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.kafka.raft;
  
  import org.apache.kafka.server.common.OffsetAndEpoch;
  
  import java.util.Objects;
  
  public final class ValidOffsetAndEpoch {
      private final Kind kind;
      private final OffsetAndEpoch offsetAndEpoch;
  
      private ValidOffsetAndEpoch(Kind kind, OffsetAndEpoch offsetAndEpoch) {
          this.kind = kind;
          this.offsetAndEpoch = offsetAndEpoch;
      }
  
      public Kind kind() {
          return kind;
      }
  
      public OffsetAndEpoch offsetAndEpoch() {
          return offsetAndEpoch;
      }
  
      public enum Kind {
          DIVERGING, SNAPSHOT, VALID
      }
  
      public static ValidOffsetAndEpoch diverging(OffsetAndEpoch offsetAndEpoch) {
          return new ValidOffsetAndEpoch(Kind.DIVERGING, offsetAndEpoch);
      }
  
      public static ValidOffsetAndEpoch snapshot(OffsetAndEpoch offsetAndEpoch) {
          return new ValidOffsetAndEpoch(Kind.SNAPSHOT, offsetAndEpoch);
      }
  
      public static ValidOffsetAndEpoch valid(OffsetAndEpoch offsetAndEpoch) {
          return new ValidOffsetAndEpoch(Kind.VALID, offsetAndEpoch);
      }
  
      public static ValidOffsetAndEpoch valid() {
          return valid(new OffsetAndEpoch(-1, -1));
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj) return true;
          if (obj == null || getClass() != obj.getClass()) return false;
          ValidOffsetAndEpoch that = (ValidOffsetAndEpoch) obj;
          return kind == that.kind &&
                  offsetAndEpoch.equals(that.offsetAndEpoch);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(kind, offsetAndEpoch);
      }
  
      @Override
      public String toString() {
          return String.format(
              "ValidOffsetAndEpoch(kind=%s, offsetAndEpoch=%s)",
              kind,
              offsetAndEpoch
          );
      }
  }
  