X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=openflow-protocol-impl%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fopenflowjava%2Fprotocol%2Fimpl%2Fcore%2FVersionMessageWrapper.java;h=cdbe419c92866c5d658e5757686ece3ea238b3c6;hb=3d7142f71d50155111db46032776fa22260afafc;hp=a61298de454f145cf1ff2115e97224ffa96dbc7c;hpb=500a9c0bcea1ba5be7eea2094ad975a8ff6b4596;p=openflowjava.git

diff --git a/openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/VersionMessageWrapper.java b/openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/VersionMessageWrapper.java
index a61298de..cdbe419c 100644
--- a/openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/VersionMessageWrapper.java
+++ b/openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/VersionMessageWrapper.java
@@ -8,6 +8,7 @@
 
 package org.opendaylight.openflowjava.protocol.impl.core;
 
+import com.google.common.base.Preconditions;
 import io.netty.buffer.ByteBuf;
 
 /**
@@ -15,18 +16,17 @@ import io.netty.buffer.ByteBuf;
  * @author michal.polkorab
  */
 public class VersionMessageWrapper {
-
-    private short version;
-    private ByteBuf messageBuffer;
+    private final short version;
+    private final ByteBuf messageBuffer;
 
     /**
      * Constructor
      * @param version version decoded in {@link OFVersionDetector}
      * @param messageBuffer message received from {@link OFFrameDecoder}
      */
-    public VersionMessageWrapper(short version, ByteBuf messageBuffer) {
+    public VersionMessageWrapper(final short version, final ByteBuf messageBuffer) {
         this.version = version;
-        this.messageBuffer = messageBuffer;
+        this.messageBuffer = Preconditions.checkNotNull(messageBuffer);
     }
 
     /**
@@ -42,6 +42,4 @@ public class VersionMessageWrapper {
     public ByteBuf getMessageBuffer() {
         return messageBuffer;
     }
-
-
 }