internal ColumnReader(ParquetHandle handle, RowGroupReader rowGroupReader, ColumnChunkMetaData columnChunkMetaData, int columnIndex)
{
Handle = handle;
RowGroupReader = rowGroupReader;
ColumnChunkMetaData = columnChunkMetaData;
ColumnIndex = columnIndex;
}
internal static ColumnReader Create(IntPtr handle, RowGroupReader rowGroupReader, ColumnChunkMetaData columnChunkMetaData, int columnIndex)
{
var parquetHandle = new ParquetHandle(handle, ColumnReader_Free);
try
{
var type = ExceptionInfo.Return <PhysicalType>(handle, ColumnReader_Type);
switch (type)
{
case PhysicalType.Boolean:
return(new ColumnReader <bool>(parquetHandle, rowGroupReader, columnChunkMetaData, columnIndex));
case PhysicalType.Int32:
return(new ColumnReader <int>(parquetHandle, rowGroupReader, columnChunkMetaData, columnIndex));
case PhysicalType.Int64:
return(new ColumnReader <long>(parquetHandle, rowGroupReader, columnChunkMetaData, columnIndex));
case PhysicalType.Int96:
return(new ColumnReader <Int96>(parquetHandle, rowGroupReader, columnChunkMetaData, columnIndex));
case PhysicalType.Float:
return(new ColumnReader <float>(parquetHandle, rowGroupReader, columnChunkMetaData, columnIndex));
case PhysicalType.Double:
return(new ColumnReader <double>(parquetHandle, rowGroupReader, columnChunkMetaData, columnIndex));
case PhysicalType.ByteArray:
return(new ColumnReader <ByteArray>(parquetHandle, rowGroupReader, columnChunkMetaData, columnIndex));
case PhysicalType.FixedLenByteArray:
return(new ColumnReader <FixedLenByteArray>(parquetHandle, rowGroupReader, columnChunkMetaData, columnIndex));
default:
throw new NotSupportedException($"Physical type {type} is not supported");
}
}
catch
{
parquetHandle.Dispose();
throw;
}
}
