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.clients.admin;
  
  import org.apache.kafka.common.KafkaFuture;
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.internals.KafkaFutureImpl;
  import org.apache.kafka.common.protocol.Errors;
  
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  
  /**
   * The result of the {@link AdminClient#alterConsumerGroupOffsets(String, Map)} call.
   */
  public class AlterConsumerGroupOffsetsResult {
  
      private final KafkaFuture<Map<TopicPartition, Errors>> future;
  
      AlterConsumerGroupOffsetsResult(KafkaFuture<Map<TopicPartition, Errors>> future) {
          this.future = future;
      }
  
      /**
       * Return a future which can be used to check the result for a given partition.
       */
      public KafkaFuture<Void> partitionResult(final TopicPartition partition) {
          final KafkaFutureImpl<Void> result = new KafkaFutureImpl<>();
  
          this.future.whenComplete((topicPartitions, throwable) -> {
              if (throwable != null) {
                  result.completeExceptionally(throwable);
              } else if (!topicPartitions.containsKey(partition)) {
                  result.completeExceptionally(new IllegalArgumentException(
                      "Alter offset for partition \"" + partition + "\" was not attempted"));
              } else {
                  final Errors error = topicPartitions.get(partition);
                  if (error == Errors.NONE) {
                      result.complete(null);
                  } else {
                      result.completeExceptionally(error.exception());
                  }
              }
          });
  
          return result;
      }
  
      /**
       * Return a future which succeeds if all the alter offsets succeed.
       */
      public KafkaFuture<Void> all() {
          return this.future.thenApply(topicPartitionErrorsMap ->  {
              List<TopicPartition> partitionsFailed = topicPartitionErrorsMap.entrySet()
                  .stream()
                  .filter(e -> e.getValue() != Errors.NONE)
                  .map(Map.Entry::getKey)
                  .collect(Collectors.toList());
              for (Errors error : topicPartitionErrorsMap.values()) {
                  if (error != Errors.NONE) {
                      throw error.exception(
                          "Failed altering group offsets for the following partitions: " + partitionsFailed);
                  }
              }
              return null;
          });
      }
  }
  