org.onosproject.store.Timestamp Maven / Gradle / Ivy
/*
* Copyright 2014-2015 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.store;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Opaque version structure.
*
* Classes implementing this interface must also implement
* {@link #hashCode()} and {@link #equals(Object)}.
*/
public interface Timestamp extends Comparable {
@Override
int hashCode();
@Override
boolean equals(Object obj);
/**
* Tests if this timestamp is newer than the specified timestamp.
*
* @param other timestamp to compare against
* @return true if this instance is newer
*/
default boolean isNewerThan(Timestamp other) {
return this.compareTo(checkNotNull(other)) > 0;
}
/**
* Tests if this timestamp is older than the specified timestamp.
*
* @param other timestamp to compare against
* @return true if this instance is older
*/
default boolean isOlderThan(Timestamp other) {
return this.compareTo(checkNotNull(other)) < 0;
}
}