Re: [xmlvm-users] Using categories vs. encapsulation in Objective-C compat-lib

[Arno P. <ar...@pu...>]

there are always trait-offs when you map from one platform to another. 
The efficiency of using categories comes with the downside you've described.

We are currently working on cross-compiling the original JRE classes 
from OpenJDK. For one, it would give us instant 100% compatibility and 
the issues you have described would also be resolved. Note that this is 
ongoing work and will take some time to complete.

Arno


On 7/7/10 7:31 PM, bar...@ao... wrote:
>
> I think that having java_util_ArrayList.m be a category on
> NSMutableArray is a clever use of categories, but wouldn't encapsulation
> generally be a more flexible option? One potential issue I see with the
> category approach is that since java_util_ArrayList.m and
> java_util_LinkedList.m are both categories on NSMutableArray, what
> happens if the client java code relies on checking the kind of the list
> using reflection? Won't java_util_ArrayList and java_util_LinkedList
> then be indistinguishable from each other at runtime?
>
> The same goes for the other classes where categories are used: String,
> StringBuffer, HashMap/Set, URI/URL, etc.
>
>
>
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