| /* |
| * Copyright 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.ecmap; |
| |
| import java.util.Objects; |
| |
| import org.onosproject.store.Timestamp; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Base class for events in an EventuallyConsistentMap. |
| */ |
| public abstract class AbstractEntry<K, V> implements Comparable<AbstractEntry<K, V>> { |
| private final K key; |
| private final Timestamp timestamp; |
| |
| /** |
| * Creates a new put entry. |
| * |
| * @param key key of the entry |
| * @param timestamp timestamp of the put event |
| */ |
| public AbstractEntry(K key, Timestamp timestamp) { |
| this.key = checkNotNull(key); |
| this.timestamp = checkNotNull(timestamp); |
| } |
| |
| // Needed for serialization. |
| @SuppressWarnings("unused") |
| protected AbstractEntry() { |
| this.key = null; |
| this.timestamp = null; |
| } |
| |
| /** |
| * Returns the key of the entry. |
| * |
| * @return the key |
| */ |
| public K key() { |
| return key; |
| } |
| |
| /** |
| * Returns the timestamp of the event. |
| * |
| * @return the timestamp |
| */ |
| public Timestamp timestamp() { |
| return timestamp; |
| } |
| |
| @Override |
| public int compareTo(AbstractEntry<K, V> o) { |
| return this.timestamp.compareTo(o.timestamp); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(timestamp); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o instanceof AbstractEntry) { |
| final AbstractEntry that = (AbstractEntry) o; |
| return this.timestamp.equals(that.timestamp); |
| } |
| return false; |
| } |
| } |