diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFVlanVidMatch.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFVlanVidMatch.java
new file mode 100644
index 0000000..29d6e02
--- /dev/null
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFVlanVidMatch.java
@@ -0,0 +1,183 @@
+package org.projectfloodlight.openflow.types;
+
+import javax.annotation.Nullable;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.projectfloodlight.openflow.exceptions.OFParseError;
+
+import com.google.common.hash.PrimitiveSink;
+import com.google.common.primitives.Shorts;
+
+/** Represents an OpenFlow Vlan VID for use in Matches, as specified by the OpenFlow 1.3 spec.
+ *
+ *  <b> Note: this is not just the 12-bit vlan tag. OpenFlow defines
+ *      the additional mask bits 0x1000 to represent the presence of a vlan
+ *      tag. This additional bit will be stripped when writing a OF1.0 value
+ *      tag.
+ *  </b>
+ *
+ *
+ * @author Andreas Wundsam <andreas.wundsam@bigswitch.com>
+ *
+ */
+public class OFVlanVidMatch implements OFValueType<OFVlanVidMatch> {
+
+    private static final short VALIDATION_MASK = 0x1FFF;
+    private static final short PRESENT_VAL = 0x1000;
+    private static final short VLAN_MASK = 0x0FFF;
+    private static final short NONE_VAL = 0x0000;
+    private static final short UNTAGGED_VAL_OF13 = (short) 0x0000;
+    private static final short UNTAGGED_VAL_OF10 = (short) 0xFFFF;
+    final static int LENGTH = 2;
+
+    /** presence of a VLAN tag is indicated by the presence of bit 0x1000 */
+    public static final OFVlanVidMatch PRESENT = new OFVlanVidMatch(PRESENT_VAL);
+
+    /** this value means 'not set' in OF1.0 (e.g., in a match). not used elsewhere */
+    public static final OFVlanVidMatch NONE = new OFVlanVidMatch(NONE_VAL);
+
+    /** for use with masking operations */
+    public static final OFVlanVidMatch NO_MASK = new OFVlanVidMatch((short)0xFFFF);
+    public static final OFVlanVidMatch FULL_MASK = NONE;
+
+    /** an untagged packet is specified as 0000 in OF 1.0, but 0xFFFF in OF1.0. Special case that. */
+    public static final OFVlanVidMatch UNTAGGED = new OFVlanVidMatch(NONE_VAL) {
+        @Override
+        public void write2BytesOF10(ChannelBuffer c) {
+            c.writeShort(UNTAGGED_VAL_OF10);
+        }
+    };
+
+    private final short vid;
+
+    private OFVlanVidMatch(short vid) {
+        this.vid = vid;
+    }
+
+    public static OFVlanVidMatch ofRawVid(short vid) {
+        if(vid == UNTAGGED_VAL_OF13)
+            return UNTAGGED;
+        else if(vid == PRESENT_VAL)
+            return PRESENT;
+        else if ((vid & VALIDATION_MASK) != vid)
+            throw new IllegalArgumentException(String.format("Illegal VLAN value: %x", vid));
+        return new OFVlanVidMatch(vid);
+    }
+
+    public static OFVlanVidMatch ofVlanVid(VlanVid vid) {
+        return ofVlan(vid.getVlan());
+    }
+
+
+    public static OFVlanVidMatch ofVlan(int vlan) {
+        if( (vlan & VLAN_MASK) != vlan)
+            throw new IllegalArgumentException(String.format("Illegal VLAN value: %x", vlan));
+        return ofRawVid( (short) (vlan | PRESENT_VAL));
+    }
+
+    public static OFVlanVidMatch ofVlanOF10(short of10vlan) {
+        if(of10vlan == NONE_VAL) {
+            return NONE;
+        } else if(of10vlan == UNTAGGED_VAL_OF10) {
+            return UNTAGGED;
+        } else {
+            return ofVlan(of10vlan);
+        }
+    }
+
+    /** @return whether or not this VlanId has the present (0x1000) bit set */
+    public boolean isPresentBitSet() {
+       return (vid & PRESENT_VAL) != 0;
+    }
+
+    /** @return the actual VLAN tag this vid identifies */
+    public short getVlan() {
+        return (short) (vid & VLAN_MASK);
+    }
+
+    /** @return the actual vlan tag this vid identifies as a VlanVid object, if this
+     *  VlanVidMatch has the present bit set (i.e., identifies a tagged VLAN).
+     *  Else, returns null.
+     */
+    @Nullable
+    public VlanVid getVlanVid() {
+        return isPresentBitSet() ? VlanVid.ofVlan((short) (vid & VLAN_MASK)) : null;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof OFVlanVidMatch))
+            return false;
+        OFVlanVidMatch other = (OFVlanVidMatch)obj;
+        if (other.vid != this.vid)
+            return false;
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        int prime = 13873;
+        return this.vid * prime;
+    }
+
+    @Override
+    public String toString() {
+        return "0x" + Integer.toHexString(vid);
+    }
+
+    public short getRawVid() {
+        return vid;
+    }
+
+
+    @Override
+    public int getLength() {
+        return LENGTH;
+    }
+
+
+    volatile byte[] bytesCache = null;
+
+    public byte[] getBytes() {
+        if (bytesCache == null) {
+            synchronized (this) {
+                if (bytesCache == null) {
+                    bytesCache =
+                            new byte[] { (byte) ((vid >>> 8) & 0xFF),
+                                         (byte) ((vid >>> 0) & 0xFF) };
+                }
+            }
+        }
+        return bytesCache;
+    }
+
+    public void write2Bytes(ChannelBuffer c) {
+        c.writeShort(this.vid);
+    }
+
+    public void write2BytesOF10(ChannelBuffer c) {
+        c.writeShort(this.getVlan());
+    }
+
+    public static OFVlanVidMatch read2Bytes(ChannelBuffer c) throws OFParseError {
+        return OFVlanVidMatch.ofRawVid(c.readShort());
+    }
+
+    public static OFVlanVidMatch read2BytesOF10(ChannelBuffer c) throws OFParseError {
+        return OFVlanVidMatch.ofVlanOF10(c.readShort());
+    }
+
+    @Override
+    public OFVlanVidMatch applyMask(OFVlanVidMatch mask) {
+        return OFVlanVidMatch.ofRawVid((short)(this.vid & mask.vid));
+    }
+
+    @Override
+    public int compareTo(OFVlanVidMatch o) {
+        return Shorts.compare(vid, o.vid);
+    }
+    @Override
+    public void putTo(PrimitiveSink sink) {
+        sink.putShort(vid);
+    }
+}
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFVlanVidMatchWithMask.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFVlanVidMatchWithMask.java
new file mode 100644
index 0000000..c91c28c
--- /dev/null
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFVlanVidMatchWithMask.java
@@ -0,0 +1,10 @@
+package org.projectfloodlight.openflow.types;
+
+public class OFVlanVidMatchWithMask extends Masked<OFVlanVidMatch> {
+    private OFVlanVidMatchWithMask(OFVlanVidMatch value, OFVlanVidMatch mask) {
+        super(value, mask);
+    }
+
+    /* a combination of Vlan Vid and mask that matches any tagged packet */
+    public final static OFVlanVidMatchWithMask ANY_TAGGED = new OFVlanVidMatchWithMask(OFVlanVidMatch.PRESENT, OFVlanVidMatch.PRESENT);
+}
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVid.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVid.java
index d370711..b63e4dc 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVid.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVid.java
@@ -6,45 +6,23 @@
 import com.google.common.hash.PrimitiveSink;
 import com.google.common.primitives.Shorts;
 
-/** Represents an OpenFlow Vlan VID, as specified by the OpenFlow 1.3 spec.
- *
- *  <b> Note: this is not just the 12-bit vlan tag. OpenFlow defines
- *      the additional mask bits 0x1000 to represent the presence of a vlan
- *      tag. This additional bit will be stripped when writing a OF1.0 value
- *      tag.
- *  </b>
- *
+/** Represents an 802.1Q Vlan VID (12 bits).
  *
  * @author Andreas Wundsam <andreas.wundsam@bigswitch.com>
  *
  */
 public class VlanVid implements OFValueType<VlanVid> {
 
-    private static final short VALIDATION_MASK = 0x1FFF;
-    private static final short PRESENT_VAL = 0x1000;
-    private static final short VLAN_MASK = 0x0FFF;
-    private static final short NONE_VAL = 0x0000;
-    private static final short UNTAGGED_VAL_OF13 = (short) 0x0000;
-    private static final short UNTAGGED_VAL_OF10 = (short) 0xFFFF;
+    private static final short VALIDATION_MASK = 0x0FFF;
+    private static final short ZERO_VAL = 0x0000;
     final static int LENGTH = 2;
 
-    /** presence of a VLAN tag is idicated by the presence of bit 0x1000 */
-    public static final VlanVid PRESENT = new VlanVid(PRESENT_VAL);
-
     /** this value means 'not set' in OF1.0 (e.g., in a match). not used elsewhere */
-    public static final VlanVid NONE = new VlanVid(NONE_VAL);
+    public static final VlanVid ZERO = new VlanVid(ZERO_VAL);
 
     /** for use with masking operations */
     public static final VlanVid NO_MASK = new VlanVid((short)0xFFFF);
-    public static final VlanVid FULL_MASK = NONE;
-
-    /** an untagged packet is specified as 0000 in OF 1.0, but 0xFFFF in OF1.0. Special case that. */
-    public static final VlanVid UNTAGGED = new VlanVid(NONE_VAL) {
-        @Override
-        public void write2BytesOF10(ChannelBuffer c) {
-            c.writeShort(UNTAGGED_VAL_OF10);
-        }
-    };
+    public static final VlanVid FULL_MASK = ZERO;
 
     private final short vid;
 
@@ -52,40 +30,15 @@
         this.vid = vid;
     }
 
-    public static VlanVid ofRawVid(short vid) {
-        if(vid == UNTAGGED_VAL_OF13)
-            return UNTAGGED;
-        else if(vid == PRESENT_VAL)
-            return PRESENT;
-        else if ((vid & VALIDATION_MASK) != vid)
+    public static VlanVid ofVlan(short vid) {
+        if ((vid & VALIDATION_MASK) != vid)
             throw new IllegalArgumentException(String.format("Illegal VLAN value: %x", vid));
         return new VlanVid(vid);
     }
 
-    public static VlanVid ofVlan(int vlan) {
-        if( (vlan & VLAN_MASK) != vlan)
-            throw new IllegalArgumentException(String.format("Illegal VLAN value: %x", vlan));
-        return ofRawVid( (short) (vlan | PRESENT_VAL));
-    }
-
-    public static VlanVid ofVlanOF10(short of10vlan) {
-        if(of10vlan == NONE_VAL) {
-            return NONE;
-        } else if(of10vlan == UNTAGGED_VAL_OF10) {
-            return UNTAGGED;
-        } else {
-            return ofVlan(of10vlan);
-        }
-    }
-
-    /** @return whether or not this VlanId has the present (0x1000) bit set */
-    public boolean isPresentBitSet() {
-       return (vid & PRESENT_VAL) != 0;
-    }
-
     /** @return the actual VLAN tag this vid identifies */
     public short getVlan() {
-        return (short) (vid & VLAN_MASK);
+        return vid;
     }
 
     @Override
@@ -109,17 +62,11 @@
         return "0x" + Integer.toHexString(vid);
     }
 
-    public short getRawVid() {
-        return vid;
-    }
-
-
     @Override
     public int getLength() {
         return LENGTH;
     }
 
-
     volatile byte[] bytesCache = null;
 
     public byte[] getBytes() {
@@ -144,22 +91,19 @@
     }
 
     public static VlanVid read2Bytes(ChannelBuffer c) throws OFParseError {
-        return VlanVid.ofRawVid(c.readShort());
-    }
-
-    public static VlanVid read2BytesOF10(ChannelBuffer c) throws OFParseError {
-        return VlanVid.ofVlanOF10(c.readShort());
+        return VlanVid.ofVlan(c.readShort());
     }
 
     @Override
     public VlanVid applyMask(VlanVid mask) {
-        return VlanVid.ofRawVid((short)(this.vid & mask.vid));
+        return VlanVid.ofVlan((short)(this.vid & mask.vid));
     }
 
     @Override
     public int compareTo(VlanVid o) {
         return Shorts.compare(vid, o.vid);
     }
+
     @Override
     public void putTo(PrimitiveSink sink) {
         sink.putShort(vid);
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVidWithMask.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVidWithMask.java
deleted file mode 100644
index cb81d31..0000000
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVidWithMask.java
+++ /dev/null
@@ -1,11 +0,0 @@
-package org.projectfloodlight.openflow.types;
-
-public class VlanVidWithMask extends Masked<VlanVid> {
-    private VlanVidWithMask(VlanVid value, VlanVid mask) {
-        super(value, mask);
-    }
-
-    /* a combination of Vlan Vid and mask that matches any tagged packet */
-    public final static VlanVidWithMask ANY_TAGGED = new VlanVidWithMask(VlanVid.PRESENT, VlanVid.PRESENT);
-
-}