| /* |
| * 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.collect.ImmutableSet; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.intent.ResourceContext; |
| |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import static com.google.common.base.MoreObjects.toStringHelper; |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Constraint that evaluates links based on their type. |
| */ |
| @Beta |
| public class LinkTypeConstraint extends BooleanConstraint { |
| |
| private final Set<Link.Type> types; |
| private final boolean isInclusive; |
| |
| /** |
| * Creates a new constraint for requesting connectivity using or avoiding |
| * the specified link types. |
| * |
| * @param inclusive indicates whether the given link types are to be |
| * permitted or avoided |
| * @param types link types |
| */ |
| public LinkTypeConstraint(boolean inclusive, Link.Type... types) { |
| checkNotNull(types, "Link types cannot be null"); |
| checkArgument(types.length > 0, "There must be more than one type"); |
| this.types = ImmutableSet.copyOf(types); |
| this.isInclusive = inclusive; |
| } |
| |
| // Constructor for serialization |
| private LinkTypeConstraint() { |
| this.types = null; |
| this.isInclusive = false; |
| } |
| |
| // 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) { |
| boolean contains = types.contains(link.type()); |
| return isInclusive == contains; |
| } |
| |
| /** |
| * Returns the set of link types. |
| * |
| * @return set of link types |
| */ |
| public Set<Link.Type> types() { |
| return types; |
| } |
| |
| /** |
| * Indicates if the constraint is inclusive or exclusive. |
| * |
| * @return true if inclusive |
| */ |
| public boolean isInclusive() { |
| return isInclusive; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(types, isInclusive); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| final LinkTypeConstraint other = (LinkTypeConstraint) obj; |
| return Objects.equals(this.types, other.types) && Objects.equals(this.isInclusive, other.isInclusive); |
| } |
| |
| @Override |
| public String toString() { |
| return toStringHelper(this) |
| .add("inclusive", isInclusive) |
| .add("types", types) |
| .toString(); |
| } |
| } |