28class QgsMemoryFeatureIterator;
38 ~QgsMemoryProvider()
override;
41 static QString providerKey();
43 static QString providerDescription();
49 QString
dataSourceUri(
bool expandAuthConfig =
true )
const override;
57 bool addAttributes(
const QList<QgsField> &attributes )
override;
63 bool setSubsetString(
const QString &theSQL,
bool updateFeatureCount =
true )
override;
72 QString
name()
const override;
96 QString mSubsetString;
98 friend class QgsMemoryFeatureSource;
107 QgsMemoryProviderMetadata();
108 QIcon
icon()
const override;
SpatialIndexPresence
Enumeration of spatial index presence states.
WkbType
The WKB type describes the number of dimensions a geometry has.
Base class that can be used for any class that is capable of returning features.
This class represents a coordinate reference system (CRS).
Abstract base class for spatial data provider implementations.
virtual QString name() const =0
Returns a provider name.
virtual QgsCoordinateReferenceSystem crs() const =0
Returns the coordinate system for the data source.
QFlags< ReadFlag > ReadFlags
virtual QString subsetString() const
Returns the subset definition string (typically sql) currently in use by the layer and used by the pr...
virtual bool isValid() const =0
Returns true if this is a valid layer.
virtual bool supportsSubsetString() const
Returns true if the provider supports setting of subset strings.
virtual QString dataSourceUri(bool expandAuthConfig=false) const
Gets the data source specification.
virtual QString description() const =0
Returns description.
virtual void updateExtents()
Update the extents of the layer.
virtual bool setSubsetString(const QString &subset, bool updateFeatureCount=true)
Set the subset string used to create a subset of features in the layer.
virtual QgsRectangle extent() const =0
Returns the extent of the layer.
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).
virtual Qgis::SpatialIndexPresence hasSpatialIndex() const
Returns an enum value representing the presence of a valid spatial index on the source,...
Container of fields for a vector layer.
A rectangle specified with double values.
A spatial index for QgsFeature objects.
This is the base class for vector data providers.
virtual bool changeGeometryValues(const QgsGeometryMap &geometry_map)
Changes geometries of existing features.
virtual bool createSpatialIndex()
Creates a spatial index on the datasource (if supported by the provider type).
long long featureCount() const override=0
Number of features in the layer.
virtual QString storageType() const
Returns the permanent storage type for this layer as a friendly name.
virtual bool truncate()
Removes all features from the layer.
virtual void handlePostCloneOperations(QgsVectorDataProvider *source)
Handles any post-clone operations required after this vector data provider was cloned from the source...
QFlags< Capability > Capabilities
virtual QgsAbstractFeatureSource * featureSource() const =0
Returns feature source object that can be used for querying provider's data.
virtual bool changeAttributeValues(const QgsChangedAttributesMap &attr_map)
Changes attribute values of existing features.
virtual bool deleteFeatures(const QgsFeatureIds &id)
Deletes one or more features from the provider.
bool addFeatures(QgsFeatureList &flist, QgsFeatureSink::Flags flags=QgsFeatureSink::Flags()) override
Adds a list of features to the sink.
QgsFields fields() const override=0
Returns the fields associated with this data provider.
Qgis::WkbType wkbType() const override=0
Returns the geometry type which is returned by this layer.
QgsFeatureIterator getFeatures(const QgsFeatureRequest &request=QgsFeatureRequest()) const override=0
Query the provider for features specified in request.
virtual bool addAttributes(const QList< QgsField > &attributes)
Adds new attributes to the provider.
virtual Q_INVOKABLE QgsVectorDataProvider::Capabilities capabilities() const
Returns flags containing the supported capabilities.
virtual bool renameAttributes(const QgsFieldNameMap &renamedAttributes)
Renames existing attributes.
virtual bool deleteAttributes(const QgsAttributeIds &attributes)
Deletes existing attributes from the provider.
QMap< int, QString > QgsFieldNameMap
QMap< QgsFeatureId, QgsGeometry > QgsGeometryMap
QMap< QgsFeatureId, QgsAttributeMap > QgsChangedAttributesMap
QList< QgsFeature > QgsFeatureList
QSet< QgsFeatureId > QgsFeatureIds
qint64 QgsFeatureId
64 bit feature ids negative numbers are used for uncommitted/newly added features
QSet< int > QgsAttributeIds
QMap< QgsFeatureId, QgsFeature > QgsFeatureMap
Setting options for creating vector data providers.