Added FULL_MASK, NO_MASK constant values for each value type.
diff --git a/java_gen/pre-written/src/main/java/org/openflow/types/IpEcn.java b/java_gen/pre-written/src/main/java/org/openflow/types/IpEcn.java
index 90600df..dfcce51 100644
--- a/java_gen/pre-written/src/main/java/org/openflow/types/IpEcn.java
+++ b/java_gen/pre-written/src/main/java/org/openflow/types/IpEcn.java
@@ -7,8 +7,12 @@
     ECN_00((byte)0),
     ECN_01((byte)1),
     ECN_10((byte)2),
-    ECN_11((byte)3);
+    ECN_11((byte)3),
+    ECN_FULL_MASK((byte)0xFF);
     
+    public static final IpEcn FULL_MASK = ECN_FULL_MASK;
+    public static final IpEcn NO_MASK = ECN_00;
+
     static final int LENGTH = 1;
     
     private final byte ecn;