28QString QgsGeometryCheckHoleAlgorithm::name()
const
30 return QStringLiteral(
"checkgeometryhole" );
33QString QgsGeometryCheckHoleAlgorithm::displayName()
const
35 return QObject::tr(
"Holes" );
38QString QgsGeometryCheckHoleAlgorithm::shortDescription()
const
40 return QObject::tr(
"Detects holes inside polygons." );
43QStringList QgsGeometryCheckHoleAlgorithm::tags()
const
45 return QObject::tr(
"check,geometry,hole" ).split(
',' );
48QString QgsGeometryCheckHoleAlgorithm::group()
const
50 return QObject::tr(
"Check geometry" );
53QString QgsGeometryCheckHoleAlgorithm::groupId()
const
55 return QStringLiteral(
"checkgeometry" );
58QString QgsGeometryCheckHoleAlgorithm::shortHelpString()
const
60 return QObject::tr(
"This algorithm checks the holes of polygon geometries.\n"
61 "Holes are errors." );
69QgsGeometryCheckHoleAlgorithm *QgsGeometryCheckHoleAlgorithm::createInstance()
const
71 return new QgsGeometryCheckHoleAlgorithm();
74void QgsGeometryCheckHoleAlgorithm::initAlgorithm(
const QVariantMap &configuration )
76 Q_UNUSED( configuration )
81 QStringLiteral(
"INPUT" ), QObject::tr(
"Input layer" ),
86 QStringLiteral(
"UNIQUE_ID" ), QObject::tr(
"Unique feature identifier" ), QString(), QStringLiteral(
"INPUT" )
97 std::unique_ptr<QgsProcessingParameterNumber> tolerance = std::make_unique<QgsProcessingParameterNumber>(
101 tolerance->setHelp( QObject::tr(
"The \"Tolerance\" advanced parameter defines the numerical precision of geometric operations, "
102 "given as an integer n, meaning that any difference smaller than 10⁻ⁿ (in map units) is considered zero." ) );
103 addParameter( tolerance.release() );
108 mTolerance = parameterAsInt( parameters, QStringLiteral(
"TOLERANCE" ), context );
113QgsFields QgsGeometryCheckHoleAlgorithm::outputFields()
116 fields.
append(
QgsField( QStringLiteral(
"gc_layerid" ), QMetaType::QString ) );
117 fields.
append(
QgsField( QStringLiteral(
"gc_layername" ), QMetaType::QString ) );
118 fields.
append(
QgsField( QStringLiteral(
"gc_partidx" ), QMetaType::Int ) );
119 fields.
append(
QgsField( QStringLiteral(
"gc_ringidx" ), QMetaType::Int ) );
120 fields.
append(
QgsField( QStringLiteral(
"gc_vertidx" ), QMetaType::Int ) );
121 fields.
append(
QgsField( QStringLiteral(
"gc_errorx" ), QMetaType::Double ) );
122 fields.
append(
QgsField( QStringLiteral(
"gc_errory" ), QMetaType::Double ) );
123 fields.
append(
QgsField( QStringLiteral(
"gc_error" ), QMetaType::QString ) );
131 const std::unique_ptr<QgsProcessingFeatureSource> input( parameterAsSource( parameters, QStringLiteral(
"INPUT" ), context ) );
135 QString uniqueIdFieldName( parameterAsString( parameters, QStringLiteral(
"UNIQUE_ID" ), context ) );
136 int uniqueIdFieldIdx = input->fields().indexFromName( uniqueIdFieldName );
137 if ( uniqueIdFieldIdx == -1 )
138 throw QgsProcessingException( QObject::tr(
"Missing field %1 in input layer" ).arg( uniqueIdFieldName ) );
140 const QgsField uniqueIdField = input->fields().at( uniqueIdFieldIdx );
143 fields.
append( uniqueIdField );
145 const std::unique_ptr<QgsFeatureSink> sink_output(
146 parameterAsSink( parameters, QStringLiteral(
"OUTPUT" ), context, dest_output, fields, input->wkbType(), input->sourceCrs() )
149 const std::unique_ptr<QgsFeatureSink> sink_errors(
150 parameterAsSink( parameters, QStringLiteral(
"ERRORS" ), context, dest_errors, fields,
Qgis::WkbType::Point, input->sourceCrs() )
162 QList<QgsGeometryCheckError *> checkErrors;
163 QStringList messages;
167 multiStepFeedback.setCurrentStep( 1 );
169 QMap<QString, QgsFeaturePool *> featurePools;
171 std::unique_ptr<QgsVectorLayer> inputLayer( input->materialize(
QgsFeatureRequest() ) );
173 featurePools.insert( inputLayer->id(), &featurePool );
175 multiStepFeedback.setCurrentStep( 2 );
177 check.collectErrors( featurePools, checkErrors, messages, feedback );
179 multiStepFeedback.setCurrentStep( 3 );
181 const double step { checkErrors.size() > 0 ? 100.0 / checkErrors.size() : 1 };
194 attrs << error->layerId()
195 << error->featureId()
196 << error->vidx().part
197 << error->vidx().ring
198 << error->vidx().vertex
199 << error->location().x()
200 << error->location().y()
201 << error->value().toString()
202 << inputLayer->getFeature( error->featureId() ).attribute( uniqueIdField.
name() );
207 throw QgsProcessingException( writeFeatureError( sink_output.get(), parameters, QStringLiteral(
"OUTPUT" ) ) );
211 throw QgsProcessingException( writeFeatureError( sink_errors.get(), parameters, QStringLiteral(
"ERRORS" ) ) );
214 feedback->
setProgress( 100.0 * step *
static_cast<double>( i ) );
225 outputs.insert( QStringLiteral(
"OUTPUT" ), dest_output );
226 outputs.insert( QStringLiteral(
"ERRORS" ), dest_errors );
@ VectorPoint
Vector point layers.
@ VectorPolygon
Vector polygon layers.
QFlags< ProcessingAlgorithmFlag > ProcessingAlgorithmFlags
Flags indicating how and when an algorithm operates and should be exposed to users.
@ NoThreading
Algorithm is not thread safe and cannot be run in a background thread, e.g. for algorithms which mani...
@ Advanced
Parameter is an advanced parameter which should be hidden from users by default.
Wraps a request for features to a vector layer (or directly its vector data provider).
@ FastInsert
Use faster inserts, at the cost of updating the passed features to reflect changes made at the provid...
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
void setAttributes(const QgsAttributes &attrs)
Sets the feature's attributes.
void setGeometry(const QgsGeometry &geometry)
Set the feature's geometry.
bool isCanceled() const
Tells whether the operation has been canceled already.
void setProgress(double progress)
Sets the current progress for the feedback object.
Encapsulate a field in an attribute table or data source.
Container of fields for a vector layer.
bool append(const QgsField &field, Qgis::FieldOrigin origin=Qgis::FieldOrigin::Provider, int originIndex=-1)
Appends a field.
Base configuration for geometry checks.
This represents an error reported by a geometry check.
static QgsGeometry fromPoint(const QgsPoint &point)
Creates a new geometry from a QgsPoint object.
Point geometry type, with support for z-dimension and m-values.
virtual Qgis::ProcessingAlgorithmFlags flags() const
Returns the flags indicating how and when the algorithm operates and should be exposed to users.
Contains information about the context in which a processing algorithm is executed.
Custom exception class for processing related exceptions.
Base class for providing feedback from a processing algorithm.
virtual void setProgressText(const QString &text)
Sets a progress report text string.
Processing feedback object for multi-step operations.
A feature sink output for processing algorithms.
An input feature source (such as vector layers) parameter for processing algorithms.
A vector layer or feature source field parameter for processing algorithms.
Encapsulates a QGIS project, including sets of map layers and their styles, layouts,...
static QgsProject * instance()
Returns the QgsProject singleton instance.
QgsCoordinateTransformContext transformContext
A feature pool based on a vector data provider.