How UMA and WAA keep the time stamp of monitored file/folder when transferring?

How UMA and WAA keep the time stamp of monitored file/folder when transferring?

Answer: UMA pick original time stamp when access to file, then transfer its value to WAA.
   WAA side generates file/folder on disc then, apply original time stamp on it.

NOTE: On WAA side, if HASH check is enabled (default), WAA will not monitor MTIME of the file.
So, if in case of any customer software change only MTIME of the file after WA transfer completed, it looks like time stamp has been changed by WA, but it is not.
This can be confirmed in UMA debug log example below:

2016/06/20 10:07:43.064164 (ZoneMgr:000480) UmaAddFile:
msg=/opt/aladin-cmp/fp/attention.jsp,33204,501,502,20160620100742,20160620100715,/opt/wa4/wa.tmp/uma19Q4Va,c7104e73a7527728b45e23bfea35a0011ea61e85

20160620100742 --> this is the file Atime (last accessed time).

20160620100715 --> this is the file Mtime (last modified time).

Values has picked from original file/folder. And mtime apply to file on WAA side when transfer completed.