[ONOS-4258] Initial implementation of supporting extension in REST

- Support Nicira extension

Change-Id: I62bf4417e43459727ce7d4b1ac929c6cf0b7826f
diff --git a/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/NiciraResubmitTableCodec.java b/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/NiciraResubmitTableCodec.java
new file mode 100644
index 0000000..5a8eb73
--- /dev/null
+++ b/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/NiciraResubmitTableCodec.java
@@ -0,0 +1,65 @@
+/*
+ * 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.NiciraResubmitTable;
+import org.onosproject.net.PortNumber;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.util.Tools.nullIsIllegal;
+
+/**
+ * JSON Codec for NiciraResubmitTable class.
+ */
+public final class NiciraResubmitTableCodec extends JsonCodec<NiciraResubmitTable> {
+
+    private static final String RESUBMIT_PORT = "inPort";
+    private static final String RESUBMIT_TABLE = "table";
+
+    private static final String MISSING_MEMBER_MESSAGE = " member is required in NiciraResubmitTable";
+
+    @Override
+    public ObjectNode encode(NiciraResubmitTable niciraResubmitTable, CodecContext context) {
+        checkNotNull(niciraResubmitTable, "Nicira Resubmit Table cannot be null");
+        ObjectNode root = context.mapper().createObjectNode()
+                .put(RESUBMIT_PORT, niciraResubmitTable.inPort().toLong())
+                .put(RESUBMIT_TABLE, niciraResubmitTable.table());
+        return root;
+    }
+
+    @Override
+    public NiciraResubmitTable decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+
+        // parse in port number
+        long portNumberLong = nullIsIllegal(json.get(RESUBMIT_PORT),
+                RESUBMIT_PORT + MISSING_MEMBER_MESSAGE).asLong();
+        PortNumber portNumber = PortNumber.portNumber(portNumberLong);
+
+        // parse table id
+        short tableId = (short) nullIsIllegal(json.get(RESUBMIT_TABLE),
+                RESUBMIT_TABLE + MISSING_MEMBER_MESSAGE).asInt();
+
+        NiciraResubmitTable niciraResubmitTable = new NiciraResubmitTable(portNumber, tableId);
+
+        return niciraResubmitTable;
+    }
+}