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From Simone Gianni <s.gia...@thebug.it>
Subject Re: JavaFlow and Objects
Date Sun, 26 Feb 2006 20:41:24 GMT
Hi Footh,
this error happens sometimes, it's connected (somehow) to the BCEL 
modifications javaflow applies to your classes to make the continuations 
magic possible.

This usually can be solved by explicit casting, expecially during 
variables declarations, for example :

Vector v = (Vector)null;

Sometimes it also happens on method calls (AFAIR, happened to me only 
once) :

((Vector)v).clear();

YMMV, but  usually this is the way.

Simone

footh wrote:

>I'm doing this in a javaflow:
>
>void doPages() {
>
>Vector myVec = null
>
>try {
>  myVec = new Vector();
>  // do stuff with myVec
>catch (Exception e) {
>}
>
>myVec.clear();
>
>}
>
>When I have the myVec.clear() statement, the flow
>causes this error in Tomcat (and, the page never
>renders):
>
>java.lang.VerifyError: (class:
>com/mycom/cocoon/flows/MainFlow, method: doPages
>signature: ()V) Incompatible object argument for
>function call
>
>The solution is to instantiate the Vector when it is
>declared outside of the try/catch.
>
>This isn't too big of a deal, but it cost me a lot of
>debugging time.  I'm wondering what might be causing
>it.
>
>(It actually came up with the VarMap I use as an
>argument to sendPage(), so it isn't just vectors.  It
>causes me to instantiate these objects outside of the
>try/catch, even though logic might be executed later
>that decides the object isn't even needed.)
>
>-JF
>
>
>
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>  
>
-- 
Simone Gianni


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