Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4970:174fbaa3d344 dami

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Add handling of River Names and remove target_src parameter This is the first step to make the shpimporter into a more generic geo importer that communicates directly (not only over ogr) with the database. Untested with Oracle
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 13 Feb 2013 12:02:30 +0100
parents 23a090b41543
children a92241d40228
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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parents: 4871
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2 from osgeo import ogr
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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 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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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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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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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 geometry.Transform(transformer)
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108
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109 return feat
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110
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111 def handled(self, field):
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112 """
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113 Register a field or a map of as handled during the import.
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114
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115 There is a warning printed after the import for each unhandled field!
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116 """
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117 if not field in self.handled_fields:
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118 self.handled_fields.append(field)
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119
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120 def copyFields(self, src, target, mapping):
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121 """
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122 Checks the mapping dictonary for key value pairs to
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123 copy from the source to the destination feature.
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124 The keys can be reguar expressions that are matched
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125 agains the source fieldnames
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126
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127 The Key is the attribute of the source feature to be copied
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diff changeset
128 into the target attribute named by the dict's value.
b457532dae63 Importer: Move copy fields into importer class and track imported/unimported fields
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129 """
4885
89a8764cabcc Importer: Only show imported fields if copy_fields is used
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130 self.tracking_import = True
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diff changeset
131 for key, value in mapping.items():
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132 realname = self.searchField(key)
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133 if realname == None:
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134 continue
4935
c0a58558b817 Importer: - Handle regular expressions for attribute names
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135 if not realname in self.handled_fields:
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136 self.handled_fields.append(realname)
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diff changeset
137 # 0 OFTInteger, Simple 32bit integer
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138 # 1 OFTIntegerList, List of 32bit integers
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parents: 4878
diff changeset
139 # 2 OFTReal, Double Precision floating point
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140 # 3 OFTRealList, List of doubles
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diff changeset
141 # 4 OFTString, String of ASCII chars
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142 # 5 OFTStringList, Array of strings
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diff changeset
143 # 6 OFTWideString, deprecated
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144 # 7 OFTWideStringList, deprecated
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diff changeset
145 # 8 OFTBinary, Raw Binary data
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diff changeset
146 # 9 OFTDate, Date
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147 # 10 OFTTime, Time
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diff changeset
148 # 11 OFTDateTime, Date and Time
4935
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diff changeset
149 if src.IsFieldSet(src.GetFieldIndex(realname)):
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150 if src.GetFieldType(realname) == 2:
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diff changeset
151 target.SetField(value, src.GetFieldAsDouble(realname))
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152 else:
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153 target.SetField(value, utils.getUTF8(src.GetField(realname)))
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154
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155 def shape2Database(self, srcLayer, name, path):
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a563e9f58f93 Improve error handling and unify dbconn for all importers
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156 destLayer = self.dbconn.GetLayerByName(self.getTablename())
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157
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158 if srcLayer is None:
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159 shpimporter.ERROR("Shapefile is None!")
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160 return -1
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161
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162 if destLayer is None:
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163 shpimporter.ERROR("No destination layer given!")
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164 return -1
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165
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166 count = srcLayer.GetFeatureCount()
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167 shpimporter.DEBUG("Try to add %i features to database." % count)
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168
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169 srcLayer.ResetReading()
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170 self.srcLayer = srcLayer
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171
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172 geomType = -1
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173 success = 0
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174 unsupported = 0
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175 creationFailed = 0
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176 featureDef = destLayer.GetLayerDefn()
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177
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178 for feat in srcLayer:
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179 geom = feat.GetGeometryRef()
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180
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diff changeset
181 if geom is None:
4878
82d00b0c7302 (importer) Avoid uneccessary error and improve debug output
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182 shpimporter.DEBUG("Unkown Geometry reference for feature")
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diff changeset
183 continue
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184
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185 geomType = geom.GetGeometryType()
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186
bd9e76e0b55d Improved the python shapefile importer.
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187 if self.isGeometryValid(geomType):
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188 newFeat = self.createNewFeature(featureDef,
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189 feat,
4951
23a090b41543 Importer: Check lowercase pathname and handle utf-8 conversion
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diff changeset
190 name=utils.getUTF8(name),
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191 path=path)
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192
bd9e76e0b55d Improved the python shapefile importer.
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193 if newFeat is not None:
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diff changeset
194 newFeat.SetField("path", utils.getUTF8Path(path))
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195 newFeat = self.transform(newFeat)
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196 res = destLayer.CreateFeature(newFeat)
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197 if res is None or res > 0:
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198 shpimporter.ERROR("Unable to insert feature. Error: %r" % res)
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199 else:
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200 success = success + 1
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201 else:
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diff changeset
202 creationFailed = creationFailed + 1
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203 else:
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204 unsupported = unsupported + 1
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205
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diff changeset
206 shpimporter.INFO("Inserted %i features" % success)
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diff changeset
207 shpimporter.INFO("Failed to create %i features" % creationFailed)
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diff changeset
208 shpimporter.INFO("Found %i unsupported features" % unsupported)
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209
4886
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diff changeset
210 if self.tracking_import:
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diff changeset
211 unhandled = []
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diff changeset
212 for i in range(0, srcLayer.GetLayerDefn().GetFieldCount()):
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diff changeset
213 act_field = srcLayer.GetLayerDefn().GetFieldDefn(i).GetNameRef()
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diff changeset
214 if not act_field in self.handled_fields:
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diff changeset
215 unhandled.append(act_field)
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diff changeset
216
4886
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diff changeset
217 if len(unhandled):
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diff changeset
218 shpimporter.INFO("Did not import values from fields: %s " % \
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
219 " ".join(unhandled))
4884
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diff changeset
220
2853
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parents:
diff changeset
221 try:
4970
174fbaa3d344 Add handling of River Names and remove target_src parameter
Andre Heinecke <aheinecke@intevation.de>
parents: 4951
diff changeset
222 if self.dry_run:
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parents: 3654
diff changeset
223 return geomType
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parents:
diff changeset
224 destLayer.CommitTransaction()
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
225 except e:
3655
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
diff changeset
226 shpimporter.ERROR("Exception while committing transaction.")
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parents:
diff changeset
227
bd9e76e0b55d Improved the python shapefile importer.
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diff changeset
228 return geomType
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