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/*
* 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.collect.ImmutableSet;
import org.onosproject.net.Link;
import org.onosproject.net.resource.link.LinkResourceService;
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;
}
@Override
public boolean isValid(Link link, LinkResourceService resourceService) {
boolean contains = types.contains(link.type());
return isInclusive ? contains : !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();
}
}
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