Full long value for port numbers. Fix port number serializer.

Change-Id: I106ce3d39533e22f5a9a0e6972b91f669068198b

@@ -49,16 +49,19 @@ public final class PortNumber {
 
     private final long number;
     private final String name;
+    private final boolean hasName;
 
     // Public creation is prohibited
     private PortNumber(long number) {
         this.number = number;
         this.name = UnsignedLongs.toString(number);
+        this.hasName = false;
     }
 
     private PortNumber(long number, String name) {
         this.number = number;
         this.name = name;
+        this.hasName = true;
     }
 
     /**
@@ -99,7 +102,11 @@ public final class PortNumber {
      * @return true if logical port number
      */
     public boolean isLogical() {
-        return number < 0 || number > MAX_NUMBER;
+        if (hasName) {
+            return false;
+        } else {
+            return (number < 0 || number > MAX_NUMBER);
+        }
     }
 
     /**
@@ -120,6 +127,16 @@ public final class PortNumber {
         return name;
     }
 
+    /**
+     * Indicates whether this port number was created with a port name,
+     * or only with a number.
+     *
+     * @return true if port was created with name
+     */
+    public boolean hasName() {
+        return hasName;
+    }
+
     private String decodeLogicalPort() {
         if (number == CONTROLLER_NUMBER) {
             return "CONTROLLER";

@@ -38,12 +38,19 @@ public final class PortNumberSerializer extends
 
     @Override
     public void write(Kryo kryo, Output output, PortNumber object) {
+        output.writeBoolean(object.hasName());
         output.writeLong(object.toLong());
+        if (object.hasName()) {
+            output.writeString(object.name());
+        }
     }
 
     @Override
-    public PortNumber read(Kryo kryo, Input input,
-            Class<PortNumber> type) {
+    public PortNumber read(Kryo kryo, Input input, Class<PortNumber> type) {
+        if (input.readBoolean()) {
+            return PortNumber.portNumber(input.readLong(), input.readString());
+        } else {
             return PortNumber.portNumber(input.readLong());
         }
+    }
 }