def doCheck(self, method, parameters, context, feedback, ignore_ring_self_intersection): flags = QgsGeometry.FlagAllowSelfTouchingHoles if ignore_ring_self_intersection else QgsGeometry.ValidityFlags() source = self.parameterAsSource(parameters, self.INPUT_LAYER, context) if source is None: raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT_LAYER)) (valid_output_sink, valid_output_dest_id) = self.parameterAsSink(parameters, self.VALID_OUTPUT, context, source.fields(), source.wkbType(), source.sourceCrs()) valid_count = 0 invalid_fields = source.fields() invalid_fields.append(QgsField('_errors', QVariant.String, 'string', 255)) (invalid_output_sink, invalid_output_dest_id) = self.parameterAsSink(parameters, self.INVALID_OUTPUT, context, invalid_fields, source.wkbType(), source.sourceCrs()) invalid_count = 0 error_fields = QgsFields() error_fields.append(QgsField('message', QVariant.String, 'string', 255)) (error_output_sink, error_output_dest_id) = self.parameterAsSink(parameters, self.ERROR_OUTPUT, context, error_fields, QgsWkbTypes.Point, source.sourceCrs()) error_count = 0 features = source.getFeatures(QgsFeatureRequest(), QgsProcessingFeatureSource.FlagSkipGeometryValidityChecks) total = 100.0 / source.featureCount() if source.featureCount() else 0 for current, inFeat in enumerate(features): if feedback.isCanceled(): break geom = inFeat.geometry() attrs = inFeat.attributes() valid = True if not geom.isNull() and not geom.isEmpty(): errors = list(geom.validateGeometry(method, flags)) if errors: valid = False reasons = [] for error in errors: errFeat = QgsFeature() error_geom = QgsGeometry.fromPointXY(error.where()) errFeat.setGeometry(error_geom) errFeat.setAttributes([error.what()]) if error_output_sink: error_output_sink.addFeature(errFeat, QgsFeatureSink.FastInsert) error_count += 1 reasons.append(error.what()) reason = "\n".join(reasons) if len(reason) > 255: reason = reason[:252] + '…' attrs.append(reason) outFeat = QgsFeature() outFeat.setGeometry(geom) outFeat.setAttributes(attrs) if valid: if valid_output_sink: valid_output_sink.addFeature(outFeat, QgsFeatureSink.FastInsert) valid_count += 1 else: if invalid_output_sink: invalid_output_sink.addFeature(outFeat, QgsFeatureSink.FastInsert) invalid_count += 1 feedback.setProgress(int(current * total)) results = { self.VALID_COUNT: valid_count, self.INVALID_COUNT: invalid_count, self.ERROR_COUNT: error_count } if valid_output_sink: results[self.VALID_OUTPUT] = valid_output_dest_id if invalid_output_sink: results[self.INVALID_OUTPUT] = invalid_output_dest_id if error_output_sink: results[self.ERROR_OUTPUT] = error_output_dest_id return results