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.metadata;
  
  import java.util.Collections;
  import java.util.Map;
  import java.util.Objects;
  import java.util.Optional;
  import java.util.Set;
  
  
  /**
   * A map of feature names to their supported versions.
   */
  public class FinalizedControllerFeatures {
      private final Map<String, Short> featureMap;
      private final long epoch;
  
      public FinalizedControllerFeatures(Map<String, Short> featureMap, long epoch) {
          this.featureMap = Collections.unmodifiableMap(featureMap);
          this.epoch = epoch;
      }
  
      public Optional<Short> get(String name) {
          return Optional.ofNullable(featureMap.get(name));
      }
  
      public short versionOrDefault(String name, short defaultValue) {
          return featureMap.getOrDefault(name, defaultValue);
      }
  
      public Set<String> featureNames() {
          return featureMap.keySet();
      }
  
      public Map<String, Short> featureMap() {
          return featureMap;
      }
  
      public long epoch() {
          return epoch;
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(featureMap, epoch);
      }
  
      @Override
      public boolean equals(Object o) {
          if (!(o instanceof FinalizedControllerFeatures other)) return false;
          return featureMap.equals(other.featureMap) && epoch == other.epoch;
      }
  
      @Override
      public String toString() {
          return "FinalizedControllerFeatures(" +
                  "featureMap=" + featureMap.toString() +
                  ", epoch=" + epoch +
                  ")";
      }
  }
  