--- old/src/share/vm/runtime/java.hpp	2015-02-03 13:44:00.537032121 -0500
+++ new/src/share/vm/runtime/java.hpp	2015-02-03 13:44:00.025002771 -0500
@@ -138,6 +138,14 @@
   static JDK_Version jdk_update(uint8_t major, uint8_t update_number) {
     return JDK_Version(major, 0, 0, update_number);
   }
+  
+  static JDK_Version undefined() {
+    return JDK_Version(0);
+  }
+  
+  bool is_undefined() const {
+    return (_major == 0);
+  }
 
   uint8_t major_version() const          { return _major; }
   uint8_t minor_version() const          { return _minor; }