Does Javassist really support the parameter variables $1 $2

[jclee49]

Hi,
I am trying to write a wrapper for the instrumented methods and print out the parameters ($1, $2 .... according to the javassist manual). The following is an extract of my code:

CtMethod mnew = CtNewMethod.copy(mold, methodName, clazz, null);
StringBuffer body = new StringBuffer();
:
body.append(nname + "($$);\n");
:
body.append("{ System.out.println($1); }");
mnew.setBody(body.toString());
clazz.addMethod(mnew);


And I am getting the following javassist compiling error, any clues out there. I am using version 2.6.

javassist.CannotCompileException: [source error] no such field: $1
at javassist.CtBehavior.setBody(CtBehavior.java:163)
at javassist.CtMethod.setBody(CtMethod.java:311)


Any info will be appreciated.

John

[chiba]

Is the source code given to setBody
a block surrounded by {}?

[jclee49]

Yes. As seen in this statement:
body.append("{ System.out.println($1); }");

[chiba]

Hmm... could you post a test case
that shows the bug?

Thanks in advance!