1 files changed, 73 insertions, 0 deletions
diff --git a/framework/src/onos/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceValueMapper.java b/framework/src/onos/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceValueMapper.java
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+++ b/framework/src/onos/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceValueMapper.java
@@ -0,0 +1,73 @@
+/*
+ * 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.provider.of.device.impl;
+
+import org.onosproject.net.OduSignalType;
+
+import com.google.common.collect.BiMap;
+import com.google.common.collect.EnumHashBiMap;
+
+/**
+ * Collection of helper methods to convert protocol agnostic models to values used in OpenFlow spec.
+ */
+final class OpenFlowDeviceValueMapper {
+
+    // prohibit instantiation
+    private OpenFlowDeviceValueMapper() {}
+
+    private static final BiMap<OduSignalType, Byte> ODU_SIGNAL_TYPES = EnumHashBiMap.create(OduSignalType.class);
+    static {
+        // See ONF "Optical Transport Protocol Extensions Version 1.0" for the following values
+        ODU_SIGNAL_TYPES.put(OduSignalType.ODU1, (byte) 1);         // OFPODUT_ODU1 of enum ofp_odu_signal_type
+        ODU_SIGNAL_TYPES.put(OduSignalType.ODU2, (byte) 2);         // OFPODUT_ODU2 of enum ofp_odu_signal_type
+        ODU_SIGNAL_TYPES.put(OduSignalType.ODU3, (byte) 3);         // OFPODUT_ODU3 of enum ofp_odu_signal_type
+        ODU_SIGNAL_TYPES.put(OduSignalType.ODU4, (byte) 4);         // OFPODUT_ODU4 of enum ofp_odu_signal_type
+        ODU_SIGNAL_TYPES.put(OduSignalType.ODU0, (byte) 10);        // OFPODUT_ODU0 of enum ofp_odu_signal_type
+        ODU_SIGNAL_TYPES.put(OduSignalType.ODU2e, (byte) 11);       // OFPODUT_ODU2E of enum ofp_odu_signal_type
+    }
+
+    /**
+     * Looks up the specified input value to the corresponding value with the specified map.
+     *
+     * @param map bidirectional mapping
+     * @param input input value
+     * @param cls class of output value
+     * @param <I> type of input value
+     * @param <O> type of output value
+     * @return the corresponding value stored in the specified map
+     */
+    private static <I, O> O lookup(BiMap<I, O> map, I input, Class<O> cls) {
+        if (!map.containsKey(input)) {
+            throw new RuntimeException(
+                    String.format("No mapping found for %s when converting to %s", input, cls.getName()));
+        }
+
+        return map.get(input);
+    }
+
+    /**
+     * Looks up the the corresponding {@link OduSignalType} instance
+     * from the specified byte value for ODU signal type defined in
+     * ONF "Optical Transport Protocol Extensions Version 1.0".
+     *
+     * @param signalType byte value as ODU (Optical channel Data Unit) signal type defined the spec
+     * @return the corresponding OchSignalType instance
+     */
+    static OduSignalType lookupOduSignalType(byte signalType) {
+        return lookup(ODU_SIGNAL_TYPES.inverse(), signalType, OduSignalType.class);
+    }
+
+}