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.cassandra.sidecar.common.data;
  
  import org.apache.cassandra.sidecar.common.utils.Preconditions;
  import org.apache.cassandra.sidecar.common.utils.StringUtils;
  import org.jetbrains.annotations.Nullable;
  
  /**
   * Consistency config to group the related values, i.e. consistency level and local datacenter name.
   * Note that both fields are nullable
   */
  public class ConsistencyConfig
  {
      @Nullable
      public final ConsistencyLevel consistencyLevel;
      @Nullable
      public final String localDatacenter;
  
      /**
       * Create {@link ConsistencyConfig} from the string literals
       *
       * @param consistencyLevelString nullable string to resolve to {@link ConsistencyLevel}
       * @param localDatacenter nullable string; required to be not empty when the resolved consistency level is localDcOnly
       * @return {@link ConsistencyConfig} instance
       */
      public static ConsistencyConfig parseString(@Nullable String consistencyLevelString, @Nullable String localDatacenter)
      {
          return new ConsistencyConfig(ConsistencyLevel.fromString(consistencyLevelString), localDatacenter);
      }
  
      private ConsistencyConfig(@Nullable ConsistencyLevel consistencyLevel, @Nullable String localDatacenter)
      {
          Preconditions.checkArgument(consistencyLevel == null || !consistencyLevel.isLocalDcOnly || StringUtils.isNotEmpty(localDatacenter),
                                      "localDatacenter cannot be empty for consistency level: " + consistencyLevel);
  
          this.consistencyLevel = consistencyLevel;
          this.localDatacenter = localDatacenter;
      }
  }
  