| /* |
| * Copyright 2014 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 org.onosproject.net.Link; |
| import org.onosproject.net.resource.BandwidthResource; |
| import org.onosproject.net.resource.BandwidthResourceRequest; |
| import org.onosproject.net.resource.LinkResourceService; |
| import org.onosproject.net.resource.ResourceRequest; |
| import org.onosproject.net.resource.ResourceType; |
| |
| import java.util.Objects; |
| |
| import static com.google.common.base.MoreObjects.toStringHelper; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Constraint that evaluates links based on available bandwidths. |
| */ |
| public class BandwidthConstraint extends BooleanConstraint { |
| |
| private final BandwidthResource bandwidth; |
| |
| /** |
| * Creates a new bandwidth constraint. |
| * |
| * @param bandwidth required bandwidth |
| */ |
| public BandwidthConstraint(BandwidthResource bandwidth) { |
| this.bandwidth = checkNotNull(bandwidth, "Bandwidth cannot be null"); |
| } |
| |
| // Constructor for serialization |
| private BandwidthConstraint() { |
| this.bandwidth = null; |
| } |
| |
| @Override |
| public boolean isValid(Link link, LinkResourceService resourceService) { |
| for (ResourceRequest request : resourceService.getAvailableResources(link)) { |
| if (request.type() == ResourceType.BANDWIDTH) { |
| BandwidthResourceRequest brr = (BandwidthResourceRequest) request; |
| if (brr.bandwidth().toDouble() >= bandwidth.toDouble()) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns the bandwidth required by this constraint. |
| * |
| * @return required bandwidth |
| */ |
| public BandwidthResource bandwidth() { |
| return bandwidth; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(bandwidth); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| final BandwidthConstraint other = (BandwidthConstraint) obj; |
| return Objects.equals(this.bandwidth, other.bandwidth); |
| } |
| |
| @Override |
| public String toString() { |
| return toStringHelper(this).add("bandwidth", bandwidth).toString(); |
| } |
| } |