content: /*
   * 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.celeborn.service.deploy.worker.shuffledb;
  
  import java.nio.charset.StandardCharsets;
  
  /**
   * Used to identify the version of data stored in local shuffle state DB.
   *
   * <p>Note: code copied from Apache Spark.
   */
  public class StoreVersion {
  
    public static final byte[] KEY = "StoreVersion".getBytes(StandardCharsets.UTF_8);
  
    public final int major;
    public final int minor;
  
    public StoreVersion(int major, int minor) {
      this.major = major;
      this.minor = minor;
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (o == null || getClass() != o.getClass()) return false;
  
      StoreVersion that = (StoreVersion) o;
  
      return major == that.major && minor == that.minor;
    }
  
    @Override
    public int hashCode() {
      int result = major;
      result = 31 * result + minor;
      return result;
    }
  
    @Override
    public String toString() {
      return "StoreVersion[" + major + "." + minor + ']';
    }
  }
  