/// <summary>
/// Creates an instance from input stream
/// </summary>
/// <param name="input">Input stream, must be readable and seekable</param>
/// <param name="formatOptions">Optional reader options</param>
/// <param name="readerOptions">The reader options.</param>
/// <exception cref="ArgumentNullException">input</exception>
/// <exception cref="ArgumentException">stream must be readable and seekable - input</exception>
/// <exception cref="IOException">not a Parquet file (size too small)</exception>
public ParquetReader(Stream input, ParquetOptions formatOptions = null, ReaderOptions readerOptions = null) : base(input)
{
_input = input ?? throw new ArgumentNullException(nameof(input));
if (!input.CanRead || !input.CanSeek)
{
throw new ArgumentException("stream must be readable and seekable", nameof(input));
}
if (_input.Length <= 8)
{
throw new IOException("not a Parquet file (size too small)");
}
ValidateFile();
_formatOptions = formatOptions ?? new ParquetOptions();
_readerOptions = readerOptions ?? new ReaderOptions();
_fieldPredicates = PredicateFactory.CreateFieldPredicates(_readerOptions);
}
