[VOL-4050] Logging ONU Serial Number on ONOS Olt App

Change-Id: Icaf2a1c368c62420880b753ebd395a88962e725d
diff --git a/api/src/main/java/org/opencord/olt/AccessDevicePort.java b/api/src/main/java/org/opencord/olt/AccessDevicePort.java
new file mode 100644
index 0000000..8a1665d
--- /dev/null
+++ b/api/src/main/java/org/opencord/olt/AccessDevicePort.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2021-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.olt;
+
+import org.onosproject.net.AnnotationKeys;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Port;
+import org.onosproject.net.PortNumber;
+
+/**
+ * OLT device port.
+ */
+public class AccessDevicePort {
+
+    Port port;
+    Type type;
+
+    /**
+     * OLT Port Type.
+     */
+    public enum Type {
+        NNI,
+        UNI,
+    }
+
+    /**
+     * Creates an AccessDevicePort with given ONOS port object and OLT port type.
+     *
+     * @param port ONOS port
+     * @param type OLT port type
+     */
+    public AccessDevicePort(Port port, Type type) {
+        this.port = port;
+        this.type = type;
+    }
+
+    /**
+     * Get ONOS Port object.
+     *
+     * @return ONOS port
+     */
+    public Port port() {
+        return this.port;
+    }
+
+    /**
+     * Get OLT port Type.
+     *
+     * @return OLT port type
+     */
+    public Type type() {
+        return this.type;
+    }
+
+    /**
+     * Check port is enabled state on ONOS.
+     *
+     * @return is Access Device Port enabled
+     */
+    public boolean isEnabled() {
+        return this.port.isEnabled();
+    }
+
+    /**
+     * Get Device ID of OLT which the port is connected.
+     *
+     * @return OLT Device ID
+     */
+    public DeviceId deviceId() {
+        return (DeviceId) this.port.element().id();
+    }
+
+    /**
+     * Get port number.
+     *
+     * @return port number
+     */
+    public PortNumber number() {
+        return this.port.number();
+    }
+
+    /**
+     * Get port name which is combination of serial number and uni index.
+     *
+     * @return port name (ex: BBSM00010001-1)
+     */
+    public String name() {
+        return this.port.annotations().value(AnnotationKeys.PORT_NAME);
+    }
+
+    @Override
+    public String toString() {
+        return deviceId().toString() + '/' + number() + '[' + name() + ']';
+    }
+
+}