Read/write map from/to AsyncStreams

[knutf]

Is it possible to Read/write map from/to an AsyncStreams in the same way as you can with File.ReadMap/WriteMap?

 

[derez]

Use ReadObject and WriteObject, then it is one piece of data.

 

[Erel]

You can use OutputSteram.InitializeToBytesArray to create a memory stream. You should then write the text map with a TextWriter. OutputStream.ToBytesArray will return the array of bytes.

 

[knutf]

Thank you.

I'm not sure if I fully understand what you mean, but, based on your answers I have made the following code:

Dim settings As Map

'**************************
some code to fill values in settings
'**************************

Dim bytesbuffer(100000) As Byte
Dim raf As RandomAccessFile
raf.Initialize3(bytesbuffer,True)
raf.WriteObject(settings,True,0)            
Dim bc As ByteConverter
Dim HexString As String = bc.HexFromBytes(bytesbuffer)      
stream.Write(HexString.SubString2(0,raf.CurrentPosition*2) & Chr(13) & Chr(10))

I convert the bytesbuffer to HexString because the stream is an AsyncStreamsText
The code seams to work as intended. My only concern is that the bytesbuffer must be
of fixed size. I do not want to oversize the buffer and the size of the written object could vary a lot. Is there a way around the buffer size concern?

 

[Erel]

My previous answer was not correct as there is no WriteMap method in TextWriter.

I recommend you to use a temporary file. Write the map and then read it into a bytes array:
http://www.b4x.com/forum/basic4andr...ile-dirassets-solution-wanted.html#post154939