| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.hadoop.hdds.utils.db.cache; |
| |
| import java.util.Objects; |
| |
| /** |
| * CacheKey for the RocksDB table. |
| * @param <KEY> |
| */ |
| public class CacheKey<KEY> implements Comparable<KEY> { |
| |
| private final KEY key; |
| |
| public CacheKey(KEY key) { |
| Objects.requireNonNull(key, "Key Should not be null in CacheKey"); |
| this.key = key; |
| } |
| |
| public KEY getCacheKey() { |
| return key; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| CacheKey<?> cacheKey = (CacheKey<?>) o; |
| return Objects.equals(key, cacheKey.key); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(key); |
| } |
| |
| @Override |
| public int compareTo(Object o) { |
| if(Objects.equals(key, ((CacheKey<?>)o).key)) { |
| return 0; |
| } else { |
| return key.toString().compareTo((((CacheKey<?>) o).key).toString()); |
| } |
| } |
| } |