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