src/jdk.unsupported/share/classes/com/sun/nio/file/ExtendedOpenOption.java

@@ -45,11 +45,16 @@
      */
     NOSHARE_WRITE(ExtendedOptions.NOSHARE_WRITE),
     /**
      * Prevent operations on the file that request delete access.
      */
-    NOSHARE_DELETE(ExtendedOptions.NOSHARE_DELETE);
+    NOSHARE_DELETE(ExtendedOptions.NOSHARE_DELETE),
+
+    /**
+     * DirectIO.
+     */
+    DIRECT(ExtendedOptions.DIRECT);
 
     ExtendedOpenOption(ExtendedOptions.InternalOption<Void> option) {
         option.register(this);
     }
 }