Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 5263:db341e37d194

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ImportWst: Doc and getters.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 13 Mar 2013 10:05:47 +0100
parents b3a15fa3d88e
children 90f1c5f67698
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:
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f1c01fecf194 Fix imports of ogr, this removes a warning in gdal 1.9 but keeps
Andre Heinecke <aheinecke@intevation.de>
parents: 5001
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2 from osgeo import ogr, osr
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c5187ab9f571 Fix Syntax Errror
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3 except ImportError:
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4 import ogr, osr
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852d4c508f33 (importer) Try to convert paths to UTF-8 for DB insertion
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5 import utils
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6 import re
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7 import logging
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8
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9 logger = logging.getLogger("importer")
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10
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11 class Importer:
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12
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13 def __init__(self, river_id, dbconn, dry_run):
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14 self.river_id = river_id
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15 self.dbconn = dbconn
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16 self.dry_run = dry_run
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17 self.dest_srs = osr.SpatialReference()
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18 self.dest_srs.ImportFromEPSG(31467)
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19 self.handled_fields = []
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20 self.tracking_import = False
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21 self.srcLayer = None
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22
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23 def getKind(self, path):
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24 raise NotImplementedError("Importer.getKind is abstract!")
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25
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26 def getPath(self, base):
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27 raise NotImplementedError("Importer.getPath is abstract!")
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28
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29 def getTablename(self):
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30 raise NotImplementedError("Importer.getTablename is abstract!")
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31
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32 def getName(self):
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33 raise NotImplementedError("Importer.getName is abstract!")
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34
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35 def isGeometryValid(self, geomType):
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36 raise NotImplementedError("Importer.isGeometryValid is abstract!")
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37
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38 def createNewFeature(self, featureDef, feat, **args):
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39 raise NotImplementedError("Importer.createNewFeature is abstract!")
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40
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41 def IsFieldSet(self, feat, name):
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42 if not name:
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43 return False
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44 if feat.GetFieldIndex(name) == -1:
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45 return False # Avoids an Error in IsFieldSet
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46 return feat.IsFieldSet(feat.GetFieldIndex(name))
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47
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48 def searchField(self, regex):
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49 """
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50 Searches for a field in the current src layer that matches
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51 the expression regex.
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52 Throws an exception if more than one field matches
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53 @param feat: The feature to search for attributes
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54 @param regex: The regex to look for
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55
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56 @returns: The field name as a string
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57 """
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58
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59 if not hasattr(self.srcLayer, "fieldnames"):
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60 self.srcLayer.fieldnames = []
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61 for i in range(0, self.srcLayer.GetLayerDefn().GetFieldCount()):
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62 self.srcLayer.fieldnames.append(
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63 self.srcLayer.GetLayerDefn().GetFieldDefn(i).GetNameRef())
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64
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65 result = None
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66 for name in self.srcLayer.fieldnames:
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67 match = re.match(regex, name, re.IGNORECASE)
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68 if match:
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69 if result:
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70 raise Exception("More than one field matches: %s" % regex)
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71 else:
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72 result = match.group(0)
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73 return result
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74
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75 def IsDoubleFieldSet(self, feat, name):
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76 try:
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77 isset = feat.GetFieldAsDouble(name)
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78 return isset is not None
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79 except:
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80 return False
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81
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82 def isShapeRelevant(self, name, path):
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83 return True
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84
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85 def walkOverShapes(self, shape):
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86 (name, path) = shape
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87
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88 shp = ogr.Open(shape[1])
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89 if shp is None:
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90 logger.error("Shapefile '%s' could not be opened!" % path)
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91 return
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92
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93 if not self.isShapeRelevant(name, path):
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94 logger.info("Skip shapefile: '%s' of Type: %s" % (path,
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95 utils.getWkbString(shp.GetLayerByName(name).GetGeomType())))
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96 return
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97
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98
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99 logger.info("Processing shapefile '%s'" % path)
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100 srcLayer = shp.GetLayerByName(name)
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101
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102 if srcLayer is None:
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103 logger.error("Layer '%s' was not found!" % name)
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104 return
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105
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106 return self.shape2Database(srcLayer, name, path)
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107
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108 def transform(self, feat):
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109 geometry = feat.GetGeometryRef()
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110 src_srs = geometry.GetSpatialReference()
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111
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112 if src_srs is None:
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113 logger.error("No source SRS given! No transformation possible!")
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114 return feat
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115
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116 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
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117 if geometry.Transform(transformer):
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118 return None
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119
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120 return feat
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121
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122 def handled(self, field):
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123 """
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124 Register a field or a map of as handled during the import.
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125
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126 There is a warning printed after the import for each unhandled field!
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127 """
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128 if not field in self.handled_fields:
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129 self.handled_fields.append(field)
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130
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131 def copyFields(self, src, target, mapping):
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132 """
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133 Checks the mapping dictonary for key value pairs to
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134 copy from the source to the destination feature.
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135 The keys can be reguar expressions that are matched
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136 agains the source fieldnames
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137
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diff changeset
138 The Key is the attribute of the source feature to be copied
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139 into the target attribute named by the dict's value.
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140 """
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141 self.tracking_import = True
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142 for key, value in mapping.items():
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143 realname = self.searchField(key)
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144 if realname == None:
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145 continue
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146 if not realname in self.handled_fields:
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147 self.handled_fields.append(realname)
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148 # 0 OFTInteger, Simple 32bit integer
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149 # 1 OFTIntegerList, List of 32bit integers
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150 # 2 OFTReal, Double Precision floating point
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151 # 3 OFTRealList, List of doubles
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152 # 4 OFTString, String of ASCII chars
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153 # 5 OFTStringList, Array of strings
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154 # 6 OFTWideString, deprecated
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155 # 7 OFTWideStringList, deprecated
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156 # 8 OFTBinary, Raw Binary data
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157 # 9 OFTDate, Date
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158 # 10 OFTTime, Time
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159 # 11 OFTDateTime, Date and Time
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160 if src.IsFieldSet(src.GetFieldIndex(realname)):
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161 if src.GetFieldType(realname) == 2:
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162 target.SetField(value, src.GetFieldAsDouble(realname))
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163 else:
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164 target.SetField(value, utils.getUTF8(src.GetField(realname)))
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165
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166 def shape2Database(self, srcLayer, name, path):
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167 destLayer = self.dbconn.GetLayerByName(self.getTablename())
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168
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169 if srcLayer is None:
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170 logger.error("Shapefile is None!")
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171 return -1
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172
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173 if destLayer is None:
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174 logger.error("No destination layer given!")
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175 return -1
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176
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177 count = srcLayer.GetFeatureCount()
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178 logger.debug("Try to add %i features to database." % count)
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179
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180 srcLayer.ResetReading()
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181 self.srcLayer = srcLayer
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182
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183 geomType = -1
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184 success = 0
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185 unsupported = {}
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186 creationFailed = 0
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187 featureDef = destLayer.GetLayerDefn()
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188
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189 for feat in srcLayer:
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190 geom = feat.GetGeometryRef()
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191
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192 if geom is None:
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193 logger.debug("Unkown Geometry reference for feature")
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194 continue
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195
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196 geomType = geom.GetGeometryType()
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197
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198 if self.isGeometryValid(geomType):
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199 newFeat = self.createNewFeature(featureDef,
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200 feat,
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201 name=utils.getUTF8(name),
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202 path=path)
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203
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204 if newFeat is not None:
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205 newFeat.SetField("path", utils.getUTF8Path(path))
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206 newFeat = self.transform(newFeat)
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207 if newFeat:
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208 res = destLayer.CreateFeature(newFeat)
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209 if res is None or res > 0:
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210 logger.error("Unable to insert feature. Error: %r" % res)
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211 else:
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212 success = success + 1
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213 else:
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214 logger.error("Could not transform feature: %s " % feat.GetFID())
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215 creationFailed += 1
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216 else:
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diff changeset
217 creationFailed = creationFailed + 1
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218 else:
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219 unsupported[utils.getWkbString(geomType)] = \
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220 unsupported.get(utils.getWkbString(geomType), 0) + 1
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221
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222 logger.info("Inserted %i features" % success)
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223 logger.info("Failed to create %i features" % creationFailed)
5001
fed74592a2ba Fix syntax error
Andre Heinecke <aheinecke@intevation.de>
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diff changeset
224 for key, value in unsupported.items():
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diff changeset
225 logger.info("Found %i unsupported features of type: %s" % (value, key))
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226
4886
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
227 if self.tracking_import:
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Andre Heinecke <aheinecke@intevation.de>
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228 unhandled = []
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229 for i in range(0, srcLayer.GetLayerDefn().GetFieldCount()):
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diff changeset
230 act_field = srcLayer.GetLayerDefn().GetFieldDefn(i).GetNameRef()
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diff changeset
231 if not act_field in self.handled_fields:
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diff changeset
232 unhandled.append(act_field)
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233
4886
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234 if len(unhandled):
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235 logger.info("Did not import values from fields: %s " % \
4886
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diff changeset
236 " ".join(unhandled))
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237
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238 try:
4970
174fbaa3d344 Add handling of River Names and remove target_src parameter
Andre Heinecke <aheinecke@intevation.de>
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diff changeset
239 if self.dry_run:
3655
8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
diff changeset
240 return geomType
2853
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
241 destLayer.CommitTransaction()
5160
0dae9e77c5da Importer fix issues reported by pylint
Andre Heinecke <aheinecke@intevation.de>
parents: 5077
diff changeset
242 except:
5006
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diff changeset
243 logger.error("Exception while committing transaction.")
2853
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parents:
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244
bd9e76e0b55d Improved the python shapefile importer.
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diff changeset
245 return geomType
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