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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;
import static com.google.common.base.Preconditions.checkNotNull;
import java.util.Objects;
import com.google.common.base.MoreObjects;
// TODO Consider renaming.
// it's an identifier for a Link, but it's not ElementId, so not using LinkId.
/**
* Immutable representation of a link identity.
*/
public final class LinkKey {
private final ConnectPoint src;
private final ConnectPoint dst;
/**
* Returns source connection point.
*
* @return source connection point
*/
public ConnectPoint src() {
return src;
}
/**
* Returns destination connection point.
*
* @return destination connection point
*/
public ConnectPoint dst() {
return dst;
}
/**
* Creates a link identifier with source and destination connection point.
*
* @param src source connection point
* @param dst destination connection point
*/
private LinkKey(ConnectPoint src, ConnectPoint dst) {
this.src = checkNotNull(src);
this.dst = checkNotNull(dst);
}
/**
* Creates a link identifier with source and destination connection point.
*
* @param src source connection point
* @param dst destination connection point
* @return a link identifier
*/
public static LinkKey linkKey(ConnectPoint src, ConnectPoint dst) {
return new LinkKey(src, dst);
}
/**
* Creates a link identifier for the specified link.
*
* @param link link descriptor
* @return a link identifier
*/
public static LinkKey linkKey(Link link) {
return new LinkKey(link.src(), link.dst());
}
@Override
public int hashCode() {
return Objects.hash(src, dst);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof LinkKey) {
final LinkKey other = (LinkKey) obj;
return Objects.equals(this.src, other.src) &&
Objects.equals(this.dst, other.dst);
}
return false;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("src", src)
.add("dst", dst)
.toString();
}
}
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