Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4884:b457532dae63

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Importer: Move copy fields into importer class and track imported/unimported fields
author Andre Heinecke <aheinecke@intevation.de>
date Mon, 28 Jan 2013 12:25:24 +0100
parents 82d00b0c7302
children 89a8764cabcc
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
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2 from osgeo import ogr
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3 except ImportErrror:
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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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852d4c508f33 (importer) Try to convert paths to UTF-8 for DB insertion
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7 import utils
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8
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9 class Importer:
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10
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11 def __init__(self, config, dbconn):
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59ca5dab2782 Shape importer: use python's OptionParse to read user specific configuration from command line.
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parents: 2862
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12 self.config = config
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13 self.dbconn = dbconn
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14 self.river_id = config.river_id
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15 self.dest_srs = osr.SpatialReference()
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16 self.dest_srs.ImportFromEPSG(config.target_srs)
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17 self.handled_fields = []
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18
bd9e76e0b55d Improved the python shapefile importer.
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19 def getKind(self, path):
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20 raise NotImplementedError("Importer.getKind is abstract!")
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21
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22 def getPath(self, base):
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23 raise NotImplementedError("Importer.getPath is abstract!")
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24
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25 def getTablename(self):
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26 raise NotImplementedError("Importer.getTablename is abstract!")
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27
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28 def getName(self):
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29 raise NotImplementedError("Importer.getTablename is abstract!")
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30
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31 def IsFieldSet(self, feat, name):
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32 if feat.GetFieldIndex(name) == -1:
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33 return False # Avoids an Error in IsFieldSet
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34 return feat.IsFieldSet(feat.GetFieldIndex(name))
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35
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36 def IsDoubleFieldSet(self, feat, name):
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37 try:
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38 isset = feat.GetFieldAsDouble(name)
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39 return isset is not None
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40 except:
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41 return False
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42
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43 def isShapeRelevant(self, name, path):
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44 return True
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45
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46 def walkOverShapes(self, shape):
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47 (name, path) = shape
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48 if not self.isShapeRelevant(name, path):
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49 shpimporter.INFO("Skip shapefile '%s'" % path)
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50 return
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51
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52 shp = ogr.Open(shape[1])
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53 if shp is None:
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54 shpimporter.ERROR("Shapefile '%s' could not be opened!" % path)
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55 return
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56
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57 shpimporter.INFO("Processing shapefile '%s'" % path)
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58 srcLayer = shp.GetLayerByName(name)
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59
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60 if srcLayer is None:
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61 shpimporter.ERROR("Layer '%s' was not found!" % name)
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62 return
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63
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64 return self.shape2Database(srcLayer, name, path)
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65
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66 def transform(self, feat):
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67 geometry = feat.GetGeometryRef()
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68 src_srs = geometry.GetSpatialReference()
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69
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70 if src_srs is None:
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71 shpimporter.ERROR("No source SRS given! No transformation possible!")
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72 return feat
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73
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74 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
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75 geometry.Transform(transformer)
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76
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77 return feat
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78
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79 def handled(self, field):
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80 """
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81 Register a field or a map of as handled during the import.
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82
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83 There is a warning printed after the import for each unhandled field!
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84 """
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85 if not field in self.handled_fields:
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86 self.handled_fields.append(field)
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87
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88 def copyFields(self, src, target, mapping):
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89 """
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90 Checks the mapping dictonary for key value pairs to
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91 copy from the source to the destination feature.
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92
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93 The Key is the attribute of the source feature to be copied
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94 into the target attribute named by the dict's value.
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95 """
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96 self.handled_fields.extend(mapping.keys())
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97 for key, value in mapping.items():
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98 if src.GetFieldIndex(key) == -1:
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99 continue
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100 # 0 OFTInteger, Simple 32bit integer
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101 # 1 OFTIntegerList, List of 32bit integers
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102 # 2 OFTReal, Double Precision floating point
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103 # 3 OFTRealList, List of doubles
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104 # 4 OFTString, String of ASCII chars
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105 # 5 OFTStringList, Array of strings
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106 # 6 OFTWideString, deprecated
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107 # 7 OFTWideStringList, deprecated
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108 # 8 OFTBinary, Raw Binary data
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109 # 9 OFTDate, Date
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110 # 10 OFTTime, Time
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111 # 11 OFTDateTime, Date and Time
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112 if src.IsFieldSet(src.GetFieldIndex(key)):
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113 if src.GetFieldType(key) == 2:
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114 target.SetField(value, src.GetFieldAsDouble(key))
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115 else:
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116 target.SetField(value, src.GetField(key))
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117
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118 def shape2Database(self, srcLayer, name, path):
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119 destLayer = self.dbconn.GetLayerByName(self.getTablename())
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120
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121 if srcLayer is None:
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122 shpimporter.ERROR("Shapefile is None!")
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123 return -1
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124
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125 if destLayer is None:
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126 shpimporter.ERROR("No destination layer given!")
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127 return -1
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128
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129 count = srcLayer.GetFeatureCount()
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130 shpimporter.DEBUG("Try to add %i features to database." % count)
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131
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132 srcLayer.ResetReading()
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133
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134 geomType = -1
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135 success = 0
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136 unsupported = 0
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137 creationFailed = 0
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138 featureDef = destLayer.GetLayerDefn()
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139
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140 for feat in srcLayer:
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141 geom = feat.GetGeometryRef()
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142
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143 if geom is None:
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144 shpimporter.DEBUG("Unkown Geometry reference for feature")
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145 continue
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146
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147 geomType = geom.GetGeometryType()
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148
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149 if self.isGeometryValid(geomType):
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150 newFeat = self.createNewFeature(featureDef,
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151 feat,
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152 name=name,
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153 path=path)
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154
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155 if newFeat is not None:
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156 newFeat.SetField("path", utils.getUTF8Path(path))
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157 newFeat = self.transform(newFeat)
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158 res = destLayer.CreateFeature(newFeat)
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159 if res is None or res > 0:
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160 shpimporter.ERROR("Unable to insert feature. Error: %r" % res)
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161 else:
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162 success = success + 1
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163 else:
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164 creationFailed = creationFailed + 1
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165 else:
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166 unsupported = unsupported + 1
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167
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168 shpimporter.INFO("Inserted %i features" % success)
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169 shpimporter.INFO("Failed to create %i features" % creationFailed)
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170 shpimporter.INFO("Found %i unsupported features" % unsupported)
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171
4884
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172 unhandled = []
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173 for i in range(0, srcLayer.GetLayerDefn().GetFieldCount()):
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174 act_field = srcLayer.GetLayerDefn().GetFieldDefn(i).GetNameRef()
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175 if not act_field in self.handled_fields:
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176 unhandled.append(act_field)
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177
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178 if len(unhandled):
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179 shpimporter.INFO("Did not import values from fields: %s " % \
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180 " ".join(unhandled))
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181
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182 try:
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183 if self.config.dry_run > 0:
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184 return geomType
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185 destLayer.CommitTransaction()
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186 except e:
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parents: 3654
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187 shpimporter.ERROR("Exception while committing transaction.")
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188
bd9e76e0b55d Improved the python shapefile importer.
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189 return geomType
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