automatical modification of class and method Annotation

I'm using Javassist to create .class file at runtime. Every method of the created class must have a Java Annotation ("@annotation example") with an URI. The problem is that the Annotation class modifies automatically the URI by substituting slashes with dots.

//the Annotation String that I need
@RDFBean('http://www.semanticweb.org/pi/2014/5/test#Test')
//the resulting String
@RDFBean('http:..www.semanticweb.org.pi.2014.5.test#Test')

Is there a way to prevent this String modification?
I suppose it's related to the different notation between a file path and a Java package.

This is the code:

ClassPool pool = ClassPool.getDefault();
CtClass cc = pool.makeClass(className);

ClassFile ccFile = cc.getClassFile();
ConstPool constpool = ccFile.getConstPool();

// create the annotation
AnnotationsAttribute attr = new AnnotationsAttribute(constpool, AnnotationsAttribute.visibleTag);
// classLocalName contains: http://www.semanticweb.org/pi/2014/5/test#Test
Annotation annot = new Annotation("RDFBean('" + classLocalName + "')", constpool);
attr.addAnnotation(annot);
ccFile.addAttribute(attr);