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Equivalent in IType for Class.isAssignableFrom() [message #248834]

Wed, 17 October 2007 03:00

Eclipse User

Originally posted by: diego.manilla.xeridia.com

Hi. I need to know if a given IType is a supertype of another IType, some
sort of equivalence in JDT for Class.isAssignableFrom(). What I've done is:

iType2.newSupertypeHierarchy(new NullProgressMonitor()).contains(iType1)

But this seems a pretty expensive operation, and I need to execute it many
times. Is there a faster way to do this?

Thanks in advance

Re: Equivalent in IType for Class.isAssignableFrom() [message #248897 is a reply to message #248834]

Thu, 18 October 2007 07:10

Eclipse User

Diego Manilla Suárez wrote:
> Hi. I need to know if a given IType is a supertype of another IType,
> some sort of equivalence in JDT for Class.isAssignableFrom(). What I've
> done is:
>
> iType2.newSupertypeHierarchy(new NullProgressMonitor()).contains(iType1)
>
> But this seems a pretty expensive operation, and I need to execute it
> many times. Is there a faster way to do this?
>
> Thanks in advance
>
If you need to do it for several types (let's say in a package), you can
build 1 type hierarchy on this packagage (see
IJavaProject#ITypeHierarchy newTypeHierarchy(IRegion region, IProgressMonitor monitor)
with the IRegion containing the IPackageFragmengt only). Then contains(...)
will be much faster.

Jerome

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