Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4876:884afa149192

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(importer) Style: Remove some empty lines
author Andre Heinecke <aheinecke@intevation.de>
date Fri, 25 Jan 2013 10:43:38 +0100
parents a563e9f58f93
children 852d4c508f33
rev   line source
4872
a563e9f58f93 Improve error handling and unify dbconn for all importers
Andre Heinecke <aheinecke@intevation.de>
parents: 4871
diff changeset
1 try:
a563e9f58f93 Improve error handling and unify dbconn for all importers
Andre Heinecke <aheinecke@intevation.de>
parents: 4871
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2 from osgeo import ogr
a563e9f58f93 Improve error handling and unify dbconn for all importers
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3 except ImportErrror:
a563e9f58f93 Improve error handling and unify dbconn for all importers
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4 import ogr
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5 import osr
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6 import shpimporter
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7
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8 class Importer:
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9
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10 def __init__(self, config, dbconn):
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11 self.config = config
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12 self.dbconn = dbconn
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13 self.river_id = config.river_id
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14 self.dest_srs = osr.SpatialReference()
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15 self.dest_srs.ImportFromEPSG(config.target_srs)
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16
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17 def getKind(self, path):
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18 raise NotImplementedError("Importer.getKind is abstract!")
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19
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20 def getPath(self, base):
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21 raise NotImplementedError("Importer.getPath is abstract!")
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22
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23 def getTablename(self):
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24 raise NotImplementedError("Importer.getTablename is abstract!")
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25
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26 def getName(self):
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27 raise NotImplementedError("Importer.getTablename is abstract!")
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28
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29 def IsFieldSet(self, feat, name):
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30 try:
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31 isset = feat.GetField(name)
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32 return isset is not None
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33 except:
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34 return False
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35
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36
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37 def IsDoubleFieldSet(self, feat, name):
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38 try:
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39 isset = feat.GetFieldAsDouble(name)
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40 return isset is not None
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41 except:
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42 return False
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43
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44 def isShapeRelevant(self, name, path):
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45 return True
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46
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47 def walkOverShapes(self, shape):
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48 (name, path) = shape
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49 if not self.isShapeRelevant(name, path):
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50 shpimporter.INFO("Skip shapefile '%s'" % path)
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51 return
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52
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53 shp = ogr.Open(shape[1])
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54 if shp is None:
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55 shpimporter.ERROR("Shapefile '%s' could not be opened!" % path)
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56 return
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57
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58 shpimporter.INFO("Processing shapefile '%s'" % path)
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59 srcLayer = shp.GetLayerByName(name)
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60
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61 if srcLayer is None:
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62 shpimporter.ERROR("Layer '%s' was not found!" % name)
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63 return
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64
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65 return self.shape2Database(srcLayer, name, path)
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66
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67 def transform(self, feat):
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68 geometry = feat.GetGeometryRef()
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69 src_srs = geometry.GetSpatialReference()
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70
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71 if src_srs is None:
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72 shpimporter.ERROR("No source SRS given! No transformation possible!")
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73 return feat
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74
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75 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
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76 geometry.Transform(transformer)
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77
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78 return feat
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79
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80 def shape2Database(self, srcLayer, name, path):
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81 destLayer = self.dbconn.GetLayerByName(self.getTablename())
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82
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83 if srcLayer is None:
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84 shpimporter.ERROR("Shapefile is None!")
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85 return -1
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86
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87 if destLayer is None:
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88 shpimporter.ERROR("No destination layer given!")
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89 return -1
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90
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91 count = srcLayer.GetFeatureCount()
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92 shpimporter.DEBUG("Try to add %i features to database." % count)
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93
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94 srcLayer.ResetReading()
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95
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96 geomType = -1
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97 success = 0
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98 unsupported = 0
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99 creationFailed = 0
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100 featureDef = destLayer.GetLayerDefn()
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101
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102 for feat in srcLayer:
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103 geom = feat.GetGeometryRef()
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104
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105 if geom is None:
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106 continue
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107
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108 geomType = geom.GetGeometryType()
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109
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110 if self.isGeometryValid(geomType):
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111 newFeat = self.createNewFeature(featureDef,
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112 feat,
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113 name=name,
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114 path=path)
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115
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116 if newFeat is not None:
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117 newFeat.SetField("path", path)
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118 newFeat = self.transform(newFeat)
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119 res = destLayer.CreateFeature(newFeat)
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120 if res is None or res > 0:
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121 shpimporter.ERROR("Unable to insert feature. Error: %r" % res)
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122 else:
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123 success = success + 1
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124 else:
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125 creationFailed = creationFailed + 1
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126 else:
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127 unsupported = unsupported + 1
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128
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129 shpimporter.INFO("Inserted %i features" % success)
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130 shpimporter.INFO("Failed to create %i features" % creationFailed)
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131 shpimporter.INFO("Found %i unsupported features" % unsupported)
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132
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133 try:
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134 if self.config.dry_run > 0:
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135 return geomType
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136 destLayer.CommitTransaction()
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137 except e:
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138 shpimporter.ERROR("Exception while committing transaction.")
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139
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140 return geomType
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