diff --git a/java_gen/pre-written/src/main/java/org/openflow/types/TransportPort.java b/java_gen/pre-written/src/main/java/org/openflow/types/TransportPort.java
new file mode 100644
index 0000000..86ed53e
--- /dev/null
+++ b/java_gen/pre-written/src/main/java/org/openflow/types/TransportPort.java
@@ -0,0 +1,92 @@
+package org.openflow.types;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.openflow.exceptions.OFParseError;
+
+/**
+ * Represents L4 (Transport Layer) port (TCP, UDP, etc.)
+ * 
+ * @author Yotam Harchol (yotam.harchol@bigswitch.com)
+ */
+public class TransportPort implements OFValueType {
+    
+    static final int LENGTH = 2;
+    static final int MAX_PORT = 0xFFFF;
+    static final int MIN_PORT = 0;
+    
+    private final int port;
+    
+    private TransportPort(int port) {
+        this.port = port;
+    }
+    
+    public static TransportPort of(int port) {
+        if (port < MIN_PORT || port > MAX_PORT) {
+            throw new IllegalArgumentException("Illegal transport layer port number: " + port);
+        }
+        return new TransportPort(port);
+    }
+
+    @Override
+    public int getLength() {
+        return LENGTH;
+    }
+    
+    volatile byte[] bytesCache;
+    
+    @Override
+    public byte[] getBytes() {
+        if (bytesCache == null) {
+            synchronized (this) {
+                if (bytesCache == null) {
+                    bytesCache = new byte[] { (byte)(port & 0xFF),
+                                              (byte)((port >>> 8) & 0xFF)};
+                }
+            }
+        }
+        return bytesCache;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof TransportPort))
+            return false;
+        TransportPort other = (TransportPort)obj;
+        if (other.port != this.port)
+            return false;
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 59;
+        int result = 1;
+        result = prime * result + port;
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return Integer.toString(port);
+    }
+
+    public static final Serializer<TransportPort> SERIALIZER_V10 = new SerializerV10();
+    public static final Serializer<TransportPort> SERIALIZER_V11 = SERIALIZER_V10;
+    public static final Serializer<TransportPort> SERIALIZER_V12 = SERIALIZER_V10;
+    public static final Serializer<TransportPort> SERIALIZER_V13 = SERIALIZER_V10;
+
+    private static class SerializerV10 implements OFValueType.Serializer<TransportPort> {
+
+        @Override
+        public void writeTo(TransportPort value, ChannelBuffer c) {
+            c.writeShort(value.port);
+        }
+
+        @Override
+        public TransportPort readFrom(ChannelBuffer c) throws OFParseError {
+            return TransportPort.of((c.readUnsignedShort() & 0x0FFFF));
+        }
+
+    }
+
+}