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Re: [p2-dev] Extending classes with generics
|
Thomas Hallgren a écrit :
> On 2010-01-04 22:54, Curtis Windatt wrote:
>> Recently a number of the query API were changed to use generics, this
>> causes some annoyances in PDE (as we are strictly 1.4), but up until
>> now I can work around them. However, I have a problem extending a
>> class with generics, specifically MatchQuery
>>
>> IQuery query = new MatchQuery() {
>> public boolean isMatch(Object candidate) {
>> if (candidate instanceof
>> IInstallableUnit) {
>> if
>> (P2Utils.isBundle((IInstallableUnit) candidate)) {
>> return true;
>> }
>> }
>> return false;
>> }
>> };
>>
>> The compiler complains that I need to extend the isMatch(T candidate)
>> instead, but I am unable to use generics in PDE.
>>
> I noticed that error too. It's a strange error though. It manifests
> itself as a marker but the code compiles just fine. IMO, this indicates
> a problem with the compiler since it shouldn't know about generics when
> compiling for 1.4.
I got the same problems when I use SAT4J source code (1.5) instead of
SAT4J libraries (1.4) in my workspace.
> Perhaps it's related to the 1.5 workspace compilation of the p2 bundles?
> If so, the marker will go away once we tweak the preference setting to
> get 1.4 binaries in the workspace.
I guess you are correct.
The problem is to "tweak" the preference settings. Why not supporting
directly jsr14 as a valid bytecode target?
Daniel
--
Daniel Le Berre mailto:leberre@xxxxxxxxxxxxxxxxxxx
MCF, CRIL-CNRS UMR 8188, Universite d'Artois
http://www.cril.univ-artois.fr/~leberre