/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="input"></param>
/// <param name="rowGroupIndex"></param>
/// <returns></returns>
public static T[] Deserialize <T>(Stream input, int rowGroupIndex = -1) where T : new()
{
var result = new List <T>();
using (var reader = new ParquetReader(input))
{
Schema fileSchema = new SchemaReflector(typeof(T)).Reflect();
DataField[] dataFields = fileSchema.GetDataFields();
if (rowGroupIndex == -1) //Means read all row groups.
{
for (int i = 0; i < reader.RowGroupCount; i++)
{
T[] currentRowGroupRecords = ReadAndDeserializeByRowGroup <T>(i, reader, dataFields);
result.AddRange(currentRowGroupRecords);
}
}
else //read specific rowgroup.
{
T[] currentRowGroupRecords = ReadAndDeserializeByRowGroup <T>(rowGroupIndex, reader, dataFields);
result.AddRange(currentRowGroupRecords);
}
}
return(result.ToArray());
}
