QgsVectorLayerFeatureSource::QgsVectorLayerFeatureSource( const QgsVectorLayer *layer )
{
QMutexLocker locker( &layer->mFeatureSourceConstructorMutex );
mProviderFeatureSource = layer->dataProvider()->featureSource();
mFields = layer->fields();
mId = layer->id();
// update layer's join caches if necessary
if ( layer->mJoinBuffer->containsJoins() )
layer->mJoinBuffer->createJoinCaches();
mJoinBuffer = layer->mJoinBuffer->clone();
mExpressionFieldBuffer = new QgsExpressionFieldBuffer( *layer->mExpressionFieldBuffer );
mCrs = layer->crs();
mHasEditBuffer = layer->editBuffer();
if ( mHasEditBuffer )
{
#if 0
// TODO[MD]: after merge
if ( request.filterType() == QgsFeatureRequest::FilterFid )
{
// only copy relevant parts
if ( L->editBuffer()->addedFeatures().contains( request.filterFid() ) )
mAddedFeatures.insert( request.filterFid(), L->editBuffer()->addedFeatures()[ request.filterFid()] );
if ( L->editBuffer()->changedGeometries().contains( request.filterFid() ) )
mChangedGeometries.insert( request.filterFid(), L->editBuffer()->changedGeometries()[ request.filterFid()] );
if ( L->editBuffer()->deletedFeatureIds().contains( request.filterFid() ) )
mDeletedFeatureIds.insert( request.filterFid() );
if ( L->editBuffer()->changedAttributeValues().contains( request.filterFid() ) )
mChangedAttributeValues.insert( request.filterFid(), L->editBuffer()->changedAttributeValues()[ request.filterFid()] );
if ( L->editBuffer()->changedAttributeValues().contains( request.filterFid() ) )
mChangedFeaturesRequest.setFilterFids( QgsFeatureIds() << request.filterFid() );
}
else
{
#endif
mAddedFeatures = QgsFeatureMap( layer->editBuffer()->addedFeatures() );
mChangedGeometries = QgsGeometryMap( layer->editBuffer()->changedGeometries() );
mDeletedFeatureIds = QgsFeatureIds( layer->editBuffer()->deletedFeatureIds() );
mChangedAttributeValues = QgsChangedAttributesMap( layer->editBuffer()->changedAttributeValues() );
mAddedAttributes = QList<QgsField>( layer->editBuffer()->addedAttributes() );
mDeletedAttributeIds = QgsAttributeList( layer->editBuffer()->deletedAttributeIds() );
#if 0
}
#endif
}
std::unique_ptr< QgsExpressionContextScope > layerScope( QgsExpressionContextUtils::layerScope( layer ) );
mLayerScope = *layerScope;
}
QgsVectorLayerFeatureIterator::QgsVectorLayerFeatureIterator( QgsVectorLayer* layer, const QgsFeatureRequest& request )
: QgsAbstractFeatureIterator( request ), L( layer )
{
QgsVectorLayerJoinBuffer* joinBuffer = L->mJoinBuffer;
if ( L->editBuffer() )
{
mAddedFeatures = QgsFeatureMap( L->editBuffer()->addedFeatures() );
mChangedGeometries = QgsGeometryMap( L->editBuffer()->changedGeometries() );
mDeletedFeatureIds = QgsFeatureIds( L->editBuffer()->deletedFeatureIds() );
mChangedAttributeValues = QgsChangedAttributesMap( L->editBuffer()->changedAttributeValues() );
mAddedAttributes = QList<QgsField>( L->editBuffer()->addedAttributes() );
mDeletedAttributeIds = QgsAttributeList( L->editBuffer()->deletedAttributeIds() );
}
// prepare joins: may add more attributes to fetch (in order to allow join)
if ( joinBuffer->containsJoins() )
prepareJoins();
// by default provider's request is the same
mProviderRequest = mRequest;
if ( mProviderRequest.flags() & QgsFeatureRequest::SubsetOfAttributes )
{
// prepare list of attributes to match provider fields
QgsAttributeList providerSubset;
QgsAttributeList subset = mProviderRequest.subsetOfAttributes();
const QgsFields &pendingFields = L->pendingFields();
int nPendingFields = pendingFields.count();
for ( int i = 0; i < subset.count(); ++i )
{
int attrIndex = subset[i];
if ( attrIndex < 0 || attrIndex >= nPendingFields ) continue;
if ( L->pendingFields().fieldOrigin( attrIndex ) == QgsFields::OriginProvider )
providerSubset << L->pendingFields().fieldOriginIndex( attrIndex );
}
mProviderRequest.setSubsetOfAttributes( providerSubset );
}
if ( request.filterType() == QgsFeatureRequest::FilterFid )
{
mFetchedFid = false;
}
else // no filter or filter by rect
{
mProviderIterator = L->dataProvider()->getFeatures( mProviderRequest );
rewindEditBuffer();
}
}
QgsVectorLayerFeatureSource::QgsVectorLayerFeatureSource( QgsVectorLayer *layer )
: mCrsId( 0 )
{
mProviderFeatureSource = layer->dataProvider()->featureSource();
mFields = layer->fields();
mJoinBuffer = layer->mJoinBuffer->clone();
mExpressionFieldBuffer = new QgsExpressionFieldBuffer( *layer->mExpressionFieldBuffer );
mCrsId = layer->crs().srsid();
mCanBeSimplified = layer->hasGeometryType() && layer->geometryType() != QGis::Point;
mHasEditBuffer = layer->editBuffer();
if ( mHasEditBuffer )
{
#if 0
// TODO[MD]: after merge
if ( request.filterType() == QgsFeatureRequest::FilterFid )
{
// only copy relevant parts
if ( L->editBuffer()->addedFeatures().contains( request.filterFid() ) )
mAddedFeatures.insert( request.filterFid(), L->editBuffer()->addedFeatures()[ request.filterFid()] );
if ( L->editBuffer()->changedGeometries().contains( request.filterFid() ) )
mChangedGeometries.insert( request.filterFid(), L->editBuffer()->changedGeometries()[ request.filterFid()] );
if ( L->editBuffer()->deletedFeatureIds().contains( request.filterFid() ) )
mDeletedFeatureIds.insert( request.filterFid() );
if ( L->editBuffer()->changedAttributeValues().contains( request.filterFid() ) )
mChangedAttributeValues.insert( request.filterFid(), L->editBuffer()->changedAttributeValues()[ request.filterFid()] );
if ( L->editBuffer()->changedAttributeValues().contains( request.filterFid() ) )
mChangedFeaturesRequest.setFilterFids( QgsFeatureIds() << request.filterFid() );
}
else
{
#endif
mAddedFeatures = QgsFeatureMap( layer->editBuffer()->addedFeatures() );
mChangedGeometries = QgsGeometryMap( layer->editBuffer()->changedGeometries() );
mDeletedFeatureIds = QgsFeatureIds( layer->editBuffer()->deletedFeatureIds() );
mChangedAttributeValues = QgsChangedAttributesMap( layer->editBuffer()->changedAttributeValues() );
mAddedAttributes = QList<QgsField>( layer->editBuffer()->addedAttributes() );
mDeletedAttributeIds = QgsAttributeList( layer->editBuffer()->deletedAttributeIds() );
#if 0
}
#endif
}
}
