[jbosscache-dev] New collections

[Manik Surtani]

If other projects are interested in these, I have no objections to  
moving these there.

On 23 Jul 2008, at 17:20, Brian Stansberry wrote:

> Should these migrate to jboss-common so they can come from there in  
> future releases? Or if not come from there for JBC use, be available  
> to projects outside JBC?
>
> Manik Surtani wrote:
>> Guys,
>> I have created 3 new collection impls in trunk - ImmutableListCopy,  
>> ImmutableSetCopy and ImmutableMapCopy.  I have also ported the  
>> first 2 to branch 2.2.x (the reason why I didnt port the third is  
>> because the MapCopy which it replaces can get serialized and I  
>> don't want to break binary compat).
>> See the Javadoc of these classes for more details, but in a  
>> nutshell these are very efficient alternatives to the "immutable  
>> and defensively copied" idiom.  I.e., if you ever find yourself  
>> doing:
>>    return Collections.unmodifiableList(new ArrayList(internalList))
>> you should consider ImmutableListCopy instead.  Constructon time is  
>> about a tenth of the combined time it takes to create an ArrayList  
>> and then wrap it in an UnmodifiableList.  Also, iteration is very  
>> quick since the internal array is immutable.  Please keep this in  
>> mind when working on JBC code.
>> Cheers,
>> -- 
>> Manik Surtani
>> Lead, JBoss Cache
>> manik at jboss.org
>> _______________________________________________
>> jbosscache-dev mailing list
>> jbosscache-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/jbosscache-dev
>
>
> -- 
> Brian Stansberry
> Lead, AS Clustering
> JBoss, a division of Red Hat
> brian.stansberry at redhat.com

--
Manik Surtani
Lead, JBoss Cache
manik at jboss.org