| /* |
| * 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. |
| * <p> |
| * Classes implementing this interface must also implement |
| * {@link #hashCode()} and {@link #equals(Object)}. |
| */ |
| public interface Timestamp extends Comparable<Timestamp> { |
| |
| @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; |
| } |
| } |