> From: Paulo Vitor [mailto:[email protected]]
> Subject: Re: A problem with tomcat 6.0.18
>
> the stack trace is:
>
> java.lang.IllegalArgumentException: Cannot convert 20 of type class
> java.lang.Integer to class java.lang.Number
> org.apache.el.lang.ELSupport.coerceToNumber(ELSupport.java:252)
> org.apache.el.lang.ELSupport.coerceToNumber(ELSupport.java:265)
> org.apache.el.lang.ELSupport.coerceToType(ELSupport.java:353)
I've just looked through the code in ElSupport, and I'm mystified as to why
much of it is there at all. In particular, the method:
static Number coerceToNumber(final Number number, final Class type)
doesn't appear to accomplish anything other than throw the exception that's
causing this particular grief. Since the object being tested is already known
to be a subclass of java.lang.Number, converting it to another subclass of
java.lang.Number seems to be a complete waste of time; the original object
should suffice to fulfill the contract of the API.
I've e-mailed the OP a modified version of ElSupport; put the .class file in
the proper subdirectory of Tomcat's lib directory, restart Tomcat, and see if
that addresses the problem.
As pid pointed out, a simple test case would help if and when this patch is
submitted for review.
- Chuck
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