ONOS-5718 Dynamic Config APIs with RPC and Notification support

Change-Id: I670890efee83c86c7a3b242783c0a62879059849
diff --git a/apps/config/src/main/java/org/onosproject/config/RpcInput.java b/apps/config/src/main/java/org/onosproject/config/RpcInput.java
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+++ b/apps/config/src/main/java/org/onosproject/config/RpcInput.java
@@ -0,0 +1,54 @@
+/*
+ * 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.config;
+
+import org.onosproject.config.model.DataNode;
+
+/**
+ * Abstraction for RPC input.
+ */
+public class RpcInput {
+    /**
+     * Input data to the RPC execution.
+     */
+    DataNode input;
+
+    /**
+     * TODO
+     * Any other meta data or contextual information
+     * to help the RPC execution can be here.
+     * Examples: List<DataNodes> to provide multiple inputs
+     * Additional info for the broker, to choose a suitable executor
+     */
+
+    /**
+     * Creates an instance of RpcInput.
+     *
+     * @param input to RPC execution
+     */
+    public RpcInput(DataNode input) {
+        this.input = input;
+    }
+
+    /**
+     * Returns RPC input.
+     *
+     * @return DataNode
+     */
+    public DataNode input() {
+        return this.input;
+    }
+}
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