ONOS-5549 TE Tunnel attributes management API

Change-Id: I22f85009f1620cb972fec4a1d0e4bbc357c042e7
diff --git a/apps/tetunnel/api/src/main/java/org/onosproject/tetunnel/api/tunnel/path/TeRouteUnnumberedLink.java b/apps/tetunnel/api/src/main/java/org/onosproject/tetunnel/api/tunnel/path/TeRouteUnnumberedLink.java
new file mode 100755
index 0000000..1ea1a1c
--- /dev/null
+++ b/apps/tetunnel/api/src/main/java/org/onosproject/tetunnel/api/tunnel/path/TeRouteUnnumberedLink.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2016-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.tetunnel.api.tunnel.path;
+
+import org.onosproject.tetopology.management.api.node.TeNodeKey;
+import org.onosproject.tetopology.management.api.node.TtpKey;
+
+/**
+ * Representation of a UnnumberedLink as a TE LSP route element.
+ */
+public interface TeRouteUnnumberedLink extends TeRouteSubobject {
+
+    /**
+     * Returns node of this route subobject.
+     *
+     * @return TE node key
+     */
+    TeNodeKey node();
+
+    /**
+     * Returns termination point of this route subobject.
+     *
+     * @return TE termination point key
+     */
+    TtpKey ttp();
+}