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From Dain Sundstrom <d...@coredevelopers.net>
Subject Re: [XML Parsing]
Date Fri, 05 Sep 2003 17:44:37 GMT
On Friday, September 5, 2003, at 08:16 AM, Hiram Chirino wrote:

> I actually had to change the way that worked.  Seems like the Method[]
> the Class.getMethods() is in a different order if you run in different
> JVMs.  Well at least that's what I noticed.  So for now I'm sending  
> down
> a String the represents the method sig until I find a way to get an Int
> to represent the method.
>
> So how can we get 2 jvms to agree on the same ordinal number mapping??

Use the RMI hashing algorithm:

http://java.sun.com/products/jdk/1.2/docs/guide/rmi/spec/rmi- 
stubs.doc3.html

the string containing the remote method's name and descriptor would be  
the following:

	myRemoteMethod(ILjava.lang.Object;Z)V



The hash value is assembled from the first two 32-bit values of the  
SHA-1 message digest. If the result of the message digest, the five  
32-bit words H0 H1 H2 H3 H4, is in an array of five int values named  
sha, the hash value would be computed as follows:

long hash = ((sha[0] >>> 24) & 0xFF) |
             ((sha[0] >>> 16) & 0xFF) << 8 |
             ((sha[0] >>>  8) & 0xFF) << 16 |
             ((sha[0] >>>  0) & 0xFF) << 24 |
             ((sha[1] >>> 24) & 0xFF) << 32 |
             ((sha[1] >>> 16) & 0xFF) << 40 |
             ((sha[1] >>>  8) & 0xFF) << 48 |
             ((sha[1] >>>  0) & 0xFF) << 56;


=dain


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