Ray Milkey | b9a8a18 | 2015-01-20 14:15:35 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.codec.impl; |
| 17 | |
| 18 | import org.onosproject.codec.CodecContext; |
| 19 | import org.onosproject.codec.JsonCodec; |
| 20 | import org.onosproject.net.DeviceId; |
| 21 | import org.onosproject.net.Link; |
| 22 | import org.onosproject.net.intent.Constraint; |
| 23 | import org.onosproject.net.intent.constraint.AnnotationConstraint; |
| 24 | import org.onosproject.net.intent.constraint.BandwidthConstraint; |
| 25 | import org.onosproject.net.intent.constraint.LambdaConstraint; |
| 26 | import org.onosproject.net.intent.constraint.LatencyConstraint; |
| 27 | import org.onosproject.net.intent.constraint.LinkTypeConstraint; |
| 28 | import org.onosproject.net.intent.constraint.ObstacleConstraint; |
| 29 | import org.onosproject.net.intent.constraint.WaypointConstraint; |
| 30 | |
| 31 | import com.fasterxml.jackson.databind.node.ArrayNode; |
| 32 | import com.fasterxml.jackson.databind.node.ObjectNode; |
| 33 | |
| 34 | import static com.google.common.base.Preconditions.checkNotNull; |
| 35 | |
| 36 | /** |
| 37 | * Constraint JSON codec. |
| 38 | */ |
Ray Milkey | 540b2ce | 2015-02-04 17:50:20 -0800 | [diff] [blame] | 39 | public final class ConstraintCodec extends JsonCodec<Constraint> { |
Ray Milkey | b9a8a18 | 2015-01-20 14:15:35 -0800 | [diff] [blame] | 40 | |
| 41 | /** |
| 42 | * Encodes a latency constraint. |
| 43 | * |
| 44 | * @param constraint latency constraint to encode |
| 45 | * @param context code context |
| 46 | * @return JSON ObjectNode representing the constraint |
| 47 | */ |
| 48 | private ObjectNode encodeLatencyConstraint(Constraint constraint, |
| 49 | CodecContext context) { |
| 50 | checkNotNull(constraint, "Duration constraint cannot be null"); |
| 51 | final LatencyConstraint latencyConstraint = |
| 52 | (LatencyConstraint) constraint; |
| 53 | return context.mapper().createObjectNode() |
| 54 | .put("latencyMillis", latencyConstraint.latency().toMillis()); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Encodes an obstacle constraint. |
| 59 | * |
| 60 | * @param constraint obstacle constraint to encode |
| 61 | * @param context code context |
| 62 | * @return JSON ObjectNode representing the constraint |
| 63 | */ |
| 64 | private ObjectNode encodeObstacleConstraint(Constraint constraint, |
| 65 | CodecContext context) { |
| 66 | checkNotNull(constraint, "Obstacle constraint cannot be null"); |
| 67 | final ObstacleConstraint obstacleConstraint = |
| 68 | (ObstacleConstraint) constraint; |
| 69 | |
| 70 | final ObjectNode result = context.mapper().createObjectNode(); |
| 71 | final ArrayNode jsonObstacles = result.putArray("obstacles"); |
| 72 | |
| 73 | for (DeviceId did : obstacleConstraint.obstacles()) { |
| 74 | jsonObstacles.add(did.toString()); |
| 75 | } |
| 76 | |
| 77 | return result; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Encodes a waypoint constraint. |
| 82 | * |
| 83 | * @param constraint waypoint constraint to encode |
| 84 | * @param context code context |
| 85 | * @return JSON ObjectNode representing the constraint |
| 86 | */ |
| 87 | private ObjectNode encodeWaypointConstraint(Constraint constraint, |
| 88 | CodecContext context) { |
| 89 | checkNotNull(constraint, "Waypoint constraint cannot be null"); |
| 90 | final WaypointConstraint waypointConstraint = |
| 91 | (WaypointConstraint) constraint; |
| 92 | |
| 93 | final ObjectNode result = context.mapper().createObjectNode(); |
| 94 | final ArrayNode jsonWaypoints = result.putArray("waypoints"); |
| 95 | |
| 96 | for (DeviceId did : waypointConstraint.waypoints()) { |
| 97 | jsonWaypoints.add(did.toString()); |
| 98 | } |
| 99 | |
| 100 | return result; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Encodes a annotation constraint. |
| 105 | * |
| 106 | * @param constraint annotation constraint to encode |
| 107 | * @param context code context |
| 108 | * @return JSON ObjectNode representing the constraint |
| 109 | */ |
| 110 | private ObjectNode encodeAnnotationConstraint(Constraint constraint, |
| 111 | CodecContext context) { |
| 112 | checkNotNull(constraint, "Annotation constraint cannot be null"); |
| 113 | final AnnotationConstraint annotationConstraint = |
| 114 | (AnnotationConstraint) constraint; |
| 115 | return context.mapper().createObjectNode() |
| 116 | .put("key", annotationConstraint.key()) |
| 117 | .put("threshold", annotationConstraint.threshold()); |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Encodes a bandwidth constraint. |
| 122 | * |
| 123 | * @param constraint bandwidth constraint to encode |
| 124 | * @param context code context |
| 125 | * @return JSON ObjectNode representing the constraint |
| 126 | */ |
| 127 | private ObjectNode encodeBandwidthConstraint(Constraint constraint, |
| 128 | CodecContext context) { |
| 129 | checkNotNull(constraint, "Bandwidth constraint cannot be null"); |
| 130 | final BandwidthConstraint bandwidthConstraint = |
| 131 | (BandwidthConstraint) constraint; |
| 132 | return context.mapper().createObjectNode() |
| 133 | .put("bandwidth", bandwidthConstraint.bandwidth().toDouble()); |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Encodes a lambda constraint. |
| 138 | * |
| 139 | * @param constraint lambda constraint to encode |
| 140 | * @param context code context |
| 141 | * @return JSON ObjectNode representing the constraint |
| 142 | */ |
| 143 | private ObjectNode encodeLambdaConstraint(Constraint constraint, |
| 144 | CodecContext context) { |
| 145 | checkNotNull(constraint, "Lambda constraint cannot be null"); |
| 146 | final LambdaConstraint lambdaConstraint = |
| 147 | (LambdaConstraint) constraint; |
| 148 | |
| 149 | return context.mapper().createObjectNode() |
| 150 | .put("lambda", lambdaConstraint.lambda().toInt()); |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Encodes a link type constraint. |
| 155 | * |
| 156 | * @param constraint link type constraint to encode |
| 157 | * @param context code context |
| 158 | * @return JSON ObjectNode representing the constraint |
| 159 | */ |
| 160 | private ObjectNode encodeLinkTypeConstraint(Constraint constraint, |
| 161 | CodecContext context) { |
| 162 | checkNotNull(constraint, "Link type constraint cannot be null"); |
| 163 | |
| 164 | final LinkTypeConstraint linkTypeConstraint = |
| 165 | (LinkTypeConstraint) constraint; |
| 166 | |
| 167 | final ObjectNode result = context.mapper().createObjectNode() |
| 168 | .put("inclusive", linkTypeConstraint.isInclusive()); |
| 169 | |
| 170 | final ArrayNode jsonTypes = result.putArray("types"); |
| 171 | |
| 172 | if (linkTypeConstraint.types() != null) { |
| 173 | for (Link.Type type : linkTypeConstraint.types()) { |
| 174 | jsonTypes.add(type.name()); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | return result; |
| 179 | } |
| 180 | |
| 181 | @Override |
| 182 | public ObjectNode encode(Constraint constraint, CodecContext context) { |
| 183 | checkNotNull(constraint, "Constraint cannot be null"); |
| 184 | |
| 185 | final ObjectNode result; |
| 186 | if (constraint instanceof BandwidthConstraint) { |
| 187 | result = encodeBandwidthConstraint(constraint, context); |
| 188 | } else if (constraint instanceof LambdaConstraint) { |
| 189 | result = encodeLambdaConstraint(constraint, context); |
| 190 | } else if (constraint instanceof LinkTypeConstraint) { |
| 191 | result = encodeLinkTypeConstraint(constraint, context); |
| 192 | } else if (constraint instanceof AnnotationConstraint) { |
| 193 | result = encodeAnnotationConstraint(constraint, context); |
| 194 | } else if (constraint instanceof LatencyConstraint) { |
| 195 | result = encodeLatencyConstraint(constraint, context); |
| 196 | } else if (constraint instanceof ObstacleConstraint) { |
| 197 | result = encodeObstacleConstraint(constraint, context); |
| 198 | } else if (constraint instanceof WaypointConstraint) { |
| 199 | result = encodeWaypointConstraint(constraint, context); |
| 200 | } else { |
| 201 | result = context.mapper().createObjectNode(); |
| 202 | } |
| 203 | |
| 204 | result.put("type", constraint.getClass().getSimpleName()); |
| 205 | return result; |
| 206 | } |
| 207 | } |