| /* |
| * Copyright 2014-present 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.net.intent.constraint; |
| |
| import com.google.common.annotations.Beta; |
| import com.google.common.base.MoreObjects; |
| import com.google.common.collect.ImmutableSet; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.intent.ResourceContext; |
| |
| import java.util.Collections; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| /** |
| * Constraint that evaluates elements not passed through. |
| */ |
| @Beta |
| public class ObstacleConstraint extends BooleanConstraint { |
| |
| private final Set<DeviceId> obstacles; |
| |
| /** |
| * Creates a new constraint that the specified device are not passed through. |
| * @param obstacles devices not to be passed |
| */ |
| public ObstacleConstraint(DeviceId... obstacles) { |
| this.obstacles = ImmutableSet.copyOf(obstacles); |
| } |
| |
| // Constructor for serialization |
| private ObstacleConstraint() { |
| this.obstacles = Collections.emptySet(); |
| } |
| |
| /** |
| * Returns the obstacle device ids. |
| * |
| * @return Set of obstacle device ids |
| */ |
| public Set<DeviceId> obstacles() { |
| return obstacles; |
| } |
| |
| // doesn't use LinkResourceService |
| @Override |
| public boolean isValid(Link link, ResourceContext context) { |
| // explicitly call a method not depending on LinkResourceService |
| return isValid(link); |
| } |
| |
| private boolean isValid(Link link) { |
| if (link.type() != Link.Type.EDGE) { |
| DeviceId src = link.src().deviceId(); |
| DeviceId dst = link.dst().deviceId(); |
| |
| return !(obstacles.contains(src) || obstacles.contains(dst)); |
| |
| } else { |
| |
| boolean isSrc = true; |
| if (link.src().elementId() instanceof DeviceId) { |
| |
| DeviceId src = link.src().deviceId(); |
| isSrc = !(obstacles.contains(src)); |
| } |
| |
| boolean isDst = true; |
| if (link.dst().elementId() instanceof DeviceId) { |
| DeviceId dst = link.dst().deviceId(); |
| isDst = !(obstacles.contains(dst)); |
| } |
| |
| return isSrc || isDst; |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return obstacles.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| |
| if (!(obj instanceof ObstacleConstraint)) { |
| return false; |
| } |
| |
| final ObstacleConstraint that = (ObstacleConstraint) obj; |
| return Objects.equals(this.obstacles, that.obstacles); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(this) |
| .add("obstacles", obstacles) |
| .toString(); |
| } |
| } |