exoplatform/forum — pull request #101 by trangvh (2014-04-21 03:32:55+00:00)
Title: FORUM-541: UnsupportedOperationException when deleting or adding attachments

Problem analysis:
* During the update of a topic/post, the attachment cache data are inserted to topic/post object.
These data are fixed-size Lists and therefore don't allow "add" or "remove" operation.

Fix description:
* Wrap attachment cache data by ArrayList when updating Topic/Post object.