Add device driver for ODTN Phase1.0

Change-Id: Ie1b224f3bc5896d0b4d547b5f90257fc589347da
diff --git a/apps/odtn/api/src/main/java/org/onosproject/odtn/behaviour/OdtnTerminalDeviceDriver.java b/apps/odtn/api/src/main/java/org/onosproject/odtn/behaviour/OdtnTerminalDeviceDriver.java
new file mode 100644
index 0000000..46179ed
--- /dev/null
+++ b/apps/odtn/api/src/main/java/org/onosproject/odtn/behaviour/OdtnTerminalDeviceDriver.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.odtn.behaviour;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+
+/**
+ * Device driver interface for ODTN Phase1.0.
+ */
+@Beta
+public interface OdtnTerminalDeviceDriver {
+
+    enum Operation {
+        CREATE("create"),
+        MERGE("merge"),
+        DELETE("delete");
+
+        private final String value;
+
+        Operation(String op) {
+            this.value = op;
+        }
+
+        public String value() {
+            return this.value;
+        }
+
+    }
+
+    /**
+     * Configure terminal device.
+     *
+     * @param did    Device ID
+     * @param client side port of transceiver to enable/disable
+     * @param line   side port of transceiver to enable/disable
+     * @param enable or disable
+     */
+    void apply(DeviceId did, PortNumber client, PortNumber line, boolean enable);
+}
diff --git a/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/YangToolUtil.java b/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/YangToolUtil.java
index 0ec9985..b0d56cb 100644
--- a/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/YangToolUtil.java
+++ b/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/YangToolUtil.java
@@ -294,6 +294,7 @@
      * @return DataNode
      */
     public static DataNode toDataNode(ModelObject input) {
+        // FIXME this converter will work with root-level nodes only.
         initStaticContext();
         ModelObjectData modelData = DefaultModelObjectData.builder()
                 .addModelObject(input)