[jboss-user] [Javassist user questions] - Re: Altering Generics Information of Methods using Javassist

[Ugn]

I'am interested in reading return and parameter types like  Collection . With 
your suggestion it does not  work for me. I just get somer annotations an thats 
it. If I work with  mthod.getReturnType()  i get Collection but not Collection. 
Does someone have an idea how to solve this problem?

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[jboss-user] [Javassist user questions] - Re: Altering Generics Information of Methods using Javassist

[SimonRinguette]

I have done further reading on how this is implemented by the compiler and 
finally found out the answer I was looking for.

You can defenitely do that with javaassist. The key class is 
javassist.bytecode.SignatureAttribute.

From a CtMethod, i've obtained the methodInfo I add a Signature attribute. You 
can do it with something like:

CtMethod method = 
  | MethodInfo methodInfo = method.getMethodInfo();
  | SignatureAttribute signatureAttribute = new 
SignatureAttribute(methodInfo.getConstPool(),
  | ()Ljava/util/ListLjava/lang/String;;);
  | methodInfo.addAttribute(signatureAttribute);

If your more interesed in reading the signature with the generics inside, you 
can use the methodInfo.getAttribute(SignatureAttribute.tag).

I hope this helped.


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