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| 310 | |
| 311 | //------------------------------------------------------------------------------ |
| 312 | void vtkGeoJSONFeature::ExtractGeoJSONFeature(const Json::Value& root, vtkPolyData* outputData) |
| 313 | { |
| 314 | this->featureRoot = root; |
| 315 | |
| 316 | // Check that type is Feature |
| 317 | Json::Value const& typeNode = root["type"]; |
| 318 | if (typeNode.isNull() || "Feature" != typeNode.asString()) |
| 319 | { |
| 320 | vtkErrorMacro(<< "Unknown type. \"Feature\" expected"); |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | // Check for geometry node |
| 325 | Json::Value const& geometryNode = root["geometry"]; |
| 326 | if (geometryNode.isNull()) |
| 327 | { |
| 328 | vtkErrorMacro(<< "Missing geometry node"); |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | // Check for properties node |
| 333 | Json::Value const& propertiesNode = root["properties"]; |
| 334 | if (propertiesNode.isNull()) |
| 335 | { |
| 336 | vtkErrorMacro(<< "Missing properties node"); |
| 337 | return; |
| 338 | } |
| 339 | |
| 340 | // Check for feature id |
| 341 | std::string featureString; |
| 342 | Json::Value const& idNode = root["id"]; |
| 343 | // No Json::Value::toString() method, so homebrew one here |
| 344 | std::stringstream oss; |
| 345 | switch (idNode.type()) |
| 346 | { |
| 347 | case Json::nullValue: |
| 348 | break; |
| 349 | |
| 350 | case Json::intValue: |
| 351 | case Json::uintValue: |
| 352 | oss << idNode.asInt(); |
| 353 | featureString = oss.str(); |
| 354 | break; |
| 355 | |
| 356 | case Json::realValue: |
| 357 | oss << idNode.asDouble(); |
| 358 | featureString = oss.str(); |
| 359 | break; |
| 360 | |
| 361 | case Json::stringValue: |
| 362 | featureString = idNode.asString(); |
| 363 | break; |
| 364 | |
| 365 | default: |
| 366 | vtkWarningMacro(<< "Unsupported \"id\" type: " << idNode.type()); |
| 367 | break; |
| 368 | } |
| 369 |