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.HostResolver;
  import org.apache.kafka.clients.admin.CreateTopicsResult.TopicMetadataAndConfig;
  import org.apache.kafka.clients.admin.internals.CoordinatorKey;
  import org.apache.kafka.clients.consumer.OffsetAndMetadata;
  import org.apache.kafka.common.KafkaException;
  import org.apache.kafka.common.KafkaFuture;
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.common.config.ConfigResource;
  import org.apache.kafka.common.internals.KafkaFutureImpl;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Map;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  public class AdminClientTestUtils {
  
      /**
       * Helper to create a ListPartitionReassignmentsResult instance for a given Throwable.
       * ListPartitionReassignmentsResult's constructor is only accessible from within the
       * admin package.
       */
      public static ListPartitionReassignmentsResult listPartitionReassignmentsResult(Throwable t) {
          KafkaFutureImpl<Map<TopicPartition, PartitionReassignment>> future = new KafkaFutureImpl<>();
          future.completeExceptionally(t);
          return new ListPartitionReassignmentsResult(future);
      }
  
      /**
       * Helper to create a CreateTopicsResult instance for a given Throwable.
       * CreateTopicsResult's constructor is only accessible from within the
       * admin package.
       */
      public static CreateTopicsResult createTopicsResult(String topic, Throwable t) {
          KafkaFutureImpl<TopicMetadataAndConfig> future = new KafkaFutureImpl<>();
          future.completeExceptionally(t);
          return new CreateTopicsResult(Collections.singletonMap(topic, future));
      }
  
      /**
       * Helper to create a DeleteTopicsResult instance for a given Throwable.
       * DeleteTopicsResult's constructor is only accessible from within the
       * admin package.
       */
      public static DeleteTopicsResult deleteTopicsResult(String topic, Throwable t) {
          KafkaFutureImpl<Void> future = new KafkaFutureImpl<>();
          future.completeExceptionally(t);
          return DeleteTopicsResult.ofTopicNames(Collections.singletonMap(topic, future));
      }
  
      /**
       * Helper to create a ListTopicsResult instance for a given topic.
       * ListTopicsResult's constructor is only accessible from within the
       * admin package.
       */
      public static ListTopicsResult listTopicsResult(String topic) {
          KafkaFutureImpl<Map<String, TopicListing>> future = new KafkaFutureImpl<>();
          future.complete(Collections.singletonMap(topic, new TopicListing(topic, Uuid.ZERO_UUID, false)));
          return new ListTopicsResult(future);
      }
  
      /**
       * Helper to create a AlterConfigsResult instance for a given Throwable.
       * AlterConfigsResult's constructor is only accessible from within the
       * admin package.
       */
      public static AlterConfigsResult alterConfigsResult(ConfigResource cr, Throwable t) {
          KafkaFutureImpl<Void> future = new KafkaFutureImpl<>();
          Map<ConfigResource, KafkaFuture<Void>> futures = Collections.singletonMap(cr, future);
          future.completeExceptionally(t);
          return new AlterConfigsResult(futures);
      }
  
      /**
       * Helper to create a AlterConfigsResult instance for a given ConfigResource.
       * AlterConfigsResult's constructor is only accessible from within the
       * admin package.
       */
      public static AlterConfigsResult alterConfigsResult(ConfigResource cr) {
          KafkaFutureImpl<Void> future = new KafkaFutureImpl<>();
          Map<ConfigResource, KafkaFuture<Void>> futures = Collections.singletonMap(cr, future);
          future.complete(null);
          return new AlterConfigsResult(futures);
      }
  
      /** Helper to create a DescribeConfigsResult instance for a given ConfigResource.
       * DescribeConfigsResult's constructor is only accessible from within the
       * admin package.
       */
      public static DescribeConfigsResult describeConfigsResult(ConfigResource cr, Config config) {
          KafkaFutureImpl<Config> future = new KafkaFutureImpl<>();
          future.complete(config);
          return new DescribeConfigsResult(Collections.singletonMap(cr, future));
      }
  
      /**
       * Helper to create a CreatePartitionsResult instance for a given Throwable.
       * CreatePartitionsResult's constructor is only accessible from within the
       * admin package.
       */
      public static CreatePartitionsResult createPartitionsResult(String topic, Throwable t) {
          KafkaFutureImpl<Void> future = new KafkaFutureImpl<>();
          future.completeExceptionally(t);
          return new CreatePartitionsResult(Collections.singletonMap(topic, future));
      }
  
      /**
       * Helper to create a DescribeTopicsResult instance for a given topic.
       * DescribeTopicsResult's constructor is only accessible from within the
       * admin package.
       */
      public static DescribeTopicsResult describeTopicsResult(String topic, TopicDescription description) {
          KafkaFutureImpl<TopicDescription> future = new KafkaFutureImpl<>();
          future.complete(description);
          return DescribeTopicsResult.ofTopicNames(Collections.singletonMap(topic, future));
      }
  
      public static DescribeTopicsResult describeTopicsResult(Map<String, TopicDescription> topicDescriptions) {
          return DescribeTopicsResult.ofTopicNames(topicDescriptions.entrySet().stream()
                  .collect(Collectors.toMap(Map.Entry::getKey, e -> KafkaFuture.completedFuture(e.getValue()))));
      }
  
      public static ListGroupsResult listGroupsResult(GroupListing... groups) {
          return new ListGroupsResult(
              KafkaFuture.completedFuture(Arrays.stream(groups)
                  .collect(Collectors.toList())));
      }
  
      public static ListGroupsResult listGroupsResult(KafkaException exception) {
          return new ListGroupsResult(KafkaFuture.completedFuture(Collections.singleton(exception)));
      }
  
      public static ListConsumerGroupOffsetsResult listConsumerGroupOffsetsResult(Map<String, Map<TopicPartition, OffsetAndMetadata>> offsets) {
          Map<CoordinatorKey, KafkaFuture<Map<TopicPartition, OffsetAndMetadata>>> resultMap = offsets.entrySet().stream()
              .collect(Collectors.toMap(e -> CoordinatorKey.byGroupId(e.getKey()),
                                        e -> KafkaFutureImpl.completedFuture(e.getValue())));
          return new ListConsumerGroupOffsetsResult(resultMap);
      }
  
      public static ListConsumerGroupOffsetsResult listConsumerGroupOffsetsResult(String group, KafkaException exception) {
          final KafkaFutureImpl<Map<TopicPartition, OffsetAndMetadata>> future = new KafkaFutureImpl<>();
          future.completeExceptionally(exception);
          return new ListConsumerGroupOffsetsResult(Collections.singletonMap(CoordinatorKey.byGroupId(group), future));
      }
  
      public static ListConfigResourcesResult listConfigResourcesResult(Map<ConfigResource.Type, Set<String>> resourceNames) {
          Collection<ConfigResource> resources = resourceNames.entrySet().stream()
              .flatMap(entry -> entry.getValue().stream()
                  .map(name -> new ConfigResource(entry.getKey(), name)))
              .collect(Collectors.toList());
          return new ListConfigResourcesResult(KafkaFuture.completedFuture(resources));
      }
  
      public static ListConfigResourcesResult listConfigResourcesResult(String... names) {
          return new ListConfigResourcesResult(
              KafkaFuture.completedFuture(Arrays.stream(names)
                  .map(name -> new ConfigResource(ConfigResource.Type.CLIENT_METRICS, name))
                  .collect(Collectors.toList())));
      }
  
      public static ListConfigResourcesResult listConfigResourcesResult(KafkaException exception) {
          final KafkaFutureImpl<Collection<ConfigResource>> future = new KafkaFutureImpl<>();
          future.completeExceptionally(exception);
          return new ListConfigResourcesResult(future);
      }
  
      public static ListShareGroupOffsetsResult createListShareGroupOffsetsResult(Map<String, KafkaFuture<Map<TopicPartition, OffsetAndMetadata>>> groupOffsets) {
          Map<CoordinatorKey, KafkaFuture<Map<TopicPartition, OffsetAndMetadata>>> coordinatorFutures = groupOffsets.entrySet().stream()
              .collect(Collectors.toMap(
                  entry -> CoordinatorKey.byGroupId(entry.getKey()),
                  Map.Entry::getValue
              ));
          return new ListShareGroupOffsetsResult(coordinatorFutures);
      }
  
      /**
       * Helper to create a KafkaAdminClient with a custom HostResolver accessible to tests outside this package.
       */
      public static Admin create(Map<String, Object> conf, HostResolver hostResolver) {
          return KafkaAdminClient.createInternal(new AdminClientConfig(conf, true), null, hostResolver);
      }
  }
  