private static Stream GetSeekableStream(IUnstructuredReader input, SeekableInputStreamHackMode inputStreamHackMode)
{
switch (inputStreamHackMode)
{
case SeekableInputStreamHackMode.Disabled:
return(input.BaseStream);
case SeekableInputStreamHackMode.CopyToMemoryStream:
var ms = new MemoryStream((int)input.Length);
input.BaseStream.CopyTo(ms);
ms.Seek(0, SeekOrigin.Begin);
return(ms);
case SeekableInputStreamHackMode.ReflectIntoBaseStream:
throw new NotImplementedException();
case SeekableInputStreamHackMode.MemoryMappedFile:
var mmf = MemoryMappedFile.CreateNew(Guid.NewGuid().ToString(), input.Length);
using (var mmvs = mmf.CreateViewStream(0, input.Length, MemoryMappedFileAccess.Write))
{
input.BaseStream.CopyTo(mmvs);
}
return(mmf.CreateViewStream(0, input.Length, MemoryMappedFileAccess.Read));
default:
throw new NotImplementedException();
}
}
public OrcExtractor(SeekableInputStreamHackMode streamHackMode = SeekableInputStreamHackMode.CopyToMemoryStream)
{
SeekableStreamHackMode = streamHackMode;
}
