| /* |
| * 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 com.google.common.annotations.Beta; |
| import com.google.common.base.MoreObjects; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.intent.ResourceContext; |
| |
| import java.util.Objects; |
| |
| import static org.onosproject.net.AnnotationKeys.getAnnotatedValue; |
| |
| /** |
| * Constraint that evaluates an arbitrary link annotated value is under the specified threshold. |
| */ |
| @Beta |
| public class AnnotationConstraint extends BooleanConstraint { |
| |
| private final String key; |
| private final double threshold; |
| |
| /** |
| * Creates a new constraint to keep the value for the specified key |
| * of link annotation under the threshold. |
| * |
| * @param key key of link annotation |
| * @param threshold threshold value of the specified link annotation |
| */ |
| public AnnotationConstraint(String key, double threshold) { |
| this.key = key; |
| this.threshold = threshold; |
| } |
| |
| // Constructor for serialization |
| private AnnotationConstraint() { |
| this.key = ""; |
| this.threshold = 0; |
| } |
| |
| /** |
| * Returns the key of link annotation this constraint designates. |
| * @return key of link annotation |
| */ |
| public String key() { |
| return key; |
| } |
| |
| /** |
| * Returns the threshold this constraint ensures as link annotated value. |
| * |
| * @return threshold as link annotated value |
| */ |
| public double threshold() { |
| return threshold; |
| } |
| |
| // 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) { |
| double value = getAnnotatedValue(link, key); |
| |
| return value <= threshold; |
| } |
| |
| // doesn't use LinkResourceService |
| @Override |
| public double cost(Link link, ResourceContext context) { |
| // explicitly call a method not depending on LinkResourceService |
| return cost(link); |
| } |
| |
| private double cost(Link link) { |
| if (isValid(link)) { |
| return getAnnotatedValue(link, key); |
| } else { |
| return -1; |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(key, threshold); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| |
| if (!(obj instanceof AnnotationConstraint)) { |
| return false; |
| } |
| |
| final AnnotationConstraint other = (AnnotationConstraint) obj; |
| return Objects.equals(this.key, other.key) && Objects.equals(this.threshold, other.threshold); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(this) |
| .add("key", key) |
| .add("threshold", threshold) |
| .toString(); |
| } |
| } |