test/lib/testlibrary/jsr292/com/oracle/testlibrary/jsr292/Helper.java

*** 313,318 ****
--- 313,347 ----
          if (dst == boolean.class || dst == Boolean.class) {
              return ((value % 29) & 1) == 0;
          }
          return null;
      }
+     
+     /**
+      * Routine used to obtain a randomly generated method type.
+      *
+      * @param arity Arity of returned method type.
+      * @return MethodType generated randomly.
+      */
+     public static MethodType randomMethodTypeGenerator(int arity) {
+         final Class<?>[] CLASSES = {
+             Object.class,
+             int.class,
+             boolean.class,
+             byte.class,
+             short.class,
+             char.class,
+             long.class,
+             float.class,
+             double.class
+         };
+         if (arity > MAX_ARITY) {
+             throw new IllegalArgumentException(
+                     String.format("Arity should not exceed %d!", MAX_ARITY));
+         }
+         List<Class<?>> list = randomClasses(CLASSES, arity);
+         list = getParams(list, false, arity);
+         int i = RNG.nextInt(CLASSES.length + 1);
+         Class<?> rtype = i == CLASSES.length ? void.class : CLASSES[i];
+         return MethodType.methodType(rtype, list);
+     }
  }