exoplatform/forum — pull request #103 by trangvh (2014-04-22 10:07:55+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 the attachments by resizable ArrayList when getting post information.