[ONOS-3253/3144] Insert support for Netconf device configuration, set and get controllers commands

Change-Id: I99188aa18207b9d0b0d935b9f9e61e547f4ddab1
diff --git a/netconf/api/src/main/java/org/onosproject/netconf/NetconfDevice.java b/netconf/api/src/main/java/org/onosproject/netconf/NetconfDevice.java
new file mode 100644
index 0000000..1974782
--- /dev/null
+++ b/netconf/api/src/main/java/org/onosproject/netconf/NetconfDevice.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2015 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.netconf;
+
+/**
+ * Interface representing a NETCONF device.
+ */
+public interface NetconfDevice {
+
+
+    /**
+     * Returns whether a device is a NETCONF device with a capabilities list
+     * and is accessible.
+     *
+     * @return true if device is accessible, false otherwise
+     */
+    boolean isActive();
+
+    /**
+     * Returns a NETCONF session context for this device.
+     *
+     * @return netconf session
+     */
+    NetconfSession getSession();
+
+    /**
+     * Ensures that all sessions are closed.
+     * A device cannot be used after disconnect is called.
+     */
+    void disconnect();
+
+    /**
+     * return all the info associated with this device.
+     * @return NetconfDeviceInfo
+     */
+    NetconfDeviceInfo getDeviceInfo();
+}
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