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.server.common;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Objects;
  
  public record FinalizedFeatures(
      MetadataVersion metadataVersion,
      Map<String, Short> finalizedFeatures,
      long finalizedFeaturesEpoch
  ) {
      public static FinalizedFeatures fromKRaftVersion(MetadataVersion version) {
          return new FinalizedFeatures(version, Map.of(), -1);
      }
  
      public FinalizedFeatures(
          MetadataVersion metadataVersion,
          Map<String, Short> finalizedFeatures,
          long finalizedFeaturesEpoch
      ) {
          this.metadataVersion = Objects.requireNonNull(metadataVersion);
          this.finalizedFeatures = new HashMap<>(finalizedFeatures);
          this.finalizedFeaturesEpoch = finalizedFeaturesEpoch;
          this.finalizedFeatures.put(MetadataVersion.FEATURE_NAME, metadataVersion.featureLevel());
      }
  
      public FinalizedFeatures setFinalizedLevel(String key, short level) {
          if (level == (short) 0) {
              if (finalizedFeatures.containsKey(key)) {
                  Map<String, Short> newFinalizedFeatures = new HashMap<>(finalizedFeatures);
                  newFinalizedFeatures.remove(key);
                  return new FinalizedFeatures(
                      metadataVersion,
                      newFinalizedFeatures,
                      finalizedFeaturesEpoch);
              } else {
                  return this;
              }
          } else {
              Map<String, Short> newFinalizedFeatures = new HashMap<>(finalizedFeatures);
              newFinalizedFeatures.put(key, level);
              return new FinalizedFeatures(
                  metadataVersion,
                  newFinalizedFeatures,
                  finalizedFeaturesEpoch);
          }
      }
  }
  