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.camel.component.kafka.consumer.support.classic;
  
  import org.apache.camel.component.kafka.KafkaConfiguration;
  import org.apache.camel.component.kafka.SeekPolicy;
  import org.apache.camel.spi.StateRepository;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  final class AssignmentAdapterHelper {
  
      private static final NoOpPartitionAssignmentAdapter NO_OP_ASSIGNMENT_ADAPTER = new NoOpPartitionAssignmentAdapter();
      private static final Logger LOG = LoggerFactory.getLogger(AssignmentAdapterHelper.class);
  
      private AssignmentAdapterHelper() {
      }
  
      public static PartitionAssignmentAdapter resolveBuiltinResumeAdapters(KafkaConfiguration configuration) {
          LOG.debug("No resume strategy was provided ... checking for built-ins ...");
          StateRepository<String, String> offsetRepository = configuration.getOffsetRepository();
          SeekPolicy seekTo = configuration.getSeekTo();
  
          if (offsetRepository != null) {
              LOG.info("Using resume from offset strategy");
              return new OffsetPartitionAssignmentAdapter(offsetRepository);
          } else if (seekTo != null) {
              LOG.info("Using resume from seek policy strategy with seeking from {}", seekTo);
              return new SeekPolicyPartitionAssignmentAdapter(seekTo);
          }
  
          LOG.info("Using NO-OP resume strategy");
          return NO_OP_ASSIGNMENT_ADAPTER;
      }
  }
  