!7

set flag AllPublic.

p {

  ClassGen cg = new("User123", "java.lang.Object", null,

    Const.ACC_PUBLIC, new S[] { className(IF0) });

  cg.addEmptyConstructor(Const.ACC_PUBLIC);

  // make code for get() method

  var m = new MethodMaker(cg, "get", O);

  // declare and create StringBuffer

  int buffer = m.newLocalVar();

  m.newObject(StringBuffer.class).astore(buffer);

  // Append two strings

  for (string : ll("Hello ", "world")) {

    m.aload(buffer).stringConstant(string);

    m.il.append(m.factory.createAppend(org.apache.bcel.generic.Type.OBJECT));

  }

  // call StringBuffer.toString() and return

  m.aload(buffer);

  m.invokeVirtual(StringBuffer.class, "toString", S);

  m.areturn().done();

  // bake class

  JavaClass baked = cg.getJavaClass();

  // print class overview

  print(baked);

  // print the methods

  for (method : baked.getMethods()) {

    print("\n" + method);

    print(method.getCode());

  }

  byte[] bytes = baked.getBytes();

  var cl = new InMemoryClassLoader(myClassLoader());

  time "Defining class" {

    Class<? extends IF0> c = cast cl.defineAClass("User123", bytes);

  }

  print(c);

  IF0 f = newInstance(c);

  print(f);

  assertEqualsVerbose("Hello world", f!);

}