28 auto callback = [ = ](
const QgsFeature & feature )
31 mFeedback->reportError( QObject::tr(
"Encountered a transform error when reprojecting feature with id %1." ).arg( feature.id() ) );
33 mTransformErrorCallback = callback;
39 for (
auto it = mLayersToLoadOnCompletion.constBegin(); it != mLayersToLoadOnCompletion.constEnd(); ++it )
41 delete it.value().postProcessor();
47 mExpressionContext = context;
54 for (
auto it = mLayersToLoadOnCompletion.constBegin(); it != mLayersToLoadOnCompletion.constEnd(); ++it )
56 if ( !layers.contains( it.key() ) || layers.value( it.key() ).postProcessor() != it.value().postProcessor() )
57 delete it.value().postProcessor();
59 mLayersToLoadOnCompletion = layers;
64 if ( mLayersToLoadOnCompletion.contains( layer ) && mLayersToLoadOnCompletion.value( layer ).postProcessor() != details.
postProcessor() )
65 delete mLayersToLoadOnCompletion.value( layer ).postProcessor();
67 mLayersToLoadOnCompletion.insert( layer, details );
72 mInvalidGeometryCheck = check;
73 mUseDefaultInvalidGeometryCallback =
true;
79 if ( mUseDefaultInvalidGeometryCallback )
82 return mInvalidGeometryCallback;
87 const QString sourceName = source ? source->
sourceName() : QString();
92 auto callback = [sourceName](
const QgsFeature & feature )
94 if ( !sourceName.isEmpty() )
95 throw QgsProcessingException( QObject::tr(
"Feature (%1) from “%2” has invalid geometry. Please fix the geometry or change the “Invalid features filtering” option for this input or globally in Processing settings." ).arg( feature.id() ).arg( sourceName ) );
97 throw QgsProcessingException( QObject::tr(
"Feature (%1) has invalid geometry. Please fix the geometry or change the “Invalid features filtering” option for input layers or globally in Processing settings." ).arg( feature.id() ) );
104 auto callback = [ = ](
const QgsFeature & feature )
108 if ( !sourceName.isEmpty() )
109 mFeedback->reportError( QObject::tr(
"Feature (%1) from “%2” has invalid geometry and has been skipped. Please fix the geometry or change the “Invalid features filtering” option for this input or globally in Processing settings." ).arg( feature.id() ).arg( sourceName ) );
111 mFeedback->reportError( QObject::tr(
"Feature (%1) has invalid geometry and has been skipped. Please fix the geometry or change the “Invalid features filtering” option for input layers or globally in Processing settings." ).arg( feature.id() ) );
126 context.mLayersToLoadOnCompletion.clear();
152 return mTemporaryFolderOverride;
157 mTemporaryFolderOverride = folder;
162 return mMaximumThreads;
167 mMaximumThreads = threads;
177 if ( !mEllipsoid.isEmpty() )
178 res.insert( QStringLiteral(
"ellipsoid" ), mEllipsoid );
180 res.insert( QStringLiteral(
"project_path" ), mProject->fileName() );
187 auto escapeIfNeeded = [](
const QString & input ) -> QString
190 const thread_local QRegularExpression nonAlphaNumericRx( QStringLiteral(
"[^a-zA-Z0-9.\\-/_]" ) );
191 if ( nonAlphaNumericRx.match( input ).hasMatch() )
193 QString escaped = input;
194 escaped.replace(
'\'', QLatin1String(
"'\\''" ) );
195 return QStringLiteral(
"'%1'" ).arg( escaped );
208 if ( !mEllipsoid.isEmpty() )
209 res << QStringLiteral(
"--ellipsoid=%1" ).arg( mEllipsoid );
213 res << QStringLiteral(
"--project_path=%1" ).arg( escapeIfNeeded( mProject->fileName() ) );
221 return mCurrentTimeRange;
241 return mDistanceUnit;
246 mDistanceUnit = unit;
261 return mPostProcessor;
266 if ( mPostProcessor && mPostProcessor != processor )
267 delete mPostProcessor;
269 mPostProcessor = processor;
280 if ( ( !forceName && preferFilenameAsLayerName && !layer->
isTemporary() ) || name.isEmpty() )
283 const QString layerName = sourceParts.value( QStringLiteral(
"layerName" ) ).toString();
285 if ( !layerName.isEmpty() )
289 const QString path = sourceParts.value( QStringLiteral(
"path" ) ).toString();
290 if ( !path.isEmpty() )
292 const QFileInfo fi( path );
293 layer->
setName( fi.baseName() );
295 else if ( !name.isEmpty() )
DistanceUnit
Units of distance.
@ Unknown
Unknown distance unit.
@ Unknown
Unknown areal unit.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
void setLoadedLayerStore(QgsMapLayerStore *store)
Sets the destination layer store for any layers loaded during expression evaluation.
InvalidGeometryCheck
Handling of features with invalid geometries.
@ GeometryNoCheck
No invalid geometry checking.
@ GeometryAbortOnInvalid
Close iterator on encountering any features with invalid geometry. This requires a slow geometry vali...
@ GeometrySkipInvalid
Skip any features with invalid geometry. This requires a slow geometry validity check for every featu...
An interface for objects which provide features via a getFeatures method.
virtual QString sourceName() const =0
Returns a friendly display name for the source.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
QgsMapLayer * takeMapLayer(QgsMapLayer *layer)
Takes a layer from the store.
QgsMapLayer * mapLayer(const QString &id) const
Retrieve a pointer to a layer by layer id.
void transferLayersFromStore(QgsMapLayerStore *other)
Transfers all the map layers contained within another map layer store and adds them to this store.
Base class for all map layer types.
virtual bool isTemporary() const
Returns true if the layer is considered a temporary layer.
QString source() const
Returns the source for the layer.
QString providerType() const
Returns the provider type (provider key) for this layer.
void setName(const QString &name)
Set the display name of the layer.
Details for layers to load into projects.
QgsProcessingLayerPostProcessorInterface * postProcessor() const
Layer post-processor.
void setPostProcessor(QgsProcessingLayerPostProcessorInterface *processor)
Sets the layer post-processor.
void setOutputLayerName(QgsMapLayer *layer) const
Sets a layer name to match this output, respecting any local user settings which affect this name.
Contains information about the context in which a processing algorithm is executed.
QgsProcessingContext::Flags flags() const
Returns any flags set in the context.
@ IncludeProjectPath
Include the associated project path argument.
LogLevel
Logging level for algorithms to use when pushing feedback messages.
QgsDateTimeRange currentTimeRange() const
Returns the current time range to use for temporal operations.
void takeResultsFrom(QgsProcessingContext &context)
Takes the results from another context and merges them with the results currently stored in this cont...
QVariantMap exportToMap() const
Exports the context's settings to a variant map.
Qgis::AreaUnit areaUnit() const
Returns the area unit to use for area calculations.
QStringList asQgisProcessArguments(QgsProcessingContext::ProcessArgumentFlags flags=QgsProcessingContext::ProcessArgumentFlags()) const
Returns list of the equivalent qgis_process arguments representing the settings from the context.
QgsMapLayer * getMapLayer(const QString &identifier)
Returns a map layer from the context with a matching identifier.
std::function< void(const QgsFeature &) > invalidGeometryCallback(QgsFeatureSource *source=nullptr) const
Returns the callback function to use when encountering an invalid geometry and invalidGeometryCheck()...
void setMaximumThreads(int threads)
Sets the (optional) number of threads to use when running algorithms.
void setExpressionContext(const QgsExpressionContext &context)
Sets the expression context.
void setLayersToLoadOnCompletion(const QMap< QString, QgsProcessingContext::LayerDetails > &layers)
Sets the map of layers (by ID or datasource) to LayerDetails, to load into the canvas upon completion...
QgsMapLayer * takeResultLayer(const QString &id)
Takes the result map layer with matching id from the context and transfers ownership of it back to th...
void setDistanceUnit(Qgis::DistanceUnit unit)
Sets the unit to use for distance calculations.
void addLayerToLoadOnCompletion(const QString &layer, const QgsProcessingContext::LayerDetails &details)
Adds a layer to load (by ID or datasource) into the canvas upon completion of the algorithm or model.
void setAreaUnit(Qgis::AreaUnit areaUnit)
Sets the unit to use for area calculations.
void setEllipsoid(const QString &ellipsoid)
Sets a specified ellipsoid to use for distance and area calculations.
Qgis::DistanceUnit distanceUnit() const
Returns the distance unit to use for distance calculations.
QgsProcessingContext()
Constructor for QgsProcessingContext.
void setLogLevel(LogLevel level)
Sets the logging level for algorithms to use when pushing feedback messages to users.
QString ellipsoid() const
Returns the ellipsoid to use for distance and area calculations.
void setInvalidGeometryCheck(QgsFeatureRequest::InvalidGeometryCheck check)
Sets the behavior used for checking invalid geometries in input layers.
LogLevel logLevel() const
Returns the logging level for algorithms to use when pushing feedback messages to users.
QgsMapLayerStore * temporaryLayerStore()
Returns a reference to the layer store used for storing temporary layers during algorithm execution.
std::function< void(const QgsFeature &) > defaultInvalidGeometryCallbackForCheck(QgsFeatureRequest::InvalidGeometryCheck check, QgsFeatureSource *source=nullptr) const
Returns the default callback function to use for a particular invalid geometry check.
void setTemporaryFolder(const QString &folder)
Sets the (optional) temporary folder to use when running algorithms.
QString temporaryFolder() const
Returns the (optional) temporary folder to use when running algorithms.
void setCurrentTimeRange(const QgsDateTimeRange ¤tTimeRange)
Sets the current time range to use for temporal operations.
int maximumThreads() const
Returns the (optional) number of threads to use when running algorithms.
Custom exception class for processing related exceptions.
An interface for layer post-processing handlers for execution following a processing algorithm operat...
Utility functions for use with processing classes.
static QgsMapLayer * mapLayerFromString(const QString &string, QgsProcessingContext &context, bool allowLoadingNewLayers=true, QgsProcessingUtils::LayerHint typeHint=QgsProcessingUtils::LayerHint::UnknownType, QgsProcessing::LayerOptionsFlags flags=QgsProcessing::LayerOptionsFlags())
Interprets a string as a map layer within the supplied context.
static const QgsSettingsEntryBool * settingsPreferFilenameAsLayerName
Settings entry prefer filename as layer name.
QVariantMap decodeUri(const QString &providerKey, const QString &uri)
Breaks a provider data source URI into its component paths (e.g.
static QgsProviderRegistry * instance(const QString &pluginPath=QString())
Means of accessing canonical single instance.
T value(const QString &dynamicKeyPart=QString()) const
Returns settings value.
static Q_INVOKABLE QString encodeUnit(Qgis::DistanceUnit unit)
Encodes a distance unit to a string.