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.image;
  
  import org.apache.kafka.server.common.MetadataVersion;
  
  import java.util.Objects;
  
  
  /**
   * A change in the MetadataVersion.
   */
  public final class MetadataVersionChange {
      private final MetadataVersion oldVersion;
      private final MetadataVersion newVersion;
  
      public MetadataVersionChange(
              MetadataVersion oldVersion,
              MetadataVersion newVersion
      ) {
          this.oldVersion = Objects.requireNonNull(oldVersion);
          this.newVersion = Objects.requireNonNull(newVersion);
      }
  
      public MetadataVersion oldVersion() {
          return oldVersion;
      }
  
      public MetadataVersion newVersion() {
          return newVersion;
      }
  
      public boolean isUpgrade() {
          return oldVersion.isLessThan(newVersion);
      }
  
      public boolean isDowngrade() {
          return newVersion.isLessThan(oldVersion);
      }
  
      @Override
      public boolean equals(Object o) {
          if (o == null || !o.getClass().equals(this.getClass())) return false;
          MetadataVersionChange other = (MetadataVersionChange) o;
          return oldVersion.equals(other.oldVersion) &&
                  newVersion.equals(other.newVersion);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(oldVersion,
                  newVersion);
      }
  
      @Override
      public String toString() {
          return "MetadataVersionChange(" +
                  "oldVersion=" + oldVersion +
                  ", newVersion=" + newVersion +
                  ")";
      }
  }
  