| /* |
| * 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.segmentrouting.grouphandler; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.HashSet; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import org.onosproject.net.DeviceId; |
| |
| /** |
| * Representation of a set of neighbor switch dpids along with edge node |
| * label. Meant to be used as a lookup-key in a hash-map to retrieve an |
| * ECMP-group that hashes packets to a set of ports connecting to the |
| * neighbors in this set. |
| */ |
| public class NeighborSet { |
| private final Set<DeviceId> neighbors; |
| private final int edgeLabel; |
| public static final int NO_EDGE_LABEL = -1; |
| |
| /** |
| * Constructor with set of neighbors. Edge label is |
| * default to -1. |
| * |
| * @param neighbors set of neighbors to be part of neighbor set |
| */ |
| public NeighborSet(Set<DeviceId> neighbors) { |
| checkNotNull(neighbors); |
| this.edgeLabel = NO_EDGE_LABEL; |
| this.neighbors = new HashSet<>(); |
| this.neighbors.addAll(neighbors); |
| } |
| |
| /** |
| * Constructor with set of neighbors and edge label. |
| * |
| * @param neighbors set of neighbors to be part of neighbor set |
| * @param edgeLabel label to be pushed as part of group operation |
| */ |
| public NeighborSet(Set<DeviceId> neighbors, int edgeLabel) { |
| checkNotNull(neighbors); |
| this.edgeLabel = edgeLabel; |
| this.neighbors = new HashSet<>(); |
| this.neighbors.addAll(neighbors); |
| } |
| |
| /** |
| * Default constructor for kryo serialization. |
| */ |
| public NeighborSet() { |
| this.edgeLabel = NO_EDGE_LABEL; |
| this.neighbors = new HashSet<>(); |
| } |
| |
| /** |
| * Gets the neighbors part of neighbor set. |
| * |
| * @return set of neighbor identifiers |
| */ |
| public Set<DeviceId> getDeviceIds() { |
| return neighbors; |
| } |
| |
| /** |
| * Gets the label associated with neighbor set. |
| * |
| * @return integer |
| */ |
| public int getEdgeLabel() { |
| return edgeLabel; |
| } |
| |
| // The list of neighbor ids and label are used for comparison. |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (!(o instanceof NeighborSet)) { |
| return false; |
| } |
| NeighborSet that = (NeighborSet) o; |
| return (this.neighbors.containsAll(that.neighbors) && |
| that.neighbors.containsAll(this.neighbors) && |
| (this.edgeLabel == that.edgeLabel)); |
| } |
| |
| // The list of neighbor ids and label are used for comparison. |
| @Override |
| public int hashCode() { |
| int result = 17; |
| int combinedHash = 0; |
| for (DeviceId d : neighbors) { |
| combinedHash = combinedHash + Objects.hash(d); |
| } |
| result = 31 * result + combinedHash + Objects.hash(edgeLabel); |
| |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return " Neighborset Sw: " + neighbors |
| + " and Label: " + edgeLabel; |
| } |
| } |