1 files changed, 45 insertions, 0 deletions
diff --git a/framework/src/onos/core/api/src/main/java/org/onosproject/net/Lambda.java b/framework/src/onos/core/api/src/main/java/org/onosproject/net/Lambda.java
new file mode 100644
index 00000000..47d0d5f0
--- /dev/null
+++ b/framework/src/onos/core/api/src/main/java/org/onosproject/net/Lambda.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2015 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.net;
+
+/**
+ * Abstraction of wavelength. Currently, this is just a marker interface
+ */
+public interface Lambda {
+    /**
+     * Create an Lambda instance with the specified wavelength index number.
+     *
+     * @param lambda index number
+     * @return an instance
+     */
+    static Lambda indexedLambda(long lambda) {
+        return new IndexedLambda(lambda);
+    }
+
+    /**
+     * Creates a Lambda instance with the specified arguments.
+     *
+     * @param gridType          grid type
+     * @param channelSpacing    channel spacing
+     * @param spacingMultiplier channel spacing multiplier
+     * @param slotGranularity   slot width granularity
+     * @return new lambda with specified arguments
+     */
+    static Lambda ochSignal(GridType gridType, ChannelSpacing channelSpacing,
+                            int spacingMultiplier, int slotGranularity) {
+        return new OchSignal(gridType, channelSpacing, spacingMultiplier, slotGranularity);
+    }
+}