On Nov 20, 10:47 am, "Michael Wood" <[EMAIL PROTECTED]> wrote:
> Hi
>
>
>
> On Thu, Nov 20, 2008 at 12:10 AM, Chouser <[EMAIL PROTECTED]> wrote:
>
> > On Wed, Nov 19, 2008 at 4:00 AM, Michael Wood <[EMAIL PROTECTED]> wrote:
>
> >> Exception in thread "main" java.lang.IllegalArgumentException: No
> >> matching method found: getString for class
> >> org.dcm4che2.data.BasicDicomObject (dinfo.clj:0)
>
> > This was discussed on IRC:
>
> >http://clojure-log.n01se.net/date/2008-11-19.html#15:46a-16:07
>
> > So it looks like there may be no good, general, solution. Unless or
> > until there is, there's a work-around using reflection manually.
>
> > Start by getting a reference to the Method you're trying to call:
>
> > (def bdo-get-string (.getMethod (identity BasicDicomObject)
> > "getString" (into-array [Integer/TYPE])))
>
> Thanks. That works fine. I'll use that in the mean time.
>
>
>
> > The three args to .getMethods are:
> > 1. The class (use identity to get the instance of Class instead of
> > trying to BasicDicomObject's non-existent getMethod method)
> > 2. The name of the method as a string, "getString"
> > 3. An array of the argument types for the method you want to call.
> > Use Interger/TYPE to specify the primitive 'int'
>
> > You can then call the method you found above using the .invoke method
> > of the Method instance:
>
> > (.invoke bdo-get-string (BasicDicomObject.) (to-array [0x00100010]))
>
> > The .invoke method always takes 3 args:
> > 1. The Method instance we got earlier
> > 2. The instance of the class you want call (in this example I created
> > a new instance on the spot)
> > 3. And array holding all the args to pass to the Method.
>
> Thanks for the explanation.
>
> > Not too pretty, but of course if you find you actually need this you
> > can wrap either step in a function to make calling it more pleasant.
>
> Yes, I've changed print-tag from:
>
> (defn print-tag [dcm tag]
> (.getString dcm tag))
>
> to:
>
> (defn print-tag [dcm tag]
> (def bdo-get-string
> (.getMethod
> (identity BasicDicomObject) "getString" (into-array [Integer/TYPE])))
> (.invoke bdo-get-string dcm (to-array [tag])))
>
> --
SVN rev 1119 has my latest attempt to reconcile these bridge methods,
trying to make all of these work:
http://groups.google.com/group/clojure/browse_frm/thread/a4e1b58061962479/23a1efe8d9f45eb3
http://groups.google.com/group/clojure/browse_frm/thread/ee1c729f1577d530/a21fbfedafb1998b
http://groups.google.com/group/clojure/browse_frm/thread/c584c41ebe1caaf2/03ac73e2abd8e425#03ac73e2abd8e425
without breaking anything else.
Please let me know the effects, positive or negative, on method
resolution.
Rich
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