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.consumer.internals.events;
  
  import org.apache.kafka.clients.consumer.OffsetAndTimestamp;
  import org.apache.kafka.clients.consumer.internals.OffsetAndTimestampInternal;
  import org.apache.kafka.common.TopicPartition;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Event for retrieving partition offsets by performing a
   * {@link org.apache.kafka.common.requests.ListOffsetsRequest ListOffsetsRequest}.
   * This event is created with a map of {@link TopicPartition} and target timestamps to search
   * offsets for. It is completed with the map of {@link TopicPartition} and
   * {@link OffsetAndTimestamp} found (offset of the first message whose timestamp is greater than
   * or equals to the target timestamp)
   */
  public class ListOffsetsEvent extends CompletableApplicationEvent<Map<TopicPartition, OffsetAndTimestampInternal>> {
      private final Map<TopicPartition, Long> timestampsToSearch;
      private final boolean requireTimestamps;
  
      public ListOffsetsEvent(Map<TopicPartition, Long> timestampToSearch,
                              long deadlineMs,
                              boolean requireTimestamps) {
          super(Type.LIST_OFFSETS, deadlineMs);
          this.timestampsToSearch = Collections.unmodifiableMap(timestampToSearch);
          this.requireTimestamps = requireTimestamps;
      }
  
      /**
       * Build result representing that no offsets were found as part of the current event.
       *
       * @return Map containing all the partitions the event was trying to get offsets for, and
       * null {@link OffsetAndTimestamp} as value
       */
      public <T> Map<TopicPartition, T> emptyResults() {
          Map<TopicPartition, T> result = new HashMap<>();
          timestampsToSearch.keySet().forEach(tp -> result.put(tp, null));
          return result;
      }
  
      public Map<TopicPartition, Long> timestampsToSearch() {
          return timestampsToSearch;
      }
  
      public boolean requireTimestamps() {
          return requireTimestamps;
      }
  
      @Override
      public boolean requireSubscriptionMetadata() {
          return true;
      }
  
      @Override
      public String toStringBase() {
          return super.toStringBase() +
                  ", timestampsToSearch=" + timestampsToSearch +
                  ", requireTimestamps=" + requireTimestamps;
      }
  }