--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/internal/dynalink/support/TypeUtilities.java	Mon Nov 03 07:29:46 2014 +0100
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/internal/dynalink/support/TypeUtilities.java	Mon Nov 03 09:49:52 2014 +0100
@@ -520,4 +520,13 @@
     public static Class<?> getWrapperType(final Class<?> primitiveType) {
         return WRAPPER_TYPES.get(primitiveType);
     }
+
+    /**
+     * Returns true if the passed type is a wrapper for a primitive type.
+     * @param type the examined type
+     * @return true if the passed type is a wrapper for a primitive type.
+     */
+    public static boolean isWrapperType(final Class<?> type) {
+        return PRIMITIVE_TYPES.containsKey(type);
+    }
 }