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.common.requests;
  
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.message.FetchSnapshotResponseData;
  import org.apache.kafka.common.protocol.ApiKeys;
  import org.apache.kafka.common.protocol.Errors;
  import org.apache.kafka.common.protocol.Readable;
  
  import java.util.EnumMap;
  import java.util.Map;
  import java.util.Optional;
  
  public final class FetchSnapshotResponse extends AbstractResponse {
      private final FetchSnapshotResponseData data;
  
      public FetchSnapshotResponse(FetchSnapshotResponseData data) {
          super(ApiKeys.FETCH_SNAPSHOT);
          this.data = data;
      }
  
      @Override
      public Map<Errors, Integer> errorCounts() {
          Map<Errors, Integer> errors = new EnumMap<>(Errors.class);
  
          Errors topLevelError = Errors.forCode(data.errorCode());
          if (topLevelError != Errors.NONE) {
              errors.put(topLevelError, 1);
          }
  
          for (FetchSnapshotResponseData.TopicSnapshot topicResponse : data.topics()) {
              for (FetchSnapshotResponseData.PartitionSnapshot partitionResponse : topicResponse.partitions()) {
                  errors.compute(Errors.forCode(partitionResponse.errorCode()),
                      (error, count) -> count == null ? 1 : count + 1);
              }
          }
  
          return errors;
      }
  
      @Override
      public int throttleTimeMs() {
          return data.throttleTimeMs();
      }
  
      @Override
      public void maybeSetThrottleTimeMs(int throttleTimeMs) {
          data.setThrottleTimeMs(throttleTimeMs);
      }
  
      @Override
      public FetchSnapshotResponseData data() {
          return data;
      }
  
      /**
       * Creates a FetchSnapshotResponseData with a top level error.
       *
       * @param error the top level error
       * @return the created fetch snapshot response data
       */
      public static FetchSnapshotResponseData withTopLevelError(Errors error) {
          return new FetchSnapshotResponseData().setErrorCode(error.code());
      }
  
      /**
       * Finds the PartitionSnapshot for a given topic partition.
       *
       * @param data the fetch snapshot response data
       * @param topicPartition the topic partition to find
       * @return the response partition snapshot if found, otherwise an empty Optional
       */
      public static Optional<FetchSnapshotResponseData.PartitionSnapshot> forTopicPartition(
          FetchSnapshotResponseData data,
          TopicPartition topicPartition
      ) {
          return data
              .topics()
              .stream()
              .filter(topic -> topic.name().equals(topicPartition.topic()))
              .flatMap(topic -> topic.partitions().stream())
              .filter(partition -> partition.index() == topicPartition.partition())
              .findAny();
      }
  
      public static FetchSnapshotResponse parse(Readable readable, short version) {
          return new FetchSnapshotResponse(new FetchSnapshotResponseData(readable, version));
      }
  }
  