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/*
* 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);
}
}
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