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.coordinator.group;
  
  import java.util.Arrays;
  import java.util.Locale;
  import java.util.Map;
  import java.util.function.Function;
  import java.util.stream.Collectors;
  
  public enum ConsumerGroupMigrationPolicy {
      /** Both upgrade and downgrade are enabled.*/
      BIDIRECTIONAL("bidirectional", true, true),
  
      /** Only upgrade is enabled.*/
      UPGRADE("upgrade", true, false),
  
      /** Only downgrade is enabled.*/
      DOWNGRADE("downgrade", false, true),
  
      /** Neither upgrade nor downgrade is enabled.*/
      DISABLED("disabled", false, false);
  
      private final String name;
      private final boolean isUpgradeEnabled;
      private final boolean isDowngradeEnabled;
  
      ConsumerGroupMigrationPolicy(String config, boolean isUpgradeEnabled, boolean isDowngradeEnabled) {
          this.name = config;
          this.isUpgradeEnabled = isUpgradeEnabled;
          this.isDowngradeEnabled = isDowngradeEnabled;
      }
  
      public boolean isUpgradeEnabled() {
          return isUpgradeEnabled;
      }
  
      public boolean isDowngradeEnabled() {
          return isDowngradeEnabled;
      }
  
      @Override
      public String toString() {
          return name;
      }
  
      private static final Map<String, ConsumerGroupMigrationPolicy> NAME_TO_ENUM = Arrays.stream(values())
          .collect(Collectors.toMap(policy -> policy.name.toLowerCase(Locale.ROOT), Function.identity()));
  
      /**
       * Parse a string into the corresponding {@code GroupProtocolMigrationPolicy} enum value, in a case-insensitive manner.
       *
       * @return The {{@link ConsumerGroupMigrationPolicy}} according to the string passed. None is returned if
       * the string doesn't correspond to a valid policy.
       */
      public static ConsumerGroupMigrationPolicy parse(String name) {
          if (name == null) {
              return DISABLED;
          }
          ConsumerGroupMigrationPolicy policy = NAME_TO_ENUM.get(name.toLowerCase(Locale.ROOT));
  
          return policy == null ? DISABLED : policy;
      }
  }
  