Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4976:a6ee62a070b0 dami

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I'm learning how to use cursors \o/
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 13 Feb 2013 17:49:30 +0100
parents a92241d40228
children 998b29c8d2fd
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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8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
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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 import re
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9
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10 class Importer:
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11
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174fbaa3d344 Add handling of River Names and remove target_src parameter
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12 def __init__(self, river_id, dbconn, dry_run):
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13 self.river_id = river_id
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14 self.dbconn = dbconn
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15 self.dry_run = dry_run
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16 self.dest_srs = osr.SpatialReference()
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17 self.dest_srs.ImportFromEPSG(31467)
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18 self.handled_fields = []
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89a8764cabcc Importer: Only show imported fields if copy_fields is used
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19 self.tracking_import = False
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20 self.srcLayer = None
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21
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22 def getKind(self, path):
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23 raise NotImplementedError("Importer.getKind is abstract!")
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24
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25 def getPath(self, base):
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26 raise NotImplementedError("Importer.getPath is abstract!")
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27
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28 def getTablename(self):
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29 raise NotImplementedError("Importer.getTablename is abstract!")
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30
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31 def getName(self):
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32 raise NotImplementedError("Importer.getTablename is abstract!")
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33
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34 def IsFieldSet(self, feat, name):
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35 if not name:
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36 return False
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37 if feat.GetFieldIndex(name) == -1:
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38 return False # Avoids an Error in IsFieldSet
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39 return feat.IsFieldSet(feat.GetFieldIndex(name))
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40
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41 def searchField(self, regex):
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42 """
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43 Searches for a field in the current src layer that matches
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44 the expression regex.
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45 Throws an exception if more then one field matches
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parents: 4886
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46 @param feat: The feature to search for attributes
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47 @param regex: The regex to look for
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48
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49 @returns: The field name as a string
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50 """
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51
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52 if not hasattr(self.srcLayer, "fieldnames"):
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53 self.srcLayer.fieldnames = []
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54 for i in range(0, self.srcLayer.GetLayerDefn().GetFieldCount()):
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55 self.srcLayer.fieldnames.append(
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56 self.srcLayer.GetLayerDefn().GetFieldDefn(i).GetNameRef())
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57
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58 result = None
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59 for name in self.srcLayer.fieldnames:
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60 match = re.match(regex, name, re.IGNORECASE)
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61 if match:
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62 if result:
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63 raise Exception("More then one field matches: %s" % regex)
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64 else:
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65 result = match.group(0)
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66 return result
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67
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68 def IsDoubleFieldSet(self, feat, name):
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69 try:
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70 isset = feat.GetFieldAsDouble(name)
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71 return isset is not None
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72 except:
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73 return False
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74
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75 def isShapeRelevant(self, name, path):
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76 return True
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77
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78 def walkOverShapes(self, shape):
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79 (name, path) = shape
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80 if not self.isShapeRelevant(name, path):
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81 shpimporter.INFO("Skip shapefile '%s'" % path)
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82 return
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83
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84 shp = ogr.Open(shape[1])
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85 if shp is None:
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86 shpimporter.ERROR("Shapefile '%s' could not be opened!" % path)
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87 return
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88
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89 shpimporter.INFO("Processing shapefile '%s'" % path)
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90 srcLayer = shp.GetLayerByName(name)
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91
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92 if srcLayer is None:
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93 shpimporter.ERROR("Layer '%s' was not found!" % name)
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94 return
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95
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96 return self.shape2Database(srcLayer, name, path)
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97
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98 def transform(self, feat):
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99 geometry = feat.GetGeometryRef()
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100 src_srs = geometry.GetSpatialReference()
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101
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102 if src_srs is None:
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103 shpimporter.ERROR("No source SRS given! No transformation possible!")
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104 return feat
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105
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106 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
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107 if geometry.Transform(transformer):
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108 return None
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109
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110 return feat
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111
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112 def handled(self, field):
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113 """
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114 Register a field or a map of as handled during the import.
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115
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116 There is a warning printed after the import for each unhandled field!
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117 """
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118 if not field in self.handled_fields:
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119 self.handled_fields.append(field)
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120
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121 def copyFields(self, src, target, mapping):
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122 """
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123 Checks the mapping dictonary for key value pairs to
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124 copy from the source to the destination feature.
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125 The keys can be reguar expressions that are matched
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126 agains the source fieldnames
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127
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128 The Key is the attribute of the source feature to be copied
b457532dae63 Importer: Move copy fields into importer class and track imported/unimported fields
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diff changeset
129 into the target attribute named by the dict's value.
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130 """
4885
89a8764cabcc Importer: Only show imported fields if copy_fields is used
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diff changeset
131 self.tracking_import = True
4884
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diff changeset
132 for key, value in mapping.items():
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133 realname = self.searchField(key)
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134 if realname == None:
4884
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diff changeset
135 continue
4935
c0a58558b817 Importer: - Handle regular expressions for attribute names
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136 if not realname in self.handled_fields:
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137 self.handled_fields.append(realname)
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diff changeset
138 # 0 OFTInteger, Simple 32bit integer
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139 # 1 OFTIntegerList, List of 32bit integers
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diff changeset
140 # 2 OFTReal, Double Precision floating point
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diff changeset
141 # 3 OFTRealList, List of doubles
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142 # 4 OFTString, String of ASCII chars
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diff changeset
143 # 5 OFTStringList, Array of strings
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diff changeset
144 # 6 OFTWideString, deprecated
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145 # 7 OFTWideStringList, deprecated
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diff changeset
146 # 8 OFTBinary, Raw Binary data
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diff changeset
147 # 9 OFTDate, Date
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148 # 10 OFTTime, Time
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diff changeset
149 # 11 OFTDateTime, Date and Time
4935
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diff changeset
150 if src.IsFieldSet(src.GetFieldIndex(realname)):
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151 if src.GetFieldType(realname) == 2:
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diff changeset
152 target.SetField(value, src.GetFieldAsDouble(realname))
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153 else:
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diff changeset
154 target.SetField(value, utils.getUTF8(src.GetField(realname)))
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155
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156 def shape2Database(self, srcLayer, name, path):
4872
a563e9f58f93 Improve error handling and unify dbconn for all importers
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diff changeset
157 destLayer = self.dbconn.GetLayerByName(self.getTablename())
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158
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159 if srcLayer is None:
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160 shpimporter.ERROR("Shapefile is None!")
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161 return -1
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162
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163 if destLayer is None:
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164 shpimporter.ERROR("No destination layer given!")
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165 return -1
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166
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167 count = srcLayer.GetFeatureCount()
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168 shpimporter.DEBUG("Try to add %i features to database." % count)
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169
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170 srcLayer.ResetReading()
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diff changeset
171 self.srcLayer = srcLayer
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172
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173 geomType = -1
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174 success = 0
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175 unsupported = 0
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176 creationFailed = 0
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diff changeset
177 featureDef = destLayer.GetLayerDefn()
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178
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179 for feat in srcLayer:
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180 geom = feat.GetGeometryRef()
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181
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diff changeset
182 if geom is None:
4878
82d00b0c7302 (importer) Avoid uneccessary error and improve debug output
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183 shpimporter.DEBUG("Unkown Geometry reference for feature")
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184 continue
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185
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186 geomType = geom.GetGeometryType()
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187
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188 if self.isGeometryValid(geomType):
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189 newFeat = self.createNewFeature(featureDef,
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190 feat,
4951
23a090b41543 Importer: Check lowercase pathname and handle utf-8 conversion
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diff changeset
191 name=utils.getUTF8(name),
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192 path=path)
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193
bd9e76e0b55d Improved the python shapefile importer.
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194 if newFeat is not None:
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diff changeset
195 newFeat.SetField("path", utils.getUTF8Path(path))
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196 newFeat = self.transform(newFeat)
4974
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197 if newFeat:
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198 res = destLayer.CreateFeature(newFeat)
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199 if res is None or res > 0:
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200 shpimporter.ERROR("Unable to insert feature. Error: %r" % res)
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diff changeset
201 else:
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diff changeset
202 success = success + 1
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203 else:
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diff changeset
204 shpimporter.ERROR("Could not transform feature: %s " % feat.GetFID())
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diff changeset
205 creationFailed += 1
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diff changeset
206 else:
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diff changeset
207 creationFailed = creationFailed + 1
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208 else:
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diff changeset
209 unsupported = unsupported + 1
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210
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diff changeset
211 shpimporter.INFO("Inserted %i features" % success)
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diff changeset
212 shpimporter.INFO("Failed to create %i features" % creationFailed)
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diff changeset
213 shpimporter.INFO("Found %i unsupported features" % unsupported)
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214
4886
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diff changeset
215 if self.tracking_import:
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diff changeset
216 unhandled = []
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diff changeset
217 for i in range(0, srcLayer.GetLayerDefn().GetFieldCount()):
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diff changeset
218 act_field = srcLayer.GetLayerDefn().GetFieldDefn(i).GetNameRef()
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diff changeset
219 if not act_field in self.handled_fields:
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diff changeset
220 unhandled.append(act_field)
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diff changeset
221
4886
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
222 if len(unhandled):
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
223 shpimporter.INFO("Did not import values from fields: %s " % \
8e99d2d9364d Importer: When not tracking dont print info about unimported fields
Andre Heinecke <aheinecke@intevation.de>
parents: 4885
diff changeset
224 " ".join(unhandled))
4884
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diff changeset
225
2853
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parents:
diff changeset
226 try:
4970
174fbaa3d344 Add handling of River Names and remove target_src parameter
Andre Heinecke <aheinecke@intevation.de>
parents: 4951
diff changeset
227 if self.dry_run:
3655
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parents: 3654
diff changeset
228 return geomType
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
229 destLayer.CommitTransaction()
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parents:
diff changeset
230 except e:
3655
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
diff changeset
231 shpimporter.ERROR("Exception while committing transaction.")
2853
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232
bd9e76e0b55d Improved the python shapefile importer.
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diff changeset
233 return geomType
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