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What is the best way to find an interface for Java classes [message #506476]

Thu, 07 January 2010 06:28

Eclipse User

Hi All,

I have a workspace which contains a lot of Java classes, for those Java classes, I need to find out those that implements/extends a particular interface. since my code is performance sensitive, I need to find out the fastest way for doing this search. I've tried some APIs:
1. IType.getSuperInterfaceNames(),
this one only returns the direct interfaces (not working for me)
2. ITypeHierarchy hierarchy = classType.newSupertypeHierarchy(null);
IType[] interfaces = hierarchy.getAllInterfaces();
This one works for me, but my question is will "newSupertypeHierarchy" be expensive when doing the search for each class?

Does any one know any other better ways? Thanks for your help and appreciate it.

Re: What is the best way to find an interface for Java classes [message #506485 is a reply to message #506476]

Thu, 07 January 2010 11:39

Eclipse User

Benson Ning wrote:
> Hi All,
>
> I have a workspace which contains a lot of Java classes, for those
> Java classes, I need to find out those that implements/extends a
> particular interface. since my code is performance sensitive, I need
> to find out the fastest way for doing this search. I've tried some
> APIs: 1. IType.getSuperInterfaceNames(), this one only returns the
> direct interfaces (not working for me)
> 2. ITypeHierarchy hierarchy = classType.newSupertypeHierarchy(null);
> IType[] interfaces = hierarchy.getAllInterfaces();
> This one works for me, but my question is will "newSupertypeHierarchy"
> be expensive when doing the search for each class?
>
> Does any one know any other better ways?
Use the org.eclipse.jdt.core.search.SearchEngine.

Dani
> Thanks for your help and appreciate it.

Re: What is the best way to find an interface for Java classes [message #506490 is a reply to message #506476]

Thu, 07 January 2010 12:11

Eclipse User

thanks for the reply, may be one more thing I need to clarify, I am looking for the way for the IType level. Can the SearchEngine do the search only for one IType? Thanks for your time.

Re: What is the best way to find an interface for Java classes [message #506494 is a reply to message #506490]

Thu, 07 January 2010 12:41

Eclipse User

Benson Ning wrote:
> thanks for the reply, may be one more thing I need to clarify, I am
> looking for the way for the IType level. Can the SearchEngine do the
> search only for one IType?
Sure.

Dani
> Thanks for your time.

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