorLayerFeatureIterator::prepareExpressions ( )

protected

Definition at line 490 of file qgsvectorlayerfeatureiterator.cpp.

void QgsVectorLayerFeatureIterator::prepareJoins ( )

protected

Definition at line 435 of file qgsvectorlayerfeatureiterator.cpp.

bool QgsVectorLayerFeatureIterator::prepareSimplification ( const QgsSimplifyMethod & simplifyMethod )

overrideprotectedvirtual

Setup the simplification of geometries to fetch using the specified simplify method.

Reimplemented from QgsAbstractFeatureIterator.

Definition at line 569 of file qgsvectorlayerfeatureiterator.cpp.

bool QgsVectorLayerFeatureIterator::rewind ( )

overridevirtual

reset the iterator to the starting position

Implements QgsAbstractFeatureIterator.

Definition at line 238 of file qgsvectorlayerfeatureiterator.cpp.

void QgsVectorLayerFeatureIterator::rewindEditBuffer ( )

protected

Definition at line 425 of file qgsvectorlayerfeatureiterator.cpp.

void QgsVectorLayerFeatureIterator::updateChangedAttributes ( QgsFeature & f )

protected

Update feature with uncommited attribute updates.

Definition at line 757 of file qgsvectorlayerfeatureiterator.cpp.

void QgsVectorLayerFeatureIterator::updateFeatureGeometry ( QgsFeature & f )

protected

Update feature with uncommited geometry updates.

Definition at line 779 of file qgsvectorlayerfeatureiterator.cpp.

void QgsVectorLayerFeatureIterator::useAddedFeature	(	const QgsFeature &	src,
		QgsFeature &	f
	)

protected

Definition at line 296 of file qgsvectorlayerfeatureiterator.cpp.

void QgsVectorLayerFeatureIterator::useChangedAttributeFeature	(	QgsFeatureId	fid,
		const QgsGeometry &	geom,
		QgsFeature &	f
	)

protected

Definition at line 380 of file qgsvectorlayerfeatureiterator.cpp.

Member Data Documentation

QgsFeatureIterator QgsVectorLayerFeatureIterator::mChangedFeaturesIterator

protected

Definition at line 97 of file qgsvectorlayerfeatureiterator.h.

QgsFeatureRequest QgsVectorLayerFeatureIterator::mChangedFeaturesRequest

protected

Definition at line 96 of file qgsvectorlayerfeatureiterator.h.

QMap<int, QgsExpression*> QgsVectorLayerFeatureIterator::mExpressionFieldInfo

protected

Definition at line 153 of file qgsvectorlayerfeatureiterator.h.

QgsFeatureMap::ConstIterator QgsVectorLayerFeatureIterator::mFetchAddedFeaturesIt

protected

Definition at line 103 of file qgsvectorlayerfeatureiterator.h.

QgsGeometryMap::ConstIterator QgsVectorLayerFeatureIterator::mFetchChangedGeomIt

protected

Definition at line 102 of file qgsvectorlayerfeatureiterator.h.

QSet<QgsFeatureId> QgsVectorLayerFeatureIterator::mFetchConsidered

protected

Definition at line 101 of file qgsvectorlayerfeatureiterator.h.

bool QgsVectorLayerFeatureIterator::mFetchedFid

protected

Definition at line 105 of file qgsvectorlayerfeatureiterator.h.

QMap<const QgsVectorJoinInfo*, FetchJoinInfo> QgsVectorLayerFeatureIterator::mFetchJoinInfo

protected

information about joins used in the current select() statement.

Allows faster mapping of attribute ids compared to mVectorJoins

Definition at line 151 of file qgsvectorlayerfeatureiterator.h.

bool QgsVectorLayerFeatureIterator::mHasVirtualAttributes

protected

Definition at line 155 of file qgsvectorlayerfeatureiterator.h.

QgsFeatureIterator QgsVectorLayerFeatureIterator::mProviderIterator

protected

Definition at line 95 of file qgsvectorlayerfeatureiterator.h.

QgsFeatureRequest QgsVectorLayerFeatureIterator::mProviderRequest

protected

Definition at line 94 of file qgsvectorlayerfeatureiterator.h.

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

/tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgsvectorlayerfeatureiterator.h
/tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgsvectorlayerfeatureiterator.cpp

Classes

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation