I will forward a portion of this email to the OpenJDK folks and see what they think about compatibility options.
On Wed, Nov 13, 2013 at 3:49 PM, Thomas Neidhart <thomas.neidh...@gmail.com>wrote: > Hi, > > during the vote for collections 4.0 we have discovered a problem wrt the > MultiMap interface in general and specifically the MultiKeyMap. > > Java 8 introduces a new default method in the Map interface: > > boolean remove(Object key, Object value) > > This clashes with the method in MultiMap: > > V remove(K key, V value) > > and the remove methods for multiple keys in MultiKeyMap: > > V remove(K key1, K key2) > > > Just changing the return type does not solve the problem, as one can not > re-define a method in an interface without using the @Override > annotation, but this would only work when compiling with JDK 8 and fail > for other JDKs. > > For the MultiKeyMap it would be semantically wrong too, thus I propose a > name change. > > For MultiMap: > > boolean removeMapping(K key, V value) > > For MultiKeyMap (for all remove(K ...) methods): > > V removeMultiKey(K key1, K key2) > V removeMultiKey(K key1, K key2, K key3) > ... > > > In the case of the MultiMap, I think returning a boolean makes more > sense, similar as Java 8 does it. > > For the MultiKeyMap, returning the previously mapped value is preferable > imho. > > Any objections? > > Thomas > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > -- Cheers, Paul
