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121 lines
4.8 KiB
Python
Executable File
121 lines
4.8 KiB
Python
Executable File
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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JoinAttributes.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf 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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from builtins import str
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__author__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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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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import os
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from qgis.core import (QgsFeature,
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QgsFeatureSink,
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QgsFeatureRequest,
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QgsProcessingParameterFeatureSource,
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QgsProcessingUtils,
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QgsProcessingParameterField,
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QgsProcessingParameterFeatureSink)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.tools import vector
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class JoinAttributes(QgisAlgorithm):
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OUTPUT = 'OUTPUT'
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INPUT = 'INPUT'
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INPUT_2 = 'INPUT_2'
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FIELD = 'FIELD'
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FIELD_2 = 'FIELD_2'
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def group(self):
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return self.tr('Vector general')
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def __init__(self):
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super().__init__()
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def initAlgorithm(self, config=None):
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self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
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self.tr('Input layer')))
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self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT_2,
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self.tr('Input layer 2')))
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self.addParameter(QgsProcessingParameterField(self.FIELD,
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self.tr('Table field'), parentLayerParameterName=self.INPUT))
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self.addParameter(QgsProcessingParameterField(self.FIELD_2,
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self.tr('Table field 2'), parentLayerParameterName=self.INPUT_2))
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self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT, self.tr('Joined layer')))
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def name(self):
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return 'joinattributestable'
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def displayName(self):
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return self.tr('Join attributes table')
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def processAlgorithm(self, parameters, context, feedback):
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input = self.parameterAsSource(parameters, self.INPUT, context)
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input2 = self.parameterAsSource(parameters, self.INPUT_2, context)
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field = self.parameterAsString(parameters, self.FIELD, context)
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field2 = self.parameterAsString(parameters, self.FIELD_2, context)
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joinField1Index = input.fields().lookupField(field)
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joinField2Index = input2.fields().lookupField(field2)
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outFields = QgsProcessingUtils.combineFields(input.fields(), input2.fields())
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(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
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outFields, input.wkbType(), input.sourceCrs())
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# Cache attributes of input2
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cache = {}
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features = input2.getFeatures(QgsFeatureRequest().setFlags(QgsFeatureRequest.NoGeometry))
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total = 100.0 / input2.featureCount() if input2.featureCount() else 0
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for current, feat in enumerate(features):
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if feedback.isCanceled():
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break
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attrs = feat.attributes()
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joinValue2 = str(attrs[joinField2Index])
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if joinValue2 not in cache:
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cache[joinValue2] = attrs
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feedback.setProgress(int(current * total))
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# Create output vector layer with additional attribute
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outFeat = QgsFeature()
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features = input.getFeatures()
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total = 100.0 / input.featureCount() if input.featureCount() else 0
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for current, feat in enumerate(features):
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if feedback.isCanceled():
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break
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outFeat.setGeometry(feat.geometry())
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attrs = feat.attributes()
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joinValue1 = str(attrs[joinField1Index])
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attrs.extend(cache.get(joinValue1, []))
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outFeat.setAttributes(attrs)
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sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
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feedback.setProgress(int(current * total))
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return {self.OUTPUT: dest_id}
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