ONOS-4078: ISIS protocol API initial checkin.

Change-Id: I89743341348148835dc196321852945a20469c87
diff --git a/protocols/isis/api/src/main/java/org/onosproject/isis/controller/IsisInterface.java b/protocols/isis/api/src/main/java/org/onosproject/isis/controller/IsisInterface.java
new file mode 100644
index 0000000..d1fec1c
--- /dev/null
+++ b/protocols/isis/api/src/main/java/org/onosproject/isis/controller/IsisInterface.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2016 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.isis.controller;
+
+/**
+ * Representation of an ISIS interface.
+ */
+public interface IsisInterface {
+
+    /**
+     * Sets interface index.
+     *
+     * @param interfaceIndex interface index
+     */
+    void setInterfaceIndex(int interfaceIndex);
+
+    /**
+     * Sets intermediate system name.
+     *
+     * @param intermediateSystemName intermediate system name
+     */
+    void setIntermediateSystemName(String intermediateSystemName);
+
+    /**
+     * Sets system ID.
+     *
+     * @param systemId system ID
+     */
+    void setSystemId(String systemId);
+
+    /**
+     * Sets LAN ID.
+     *
+     * @param lanId LAN ID
+     */
+    void setLanId(String lanId);
+
+    /**
+     * Sets ID length.
+     *
+     * @param idLength ID length
+     */
+    void setIdLength(int idLength);
+
+    /**
+     * Sets max area addresses.
+     *
+     * @param maxAreaAddresses max area addresses
+     */
+    void setMaxAreaAddresses(int maxAreaAddresses);
+
+    /**
+     * Sets reserved packet circuit type.
+     *
+     * @param reservedPacketCircuitType reserved packet circuit type
+     */
+    void setReservedPacketCircuitType(int reservedPacketCircuitType);
+
+    /**
+     * Sets point to point.
+     *
+     * @param p2p point to point
+     */
+    void setP2p(int p2p);
+
+    /**
+     * Sets area address.
+     *
+     * @param areaAddress area address
+     */
+    void setAreaAddress(String areaAddress);
+
+    /**
+     * Sets area length.
+     *
+     * @param areaLength area length
+     */
+    void setAreaLength(int areaLength);
+
+    /**
+     * Sets link state packet ID.
+     *
+     * @param lspId link state packet ID
+     */
+    void setLspId(String lspId);
+
+    /**
+     * Sets holding time.
+     *
+     * @param holdingTime holding time
+     */
+    void setHoldingTime(int holdingTime);
+
+    /**
+     * Sets priority.
+     *
+     * @param priority priority
+     */
+    void setPriority(int priority);
+
+    /**
+     * Sets hello interval.
+     *
+     * @param helloInterval hello interval
+     */
+    void setHelloInterval(int helloInterval);
+}
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