SEBA-75: AAA app exposes authentication state machine events.

Change-Id: I9a1fbc0c28579f6b347322d6f7fc58635c1a9c8a
diff --git a/src/main/java/org/opencord/aaa/AuthenticationEvent.java b/src/main/java/org/opencord/aaa/AuthenticationEvent.java
new file mode 100644
index 0000000..da02ec2
--- /dev/null
+++ b/src/main/java/org/opencord/aaa/AuthenticationEvent.java
@@ -0,0 +1,63 @@
+/*
+ * 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.opencord.aaa;
+
+import org.onosproject.event.AbstractEvent;
+import org.onosproject.net.ConnectPoint;
+
+/**
+ * Event indicating the authentication state of a port has changed.
+ */
+public class AuthenticationEvent extends
+        AbstractEvent<AuthenticationEvent.Type, ConnectPoint> {
+
+    /**
+     * Authentication event type.
+     */
+    public enum Type {
+        /**
+         * Supplicant has started authentication on a port.
+         */
+        STARTED,
+
+        /**
+         * Supplicant has requested authentication on a port.
+         */
+        REQUESTED,
+
+        /**
+         * Authentication request was approved.
+         */
+        APPROVED,
+
+        /**
+         * Authentication request was denied.
+         */
+        DENIED
+    }
+
+    /**
+     * Creates a new authentication event.
+     *
+     * @param type event type
+     * @param connectPoint port
+     */
+    public AuthenticationEvent(Type type, ConnectPoint connectPoint) {
+        super(type, connectPoint);
+    }
+
+}