[Emu] Open Flow Optical Port Description
Change-Id: I8da4d7a1e1dea18d56cba9673f70b1ec69a5adcf
diff --git a/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceValueMapper.java b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceValueMapper.java
new file mode 100644
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--- /dev/null
+++ b/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);
+ }
+
+}