Python LayerExporter.exportTable方法代码示例

# 需要导入模块: from sextante.core.LayerExporter import LayerExporter [as 别名]
# 或者: from sextante.core.LayerExporter.LayerExporter import exportTable [as 别名]
 def getSafeExportedTable(self):
     '''Returns not the value entered by the user, but a string with a filename which
     contains the data of this table, but saved in a standard format (currently always
     a dbf file) so that it can be opened by most external applications.
     Works only if the table represented by the parameter value is currently loaded in QGIS.
     Otherwise, it will not perform any export and return the current value string.
     If the current value represents a table in a suitable format, it does not export at all
     and returns that value.
     The table is exported just the first time the method is called. The method can be called
     several times and it will always return the same file, performing the export only the first time.'''
     if self.exported:
         return self.exported
     table = QGisLayers.getObjectFromUri(self.value, False)
     if table:
         self.exported = LayerExporter.exportTable(table)
     else:
         self.exported = self.value
     return self.exported

# 需要导入模块: from sextante.core.LayerExporter import LayerExporter [as 别名]
# 或者: from sextante.core.LayerExporter.LayerExporter import exportTable [as 别名]
    def processAlgorithm(self, progress):
        if SextanteUtils.isWindows():
            path = SagaUtils.sagaPath()
            if path == "":
                raise GeoAlgorithmExecutionException("SAGA folder is not configured.\nPlease configure it before running SAGA algorithms.")
        commands = list()
        self.exportedLayers = {}

        #1: Export rasters to sgrd and vectors to shp
        #   Tables must be in dbf format. We check that.
        if self.resample:
            self.calculateResamplingExtent()
        for param in self.parameters:
            if isinstance(param, ParameterRaster):
                if param.value == None:
                    continue
                value = param.value
                if not value.endswith("sgrd"):
                    commands.append(self.exportRasterLayer(value))
                if self.resample:
                    commands.append(self.resampleRasterLayer(value));
            if isinstance(param, ParameterVector):
                if param.value == None:
                    continue
                layer = QGisLayers.getObjectFromUri(param.value, False)
                if layer:
                    filename = LayerExporter.exportVectorLayer(layer)
                    self.exportedLayers[param.value]=filename
                elif not param.value.endswith("shp"):
                        raise GeoAlgorithmExecutionException("Unsupported file format")
            if isinstance(param, ParameterTable):
                if param.value == None:
                    continue
                table = QGisLayers.getObjectFromUri(param.value, False)
                if table:
                    filename = LayerExporter.exportTable(table)
                    self.exportedLayers[param.value]=filename
                elif not param.value.endswith("shp"):
                        raise GeoAlgorithmExecutionException("Unsupported file format")
            if isinstance(param, ParameterMultipleInput):
                if param.value == None:
                    continue
                layers = param.value.split(";")
                if layers == None or len(layers) == 0:
                    continue
                if param.datatype == ParameterMultipleInput.TYPE_RASTER:
                    for layerfile in layers:
                        if not layerfile.endswith("sgrd"):
                            commands.append(self.exportRasterLayer(layerfile))
                        if self.resample:
                            commands.append(self.resampleRasterLayer(layerfile));
                elif param.datatype == ParameterMultipleInput.TYPE_VECTOR_ANY:
                    for layerfile in layers:
                        layer = QGisLayers.getObjectFromUri(layerfile, False)
                        if layer:
                            filename = LayerExporter.exportVectorLayer(layer)
                            self.exportedLayers[layerfile]=filename
                        elif (not layerfile.endswith("shp")):
                            raise GeoAlgorithmExecutionException("Unsupported file format")

        #2: set parameters and outputs
        if SextanteUtils.isWindows():
            command = self.undecoratedGroup  + " \"" + self.cmdname + "\""
        else:
            command = "lib" + self.undecoratedGroup  + " \"" + self.cmdname + "\""

        for param in self.parameters:
            if param.value is None:
                continue
            if isinstance(param, (ParameterRaster, ParameterVector, ParameterTable)):
                value = param.value
                if value in self.exportedLayers.keys():
                    command+=(" -" + param.name + " \"" + self.exportedLayers[value] + "\"")
                else:
                    command+=(" -" + param.name + " \"" + value + "\"")
            elif isinstance(param, ParameterMultipleInput):
                s = param.value
                for layer in self.exportedLayers.keys():
                    s = s.replace(layer, self.exportedLayers[layer])
                command+=(" -" + param.name + " \"" + s + "\"");
            elif isinstance(param, ParameterBoolean):
                if param.value:
                    command+=(" -" + param.name);
            elif isinstance(param, ParameterFixedTable):
                tempTableFile  = SextanteUtils.getTempFilename("txt")
                f = open(tempTableFile, "w")
                f.write('\t'.join([col for col in param.cols]) + "\n")
                values = param.value.split(",")
                for i in range(0, len(values), 3):
                    s = values[i] + "\t" + values[i+1] + "\t" + values[i+2] + "\n"
                    f.write(s)
                f.close()
                command+=( " -" + param.name + " \"" + tempTableFile + "\"")
            elif isinstance(param, ParameterExtent):
                #'we have to substract/add half cell size, since saga is center based, not corner based
                halfcell = self.getOutputCellsize() / 2
                offset = [halfcell, -halfcell, halfcell, -halfcell]
                values = param.value.split(",")
                for i in range(4):
                    command+=(" -" + self.extentParamNames[i] + " " + str(float(values[i]) + offset[i]));
#.........这里部分代码省略.........