com.hazelcast.jet.datamodel.TimestampedItem Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.jet.datamodel;
import java.util.Objects;
/**
* Mutable wrapper around an item that adds a timestamp. Useful for LRU
* caching.
*
* @param
*/
public class TimestampedItem {
private long timestamp;
private T item;
/**
* Creates a new timestamped item.
*/
public TimestampedItem(long timestamp, T item) {
this.timestamp = timestamp;
this.item = item;
}
/**
* Returns the timestamp.
*/
public long timestamp() {
return timestamp;
}
/**
* Returns the item.
*/
public T item() {
return item;
}
/**
* Sets the timestamp.
*
* @return {@code this}
*/
public TimestampedItem setTimestamp(long timestamp) {
this.timestamp = timestamp;
return this;
}
/**
* Sets the item.
*
* @return {@code this}
*/
public TimestampedItem setItem(T item) {
this.item = item;
return this;
}
@Override
@SuppressWarnings("unchecked")
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
TimestampedItem that = (TimestampedItem) obj;
return this.timestamp == that.timestamp
&& Objects.equals(this.item, that.item);
}
@Override
public int hashCode() {
int hc = 17;
hc = 37 * hc + Long.hashCode(timestamp);
hc = 37 * hc + Objects.hashCode(item);
return hc;
}
@Override
public String toString() {
return "TimestampedItem{ts=" + timestamp + ", item=" + item + '}';
}
}