Re: Question regarding JavaType existence

There's no exists() in IntelliJ API :o(

I think i'll spend the rest of the afternoon trying all PsiClass methods to
see if anything gets broken when i remove the jar from the classpath :o)

Oh well, it's all to a greater end... :o)


Cheers

Hugo

On 06/02/06, Geoff Longman <[email protected]> wrote:
>
> The  JDT's IType.exists()  just works in all cases :-)
>
> Actually, behind the scenes JDT is caching metadata  (using a
> complicated LRU cache) about the type. It detects the removal of
> classpath entries and invalidates the all the metadata it holds for,
> among other things, any IType in the removed entities (like jars).
>
> So, if later I call exists(), the metadata is gone and JDT tries to
> recreate it. But it can't (the jar is gone) so exists() returns false.
>
> The key to all the above is that JDT only looks at jars that are in
> the classpath. They can still be in the project but if they aren't in
> the classpath they are just files to JDT and not interesting at all.
>
> IDEA doesn't have a similar concept? perhaps the PSI tree for the type
> becomes inaccessible once the jar is removed from the classpath?
>
> Geoff
>
>
>
>
>
> On 2/6/06, Hugo Palma <[email protected]> wrote:
> > I was creating some tests and a problem came up with my implementation
> of
> > the exists() method of the IJavaType.
> >
> > Like you said before, the exists() should return false if the underlying
> > real type is deleted. This is easy when you're talking about source
> types,
> > but gets tricky when it comes to classpath types. The problem is that at
> the
> > time the type is returned the project has the library in it's classpath,
> > sometime after that it's possible that the library was removed from the
> > project classpath, althout the .jar is still there. The exists() method
> > should return false now. I checked your implementation in
> > com.iw.plugins.spindle.core.eclipse.lang.EclipseJavaType
> > and all you do is call the IType.exists() method. Does Eclipse
> > implementation provide this behaviour ?
> >
> > I can of course implement this behaviour but after i checked your
> > implementation to see how you handled this i just started to think if i
> > could be seeing problems where there are none.
> >
> >
> > Cheers
> >
> > Hugo
> >
>
>
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