--- old/src/java.base/share/classes/sun/misc/JavaLangAccess.java	2015-01-10 13:43:10.492145041 +0100
+++ new/src/java.base/share/classes/sun/misc/JavaLangAccess.java	2015-01-10 13:43:10.397146934 +0100
@@ -29,6 +29,7 @@
 import java.lang.reflect.Executable;
 import java.security.AccessControlContext;
 import java.util.Map;
+import java.util.function.Function;
 
 import sun.reflect.ConstantPool;
 import sun.reflect.annotation.AnnotationType;
@@ -80,6 +81,14 @@
      */
     <E extends Enum<E>> E[] getEnumConstantsShared(Class<E> klass);
 
+    /**
+     * If given Class represents a generic class or interface, then the result of
+     * applying given function to the Class object is returned, otherwise null.
+     * The result is cached in per-Class map using identity of given key.
+     */
+    <D> D getGenericDerivative(Class<?> clazz, Object key,
+                               Function<Class<?>, ? extends D> function);
+
     /** Set thread's blocker field. */
     void blockedOn(Thread t, Interruptible b);