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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=8705 SessionListener should extend EventListener ------- Additional Comments From [EMAIL PROTECTED] 2002-05-01 20:06 ------- We ran into this case in one of the proposed changes to Servlet 2.3, which added FilterConfig. Conceptually, it made sense to abstract out the common features of FilterConfig and the existing ServletConfig interfaces into a new Config interface that both would inherit from. Alas, when you do that, code compiled against the "old" version cannot run against implementations compiled against the "new" version -- and vice versa. So, we had to back away from doing this. The reason this happens is that the compiler remembers the whole inheritance tree at compile time, and the JVM uses that at runtime as part of the matching criteria to see if the class you are requesting is compatible with the way it is being used. Unfortunately, introducing an additional parentage to an interface (even though it doesn't affect the available methods) can trigger this incompatibility check. Admittedly, there is probably not a lot of code in the world that would be affected by this in the case of SessionListener -- but it is still a real issue. -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
