[jboss-user] [Javassist user questions] - Re: adding annotations

[cat4hire]

I've found how to make the ClassFile working for defining my new class, but I'm still unable to add the annotation. Now I work as follows:
1) I create a CtClass object and set the inheritance chain on that;
2) I get the byte[] from the CtClass and place them into a ByteArrayInputStream, used to create a ClassFile;
3) I add the annotation to the classfile;
4) I get the byte[] from the classfile thru a ByteArrayOutputStream;
5) I load the class thru the defineClass method.

Now the class is of the right type, but it has no the annotation.
The following is my code; anyone has an idea of which is my error adding the annotation?


  | 		    subProxyClassName += this.getSubClassNameSuffix();
  | 		    
  | 		    // make a new class and prepare the annotation
  | 		    CtClass newProxyClass = pool.makeClass(subProxyClassName);
  | 		    newProxyClass.setSuperclass( baseProxyClass );
  | 		    ByteArrayInputStream is = new ByteArrayInputStream( newProxyClass.toBytecode() );
  | 		    DataInputStream dis = new DataInputStream( is );
  | 		    ClassFile classFile = new ClassFile( dis );
  | 		    newProxyClass.defrost();
  | 		    ConstPool constantPool = classFile.getConstPool();
  | 		    AnnotationsAttribute attribute = new AnnotationsAttribute( constantPool, AnnotationsAttribute.visibleTag );
  | 		    javassist.bytecode.annotation.Annotation annotation = new javassist.bytecode.annotation.Annotation( this.annotationClassName, constantPool );
  | 		    attribute.setAnnotation( annotation );
  | 		    classFile.addAttribute( attribute );
  | 		    classFile.setVersionToJava5();
  | 		    ByteArrayOutputStream bos = new ByteArrayOutputStream();
  | 		    DataOutputStream os = new DataOutputStream( bos );
  | 		    classFile.write( os );
  | new javassist.bytecode.annotation.Annotation( constantPool, subProxy );
  | 		    bytecode = bos.toByteArray();
  | 		    baseProxyClass = null;
  | 		    
  | ...		    
  | 
  | 		    Class clazz = this.defineClass(subProxyClassName, bytecode, 0, bytecode.length);
  | 
  | 

Thanks,
Luca

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