Changing attribute of application

[abdul]

Hi all,
I want javassist to alter an attribute of the application at the run-time. anyone have a sample code will do that?

Ab

[chiba]

An attribute of the application?
Can you tell me what it is?

[abdul]

Chiba, I mean can i change and view a speciefic field on the base application during run-time?

[chiba]

I'm still confused. Doesn't the Reflection API satisfy
your requirement?

[abdul]

Chiba, thanks for your quick reply. An example will clear it, if i have a program doing A+B and the result I get it online. I need to know how to change A and get different reslut. Do you have an example? or which API will do this for me?

cheers

[anonym124]

If you want to intercept a field (during read or write access) you can easily use the JBoss AOP standalone framework based on Javassist.

If this is the real problem.

Hi.
Paolo

[chiba]

First, you can get a different result if you assign
a new value to A or B before evaluating A+B.
(Maybe this is not what you want. :-)

If you want to chage the behavior of field access
to A or B, yes, you can use JBoss AOP or directly
Javassist. If you use Javassist, please read Section
5.2 in the Javassist tutorial. javassist.expr.FieldAccess
should help you.

[abdul]

Great Help. thanks alot. i will try it and let you all know. thanks again