Move internal classes under .impl package (1/2)

Change-Id: I72ed933ecd5ae7ffb268967f80fb395e90f7d8e9
diff --git a/protocols/netconf/api/src/main/java/org/onosproject/netconf/FilteringNetconfDeviceOutputEventListener.java b/protocols/netconf/api/src/main/java/org/onosproject/netconf/FilteringNetconfDeviceOutputEventListener.java
new file mode 100644
index 0000000..da5d51d
--- /dev/null
+++ b/protocols/netconf/api/src/main/java/org/onosproject/netconf/FilteringNetconfDeviceOutputEventListener.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2017-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.netconf;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Listener to listen for event about specific Device.
+ */
+public class FilteringNetconfDeviceOutputEventListener
+        implements NetconfDeviceOutputEventListener {
+
+    private static final Logger log =
+            LoggerFactory.getLogger(FilteringNetconfDeviceOutputEventListener.class);
+
+    private final NetconfDeviceInfo deviceInfo;
+
+    public FilteringNetconfDeviceOutputEventListener(NetconfDeviceInfo deviceInfo) {
+        this.deviceInfo = checkNotNull(deviceInfo);
+    }
+
+    @Override
+    public void event(NetconfDeviceOutputEvent event) {
+        switch (event.type()) {
+            case DEVICE_REPLY:
+                log.debug("Device {} has reply: {}", deviceInfo, event.getMessagePayload());
+                break;
+            case DEVICE_NOTIFICATION:
+                log.info("Device {} has notification: {}", deviceInfo, event.getMessagePayload());
+                break;
+            case DEVICE_UNREGISTERED:
+                log.warn("Device {} has closed session", deviceInfo);
+                break;
+            case DEVICE_ERROR:
+                log.warn("Device {} has error: {}", deviceInfo, event.getMessagePayload());
+                break;
+            case SESSION_CLOSED:
+                log.warn("Device {} has closed Session: {}", deviceInfo, event.getMessagePayload());
+                break;
+            default:
+                log.warn("Wrong event type {} ", event.type());
+        }
+
+    }
+
+    @Override
+    public boolean isRelevant(NetconfDeviceOutputEvent event) {
+        return deviceInfo.equals(event.getDeviceInfo());
+    }
+}
diff --git a/protocols/netconf/api/src/main/java/org/onosproject/netconf/NetconfDeviceInfo.java b/protocols/netconf/api/src/main/java/org/onosproject/netconf/NetconfDeviceInfo.java
index be76056..8ff65bf 100644
--- a/protocols/netconf/api/src/main/java/org/onosproject/netconf/NetconfDeviceInfo.java
+++ b/protocols/netconf/api/src/main/java/org/onosproject/netconf/NetconfDeviceInfo.java
@@ -41,6 +41,7 @@
     private int port;
     private char[] key;
     //File keyFile @deprecated 1.9.0
+    @Deprecated
     private File keyFile;
     private DeviceId deviceId;
 
@@ -121,7 +122,7 @@
     /**
      * Exposes the port of the controller.
      *
-     * @return int port address
+     * @return port number
      */
     public int port() {
         return port;