tree 000a4a6eb161d90b7014a0b408c729f32d581e76
parent 11a0ad4f64a3c325ae23684f3d610b4a83f8b828
author Zhenkai Zhu <zhenkai@cs.ucla.edu> 1331019750 -0800
committer Zhenkai Zhu <zhenkai@cs.ucla.edu> 1331019750 -0800

create interface for data buffer;
create concrete class for app data buffer;
use decorator pattern for sync data buffer, which supports << and >>
from FullState and DiffState