java_gen: add support for object hashing via the guava hash API
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/TransportPort.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/TransportPort.java
index 540ad1a..01019b0 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/TransportPort.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/TransportPort.java
@@ -3,6 +3,7 @@
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.projectfloodlight.openflow.exceptions.OFParseError;
 
+import com.google.common.hash.PrimitiveSink;
 import com.google.common.primitives.Ints;
 
 /**
@@ -87,4 +88,9 @@
         return Ints.compare(port,  o.port);
     }
 
+    @Override
+    public void putTo(PrimitiveSink sink) {
+        sink.putShort((short) port);
+    }
+
 }