Exception thrown for dataset reader-related failures.
Implementations of the {@link DatasetReader} interface throw this exceptionif any of their operations fail. This is a runtime (unchecked) exception.
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return null; case NULL: return null; default: // FIXED, BYTES, MAP, ARRAY, RECORD are not supported throw new DatasetReaderException( "Unsupported field type:" + schema.getType()); } } catch (NumberFormatException ex) { return null; }