ONOS-3961 ONOS-4285 Implemented BMv2 drivers and protocol

Provides Thrift-based implementation for FlowRuleProgrammable and
PortDiscovery behaviours.

Change-Id: Ibbf8720d92301bcd23c5c583d156f464015ff1ef
diff --git a/protocols/bmv2/src/main/java/org/onosproject/bmv2/api/Bmv2ExtensionSelector.java b/protocols/bmv2/src/main/java/org/onosproject/bmv2/api/Bmv2ExtensionSelector.java
new file mode 100644
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--- /dev/null
+++ b/protocols/bmv2/src/main/java/org/onosproject/bmv2/api/Bmv2ExtensionSelector.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2014-2016 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.bmv2.api;
+
+import org.onlab.util.KryoNamespace;
+import org.onosproject.net.flow.AbstractExtension;
+import org.onosproject.net.flow.criteria.ExtensionSelector;
+import org.onosproject.net.flow.criteria.ExtensionSelectorType;
+
+public class Bmv2ExtensionSelector extends AbstractExtension implements ExtensionSelector {
+
+    private final KryoNamespace appKryo = new KryoNamespace.Builder().build();
+    private Bmv2MatchKey matchKey;
+
+    public Bmv2ExtensionSelector(Bmv2MatchKey matchKey) {
+        this.matchKey = matchKey;
+    }
+
+    public Bmv2MatchKey matchKey() {
+        return matchKey;
+    }
+
+    @Override
+    public ExtensionSelectorType type() {
+        return ExtensionSelectorType.ExtensionSelectorTypes.P4_BMV2_MATCH_KEY.type();
+    }
+
+    @Override
+    public byte[] serialize() {
+        return appKryo.serialize(matchKey);
+    }
+
+    @Override
+    public void deserialize(byte[] data) {
+        matchKey = appKryo.deserialize(data);
+    }
+}