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Date: Fri, 04 Sep 2009 10:07:16 +0100
From: Tim Ellison <t.p.ellison@gmail.com>
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To: dev@harmony.apache.org
Subject: Re: [jira] Commented: (HARMONY-6331) [classlib][beans] remove
 	XMLDecoderTest
 from the exclude list
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On 04/Sep/2009 08:26, Charles Lee wrote:
> Thanks Regis.
> 
> The testcase will *pass* on ri and harmony+vme. But failed on harmony+drlvm.
> The reason cause this difference is due to differenct order returned by the
> Class.getMethods.
> It seems findMethod in XMLDecoder shoud fix this problem, because it should
> be order free.
> 
> Also I use "*" around the word "pass" when I mentioned result using harmony
> + vme. It is a fake pass. The exception it throw is "Cannot decide which
> method to call to match get" due to the specific method order it get. The
> senario as follows:
> 
> Class A has four method:
> 1. test(int, String)
> 2. test(Integer, Object)
> 3. test(Object, String)
> 4. test(String, Object)
> 
> I want to invoke the test with arg null and "aaa", that is
> method.invoke(null, "aaa"). Which method should be invoked?
> RI: NoSuchMethodException
> vme: (mothed order is 4, 1, 2, 3), "Cannot decide which method to call to
> match get", because method 4 and method 2 has the same distance.
> drlvm: (mothd order is 1, 2, 3, 4), method 3 is invoked because it has the
> smallest distance.
> 
> My question is: which method should be invoked?

Is this a quiz, or are you asking for an opinion?  I would hope that the
correct answer could be determined from the Beans spec, otherwise we
should follow the RI's behavior.

I would guess 3, since null is a valid actual parameter for an Object
formal parameter (and an int is not) and String matches exactly.

I don't think the order should matter.

However, I'm not so familiar with the spec to say whether my 'logical
answer' is the one the spec would give you.

Regards,
Tim