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.clients.admin.internals.CoordinatorKey;
  import org.apache.kafka.common.KafkaFuture;
  
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.ExecutionException;
  
  public class DescribeTransactionsResult {
      private final Map<CoordinatorKey, KafkaFuture<TransactionDescription>> futures;
  
      DescribeTransactionsResult(Map<CoordinatorKey, KafkaFuture<TransactionDescription>> futures) {
          this.futures = futures;
      }
  
      /**
       * Get the description of a specific transactional ID.
       *
       * @param transactionalId the transactional ID to describe
       * @return a future which completes when the transaction description of a particular
       *         transactional ID is available.
       * @throws IllegalArgumentException if the `transactionalId` was not included in the
       *         respective call to {@link Admin#describeTransactions(Collection, DescribeTransactionsOptions)}.
       */
      public KafkaFuture<TransactionDescription> description(String transactionalId) {
          CoordinatorKey key = CoordinatorKey.byTransactionalId(transactionalId);
          KafkaFuture<TransactionDescription> future = futures.get(key);
          if (future == null) {
              throw new IllegalArgumentException("TransactionalId " +
                  "`" + transactionalId + "` was not included in the request");
          }
          return future;
      }
      /**
       * Get a future which returns a map of the transaction descriptions requested in the respective
       * call to {@link Admin#describeTransactions(Collection, DescribeTransactionsOptions)}.
       *
       * If the description fails on any of the transactional IDs in the request, then this future
       * will also fail.
       *
       * @return a future which either completes when all transaction descriptions complete or fails
       *         if any of the descriptions cannot be obtained
       */
      public KafkaFuture<Map<String, TransactionDescription>> all() {
          return KafkaFuture.allOf(futures.values().toArray(new KafkaFuture<?>[0]))
              .thenApply(nil -> {
                  Map<String, TransactionDescription> results = new HashMap<>(futures.size());
                  for (Map.Entry<CoordinatorKey, KafkaFuture<TransactionDescription>> entry : futures.entrySet()) {
                      try {
                          results.put(entry.getKey().idValue, entry.getValue().get());
                      } catch (InterruptedException | ExecutionException e) {
                          // This should be unreachable, because allOf ensured that all the futures completed successfully.
                          throw new RuntimeException(e);
                      }
                  }
                  return results;
              });
      }
  
  }
  