1 import com.sun.xml.internal.ws.org.objectweb.asm.*;

     2 

     3 class Asmator {

     4     static byte[] fixup(byte[] buf) throws java.io.IOException {

     5         ClassReader cr = new ClassReader(buf);

     6         ClassWriter cw = new ClassWriter(0) {

     7             public MethodVisitor visitMethod(

     8                 final int access,

     9                 final String name,

    10                 final String desc,

    11                 final String signature,

    12                 final String[] exceptions)

    13             {

    14                 MethodVisitor mv = super.visitMethod(access,

    15                         name,

    16                         desc,

    17                         signature,

    18                         exceptions);

    19                 if (mv == null)  return null;

    20                 if (name.equals("callme")) {

    21                     // make receiver go dead!

    22                     mv.visitInsn(Opcodes.ACONST_NULL);

    23                     mv.visitVarInsn(Opcodes.ASTORE, 0);

    24                 }

    25                 return mv;

    26             }

    27         };

    28         cr.accept(cw, 0);

    29         return cw.toByteArray();

    30     }

    31 }