[CORD-545] Adds QoS Index support in ONOS core

Change-Id: If7649bdf70f5a796466b8efc5798dc3346ea94a0
diff --git a/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/Ofdpa3SetQosIndexCodec.java b/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/Ofdpa3SetQosIndexCodec.java
new file mode 100644
index 0000000..740c7d6
--- /dev/null
+++ b/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/Ofdpa3SetQosIndexCodec.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2016-present 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.driver.extensions.codec;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.driver.extensions.Ofdpa3SetQosIndex;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.util.Tools.nullIsIllegal;
+
+/**
+ * JSON Codec for Ofdpa set qos index class.
+ */
+public class Ofdpa3SetQosIndexCodec extends JsonCodec<Ofdpa3SetQosIndex>  {
+
+    private static final String QOS_INDEX = "qosIndex";
+
+    private static final String MISSING_MEMBER_MESSAGE = " member is required in Ofdpa3SetQosIndex";
+    private static final String MISSING_QOS_INDEX_TYPE_MESSAGE = "qosIndex cannot be null";
+
+    @Override
+    public ObjectNode encode(Ofdpa3SetQosIndex qosIndex, CodecContext context) {
+        checkNotNull(qosIndex, MISSING_QOS_INDEX_TYPE_MESSAGE);
+        return context.mapper().createObjectNode()
+                .put(QOS_INDEX, qosIndex.qosIndex());
+    }
+
+    @Override
+    public Ofdpa3SetQosIndex decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+
+        // parse ofdpa qos index
+        int qosIndex = (int) nullIsIllegal(json.get(QOS_INDEX),
+                QOS_INDEX + MISSING_MEMBER_MESSAGE).asInt();
+        return new Ofdpa3SetQosIndex(qosIndex);
+    }
+}