Could the extend method be failing because it does not return a value?
On Feb 19, 2008 9:31 AM, Robin Helgelin <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I'm trying to do a simple prefix and extend to a single method,
> however, it seems that ClassTransformation.extendMethod(), doesn't
> find variables declared with prefixMethod().
>
> Simple example which throws a javassist.CannotCompileException:
>
> transformation.prefixMethod(method, "int i = 1;");
> transformation.extendMethod(method, "i += 1;");
>
> I also tried expanding the method by wrapping it, but that seems to
> break @Persist:et members. I attach my attempt. It seems the problem
> is that Tapestry only scans the new method, not the old one copied, am
> I correct?
>
> public void renameAndExtendMethod(TransformMethodSignature
> methodSignature, String newMethodName, String methodBody)
> {
> failIfFrozen();
>
> CtMethod methodOld = findMethod(methodSignature);
> methodOld.setName(newMethodName);
>
> CtMethod methodNew;
> try
> {
> methodNew = CtNewMethod.copy(methodOld,
> methodSignature.getMethodName(),
> _ctClass,
> null);
> methodNew.setBody(methodBody);
> _ctClass.addMethod(methodNew);
> }
> catch (CannotCompileException ex)
> {
> throw new
> MethodCompileException(ServicesMessages.methodCompileError(
> methodSignature,
> methodBody,
> ex), methodBody, ex);
> }
>
> addMethodToDescription("renameAndExtend", methodSignature,
> methodBody);
> _addedMethods.add(methodOld);
> }
>
> --
> regards,
> Robin
>
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>
--
Howard M. Lewis Ship
Creator Apache Tapestry and Apache HiveMind
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