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179 lines
7.9 KiB
Python
179 lines
7.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ImportIntoSpatialite.py
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---------------------
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Date : October 2016
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Copyright : (C) 2016 by Mathieu Pellerin
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Email : nirvn dot asia at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Mathieu Pellerin'
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__date__ = 'October 2016'
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__copyright__ = '(C) 2012, Mathieu Pellerin'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from qgis.core import (QgsDataSourceUri,
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QgsFeatureSink,
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QgsVectorLayerExporter,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterVectorLayer,
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QgsProcessingParameterField,
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QgsProcessingParameterString,
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QgsProcessingParameterBoolean,
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QgsWkbTypes)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
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from processing.tools import spatialite
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class ImportIntoSpatialite(QgisAlgorithm):
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DATABASE = 'DATABASE'
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TABLENAME = 'TABLENAME'
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INPUT = 'INPUT'
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OVERWRITE = 'OVERWRITE'
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CREATEINDEX = 'CREATEINDEX'
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GEOMETRY_COLUMN = 'GEOMETRY_COLUMN'
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LOWERCASE_NAMES = 'LOWERCASE_NAMES'
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DROP_STRING_LENGTH = 'DROP_STRING_LENGTH'
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FORCE_SINGLEPART = 'FORCE_SINGLEPART'
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PRIMARY_KEY = 'PRIMARY_KEY'
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ENCODING = 'ENCODING'
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def group(self):
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return self.tr('Database')
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def __init__(self):
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super().__init__()
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self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT, self.tr('Layer to import')))
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self.addParameter(QgsProcessingParameterVectorLayer(self.DATABASE, self.tr('File database'), False, False))
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self.addParameter(QgsProcessingParameterString(self.TABLENAME, self.tr('Table to import to (leave blank to use layer name)'), optional=True))
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self.addParameter(QgsProcessingParameterField(self.PRIMARY_KEY, self.tr('Primary key field'), self.INPUT, optional=True))
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self.addParameter(QgsProcessingParameterString(self.GEOMETRY_COLUMN, self.tr('Geometry column'), 'geom'))
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self.addParameter(QgsProcessingParameterString(self.ENCODING, self.tr('Encoding'), 'UTF-8', optional=True))
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self.addParameter(QgsProcessingParameterBoolean(self.OVERWRITE, self.tr('Overwrite'), True))
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self.addParameter(QgsProcessingParameterBoolean(self.CREATEINDEX, self.tr('Create spatial index'), True))
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self.addParameter(QgsProcessingParameterBoolean(self.LOWERCASE_NAMES, self.tr('Convert field names to lowercase'), True))
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self.addParameter(QgsProcessingParameterBoolean(self.DROP_STRING_LENGTH, self.tr('Drop length constraints on character fields'), False))
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self.addParameter(QgsProcessingParameterBoolean(self.FORCE_SINGLEPART, self.tr('Create single-part geometries instead of multi-part'), False))
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self.db = None
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self.overwrite = None
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self.createIndex = None
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self.dropStringLength = None
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self.convertLowerCase = None
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self.forceSinglePart = None
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self.primaryKeyField = None
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self.encoding = None
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self.source = None
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self.table = None
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self.providerName = None
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self.geomColumn = None
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def name(self):
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return 'importintospatialite'
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def displayName(self):
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return self.tr('Import into Spatialite')
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def prepareAlgorithm(self, parameters, context, feedback):
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database = self.parameterAsVectorLayer(parameters, self.DATABASE, context)
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databaseuri = database.dataProvider().dataSourceUri()
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uri = QgsDataSourceUri(databaseuri)
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if uri.database() is '':
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if '|layerid' in databaseuri:
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databaseuri = databaseuri[:databaseuri.find('|layerid')]
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uri = QgsDataSourceUri('dbname=\'%s\'' % (databaseuri))
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self.db = spatialite.GeoDB(uri)
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self.overwrite = self.parameterAsBool(parameters, self.OVERWRITE, context)
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self.createIndex = self.parameterAsBool(parameters, self.CREATEINDEX, context)
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self.convertLowerCase = self.parameterAsBool(parameters, self.LOWERCASE_NAMES, context)
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self.dropStringLength = self.parameterAsBool(parameters, self.DROP_STRING_LENGTH, context)
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self.forceSinglePart = self.parameterAsBool(parameters, self.FORCE_SINGLEPART, context)
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self.primaryKeyField = self.parameterAsString(parameters, self.PRIMARY_KEY, context) or 'id'
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self.encoding = self.parameterAsString(parameters, self.ENCODING, context)
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self.source = self.parameterAsSource(parameters, self.INPUT, context)
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self.table = self.parameterAsString(parameters, self.TABLENAME, context)
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if self.table:
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self.table.strip()
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if not self.table or self.table == '':
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self.table = self.source.sourceName()
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self.table = self.table.replace('.', '_')
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self.table = self.table.replace(' ', '').lower()
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self.providerName = 'spatialite'
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self.geomColumn = self.parameterAsString(parameters, self.GEOMETRY_COLUMN, context)
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if not self.geomColumn:
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self.geomColumn = 'geom'
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return True
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def processAlgorithm(self, context, feedback):
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options = {}
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if self.overwrite:
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options['overwrite'] = True
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if self.convertLowerCase:
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options['lowercaseFieldNames'] = True
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self.geomColumn = self.geomColumn.lower()
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if self.dropStringLength:
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options['dropStringConstraints'] = True
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if self.forceSinglePart:
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options['forceSinglePartGeometryType'] = True
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# Clear geometry column for non-geometry tables
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if self.source.wkbType() == QgsWkbTypes.NoGeometry:
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self.geomColumn = None
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uri = self.db.uri
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uri.setDataSource('', self.table, self.geomColumn, '', self.primaryKeyField)
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if self.encoding:
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options['fileEncoding'] = self.encoding
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exporter = QgsVectorLayerExporter(uri.uri(), self.providerName, self.source.fields(),
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self.source.wkbType(), self.source.sourceCrs(), self.overwrite, options)
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if exporter.errorCode() != QgsVectorLayerExporter.NoError:
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raise GeoAlgorithmExecutionException(
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self.tr('Error importing to Spatialite\n{0}').format(exporter.errorMessage()))
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features = self.source.getFeatures()
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total = 100.0 / self.source.featureCount() if self.source.featureCount() else 0
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for current, f in enumerate(features):
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if feedback.isCanceled():
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break
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if not exporter.addFeature(f, QgsFeatureSink.FastInsert):
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feedback.reportError(exporter.errorMessage())
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feedback.setProgress(int(current * total))
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exporter.flushBuffer()
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if exporter.errorCode() != QgsVectorLayerExporter.NoError:
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raise GeoAlgorithmExecutionException(
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self.tr('Error importing to Spatialite\n{0}').format(exporter.errorMessage()))
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if self.geomColumn and self.createIndex:
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self.db.create_spatial_index(self.table, self.geomColumn)
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return True
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def postProcessAlgorithm(self, context, feedback):
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return {}
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