Mercurial > dive4elements > river
annotate backend/contrib/shpimporter/importer.py @ 8142:d4e4dde1d5cb
With the exception of real calculation results, descriptions of sediment loads can all follow the same pattern.
author | Tom Gottfried <tom@intevation.de> |
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date | Tue, 26 Aug 2014 17:16:21 +0200 |
parents | 5aa05a7a34b7 |
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rev | line source |
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1 try: |
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2 from osgeo import ogr, osr |
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3 except ImportError: |
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4 import ogr, osr |
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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 searchValue(self, feat, regex): |
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49 """ |
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50 Searches for a value that matches regex in all attribute |
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51 fields of a feature. |
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52 |
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53 @returns the name of the field where a match was found or None |
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54 """ |
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55 for val in feat.items(): |
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56 if not isinstance(feat.items()[val], basestring): |
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57 continue |
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58 match = re.match(regex, feat.items()[val], re.IGNORECASE) |
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59 if match: |
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60 return val |
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61 |
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62 def searchField(self, regex): |
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63 """ |
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64 Searches for a field in the current src layer that matches |
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65 the expression regex. |
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66 Throws an exception if more than one field matches |
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67 @param feat: The feature to search for attributes |
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68 @param regex: The regex to look for |
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69 |
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70 @returns: The field name as a string |
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71 """ |
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72 |
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73 if not hasattr(self.srcLayer, "fieldnames"): |
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74 self.srcLayer.fieldnames = [] |
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75 for i in range(0, self.srcLayer.GetLayerDefn().GetFieldCount()): |
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76 self.srcLayer.fieldnames.append( |
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77 self.srcLayer.GetLayerDefn().GetFieldDefn(i).GetNameRef()) |
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78 |
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79 result = None |
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80 for name in self.srcLayer.fieldnames: |
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81 match = re.match(regex, name, re.IGNORECASE) |
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82 if match: |
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83 if result: |
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84 raise Exception("More than one field matches: %s" % regex) |
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85 else: |
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86 result = match.group(0) |
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87 return result |
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88 |
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89 def IsDoubleFieldSet(self, feat, name): |
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90 if not self.IsFieldSet(feat, name): |
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91 return False |
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92 try: |
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93 isset = feat.GetFieldAsDouble(name) |
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94 return isset is not None |
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95 except: |
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96 return False |
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97 |
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98 def isShapeRelevant(self, name, path): |
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99 return True |
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100 |
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101 def walkOverShapes(self, shape): |
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102 (name, path) = shape |
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103 |
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104 shp = ogr.Open(shape[1]) |
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105 if shp is None: |
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106 logger.error("Shapefile '%s' could not be opened!" % path) |
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107 return |
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108 |
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109 if not self.isShapeRelevant(name, path): |
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110 logger.info("Skip shapefile: '%s' of Type: %s" % (path, |
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111 utils.getWkbString(shp.GetLayerByName(name).GetGeomType()))) |
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112 return |
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113 |
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114 |
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115 logger.info("Processing shapefile '%s'" % path) |
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116 srcLayer = shp.GetLayerByName(name) |
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117 |
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118 if srcLayer is None: |
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119 logger.error("Layer '%s' was not found!" % name) |
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120 return |
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121 |
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122 return self.shape2Database(srcLayer, name, path) |
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123 |
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124 def transform(self, feat): |
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125 geometry = feat.GetGeometryRef() |
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126 src_srs = geometry.GetSpatialReference() |
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127 |
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128 if src_srs is None: |
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129 logger.error("No source SRS given! No transformation possible!") |
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130 return feat |
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131 |
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132 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs) |
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133 if geometry.Transform(transformer): |
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134 return None |
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135 |
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136 return feat |
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137 |
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138 def handled(self, field): |
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139 """ |
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140 Register a field or a map of as handled during the import. |
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141 |
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142 There is a warning printed after the import for each unhandled field! |
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143 """ |
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144 if not field in self.handled_fields: |
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145 self.handled_fields.append(field) |
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146 |
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147 def copyFields(self, src, target, mapping): |
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148 """ |
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149 Checks the mapping dictonary for key value pairs to |
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150 copy from the source to the destination feature. |
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151 The keys can be reguar expressions that are matched |
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152 agains the source fieldnames |
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153 |
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154 The Key is the attribute of the source feature to be copied |
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155 into the target attribute named by the dict's value. |
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156 """ |
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157 self.tracking_import = True |
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158 for key, value in mapping.items(): |
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159 realname = self.searchField(key) |
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160 if realname == None: |
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161 continue |
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162 if not realname in self.handled_fields: |
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163 self.handled_fields.append(realname) |
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164 # 0 OFTInteger, Simple 32bit integer |
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165 # 1 OFTIntegerList, List of 32bit integers |
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166 # 2 OFTReal, Double Precision floating point |
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167 # 3 OFTRealList, List of doubles |
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168 # 4 OFTString, String of ASCII chars |
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169 # 5 OFTStringList, Array of strings |
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170 # 6 OFTWideString, deprecated |
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171 # 7 OFTWideStringList, deprecated |
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172 # 8 OFTBinary, Raw Binary data |
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173 # 9 OFTDate, Date |
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174 # 10 OFTTime, Time |
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175 # 11 OFTDateTime, Date and Time |
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176 if src.IsFieldSet(src.GetFieldIndex(realname)): |
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177 if src.GetFieldType(realname) == 2: |
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178 target.SetField(value, src.GetFieldAsDouble(realname)) |
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179 else: |
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180 target.SetField(value, utils.getUTF8(src.GetField(realname))) |
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181 |
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182 def shape2Database(self, srcLayer, name, path): |
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183 destLayer = self.dbconn.GetLayerByName(self.getTablename()) |
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184 |
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185 if srcLayer is None: |
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186 logger.error("Shapefile is None!") |
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187 return -1 |
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188 |
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189 if destLayer is None: |
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190 logger.error("No destination layer given!") |
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191 return -1 |
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192 |
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193 count = srcLayer.GetFeatureCount() |
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194 logger.debug("Try to add %i features to database." % count) |
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195 |
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196 srcLayer.ResetReading() |
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197 self.srcLayer = srcLayer |
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198 |
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199 geomType = -1 |
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200 success = 0 |
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201 unsupported = {} |
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202 creationFailed = 0 |
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203 featureDef = destLayer.GetLayerDefn() |
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204 |
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205 for feat in srcLayer: |
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206 geom = feat.GetGeometryRef() |
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207 |
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208 if geom is None: |
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209 logger.debug("Unkown Geometry reference for feature") |
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210 continue |
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211 |
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212 geomType = geom.GetGeometryType() |
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213 |
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214 if self.isGeometryValid(geomType): |
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215 newFeat = self.createNewFeature(featureDef, |
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216 feat, |
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217 name=utils.getUTF8(name), |
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218 path=path) |
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219 |
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220 if newFeat is not None: |
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221 newFeat.SetField("path", utils.getUTF8Path(path)) |
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222 newFeat = self.transform(newFeat) |
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223 if newFeat: |
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224 res = destLayer.CreateFeature(newFeat) |
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225 if res is None or res > 0: |
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226 logger.error("Unable to insert feature. Error: %r" % res) |
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227 else: |
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228 success = success + 1 |
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229 else: |
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230 logger.error("Could not transform feature: %s " % feat.GetFID()) |
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231 creationFailed += 1 |
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232 else: |
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233 creationFailed = creationFailed + 1 |
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234 else: |
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235 unsupported[utils.getWkbString(geomType)] = \ |
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236 unsupported.get(utils.getWkbString(geomType), 0) + 1 |
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237 |
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238 logger.info("Inserted %i features" % success) |
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239 logger.info("Failed to create %i features" % creationFailed) |
5001 | 240 for key, value in unsupported.items(): |
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241 logger.info("Found %i unsupported features of type: %s" % (value, key)) |
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242 |
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243 if self.tracking_import: |
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244 unhandled = [] |
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245 for i in range(0, srcLayer.GetLayerDefn().GetFieldCount()): |
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246 act_field = srcLayer.GetLayerDefn().GetFieldDefn(i).GetNameRef() |
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247 if not act_field in self.handled_fields: |
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248 unhandled.append(act_field) |
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249 |
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250 if len(unhandled): |
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251 logger.info("Did not import values from fields: %s " % \ |
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252 " ".join(unhandled)) |
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253 |
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254 try: |
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255 if self.dry_run: |
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256 return geomType |
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257 destLayer.CommitTransaction() |
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258 except: |
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259 logger.error("Exception while committing transaction.") |
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260 |
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261 return geomType |