Java tutorial
/* * 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 eu.netide.core.globalfib.flow; import com.google.common.collect.BiMap; import com.google.common.collect.EnumHashBiMap; import org.onosproject.net.ChannelSpacing; import org.onosproject.net.GridType; import org.onosproject.net.OchSignalType; import org.onosproject.net.OduSignalType; /** * Collection of helper methods to convert protocol agnostic models to values used in OpenFlow spec. */ final class OpenFlowValueMapper { // prohibit instantiation private OpenFlowValueMapper() { } private static final BiMap<GridType, Byte> GRID_TYPES = EnumHashBiMap.create(GridType.class); static { // See ONF "Optical Transport Protocol Extensions Version 1.0" for the following values GRID_TYPES.put(GridType.DWDM, (byte) 1); // OFPGRIDT_DWDM of enum ofp_grid_type GRID_TYPES.put(GridType.CWDM, (byte) 2); // OFPGRIDT_CWDM of enum ofp_grid_type GRID_TYPES.put(GridType.FLEX, (byte) 3); // OFPGRIDT_FLEX of enum ofp_grid_type } private static final BiMap<ChannelSpacing, Byte> CHANNEL_SPACING = EnumHashBiMap.create(ChannelSpacing.class); static { // See ONF "Optical Transport Protocol Extensions Version 1.0" for the following values CHANNEL_SPACING.put(ChannelSpacing.CHL_100GHZ, (byte) 1); // OFPCS_100GHZ of enum ofp_chl_spacing CHANNEL_SPACING.put(ChannelSpacing.CHL_50GHZ, (byte) 2); // OFPCS_50GHZ of enum ofp_chl_spacing CHANNEL_SPACING.put(ChannelSpacing.CHL_25GHZ, (byte) 3); // OFPCS_25GHZ of enum ofp_chl_spacing CHANNEL_SPACING.put(ChannelSpacing.CHL_12P5GHZ, (byte) 4); // OFPCS_12P5GHZ of enum ofp_chl_spacing CHANNEL_SPACING.put(ChannelSpacing.CHL_6P25GHZ, (byte) 5); // OFPCS_6P25GHZ of enum ofp_chl_spacing } private static final BiMap<OchSignalType, Byte> OCH_SIGNAL_TYPES = EnumHashBiMap.create(OchSignalType.class); static { // See ONF "Optical Transport Protocol Extensions Version 1.0" for the following values OCH_SIGNAL_TYPES.put(OchSignalType.FIXED_GRID, (byte) 1); // OFPOCHT_FIX_GRID of enum ofp_och_signal_type OCH_SIGNAL_TYPES.put(OchSignalType.FLEX_GRID, (byte) 2); // OFPOCHT_FLEX_GRID of enum ofp_och_signal_type } 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 * @throws NoMappingFoundException if no corresponding value is found */ private static <I, O> O lookup(BiMap<I, O> map, I input, Class<O> cls) { if (!map.containsKey(input)) { throw new NoMappingFoundException(input, cls); } return map.get(input); } /** * Looks up the corresponding byte value defined in * ONF "Optical Transport Protocol Extensions Version 1.0" * from the specified {@link GridType} instance. * * @param type grid type * @return the byte value corresponding to the specified grid type * @throws NoMappingFoundException if the specified grid type is not found */ static byte lookupGridType(GridType type) { return lookup(GRID_TYPES, type, Byte.class); } /** * Looks up the corresponding {@link GridType} instance * from the specified byte value for grid type * defined in ONF "Optical Transport Protocol Extensions Version 1.0". * * @param type byte value as grid type defined the spec * @return the corresponding GridType instance */ static GridType lookupGridType(byte type) { return lookup(GRID_TYPES.inverse(), type, GridType.class); } /** * Looks up the corresponding byte value for channel spacing defined in * ONF "Optical Transport Protocol Extensions Version 1.0" * from the specified {@link ChannelSpacing} instance. * * @param spacing channel spacing * @return byte value corresponding to the specified channel spacing * @throws NoMappingFoundException if the specified channel spacing is not found */ static byte lookupChannelSpacing(ChannelSpacing spacing) { return lookup(CHANNEL_SPACING, spacing, Byte.class); } /** * Looks up the corresponding {@link ChannelSpacing} instance * from the specified byte value for channel spacing * defined in ONF "Optical Transport Protocol Extensions Version 1.0". * * @param spacing byte value as channel spacing defined the spec * @return the corresponding ChannelSpacing instance * @throws NoMappingFoundException if the specified channel spacing is not found */ static ChannelSpacing lookupChannelSpacing(byte spacing) { return lookup(CHANNEL_SPACING.inverse(), spacing, ChannelSpacing.class); } /** * Looks up the corresponding byte value for Och signal type defined in * ONF "Optical Transport Protocol Extensions Version 1.0" * from the specified {@link OchSignalType} instance. * * @param signalType optical signal type * @return byte value corresponding to the specified OCh signal type * @throws NoMappingFoundException if the specified Och signal type is not found */ static byte lookupOchSignalType(OchSignalType signalType) { return lookup(OCH_SIGNAL_TYPES, signalType, Byte.class); } /** * Looks up the the corresponding {@link OchSignalType} instance * from the specified byte value for Och signal type defined in * ONF "Optical Transport Protocol Extensions Version 1.0". * * @param signalType byte value as Och singal type defined the spec * @return the corresponding OchSignalType instance * @throws NoMappingFoundException if the specified Och signal type is not found */ static OchSignalType lookupOchSignalType(byte signalType) { return lookup(OCH_SIGNAL_TYPES.inverse(), signalType, OchSignalType.class); } /** * Looks up the corresponding byte value for ODU signal type defined in * ONF "Optical Transport Protocol Extensions Version 1.0" * from the specified {@link OchSignalType} instance. * * @param signalType ODU (Optical channel Data Unit) signal type * @return byte value corresponding to the specified ODU signal type * @throws NoMappingFoundException if the specified ODU signal type is not found */ static byte lookupOduSignalType(OduSignalType signalType) { return lookup(ODU_SIGNAL_TYPES, signalType, Byte.class); } /** * Looks up the the corresponding {@link OchSignalType} 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 * @throws NoMappingFoundException if the specified ODU signal type is not found */ static OduSignalType lookupOduSignalType(byte signalType) { return lookup(ODU_SIGNAL_TYPES.inverse(), signalType, OduSignalType.class); } }