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.coordinator.group.modern.share;
  
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.coordinator.common.runtime.CoordinatorRecord;
  import org.apache.kafka.coordinator.group.GroupCoordinatorRecordHelpers;
  import org.apache.kafka.coordinator.group.modern.Assignment;
  import org.apache.kafka.image.TopicsImage;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  public class ShareGroupBuilder {
      private final String groupId;
      private final int groupEpoch;
      private int assignmentEpoch;
      private final Map<String, ShareGroupMember> members = new HashMap<>();
      private final Map<String, Assignment> assignments = new HashMap<>();
      private long metadataHash = 0L;
  
      public ShareGroupBuilder(String groupId, int groupEpoch) {
          this.groupId = groupId;
          this.groupEpoch = groupEpoch;
          this.assignmentEpoch = 0;
      }
  
      public ShareGroupBuilder withMember(ShareGroupMember member) {
          this.members.put(member.memberId(), member);
          return this;
      }
  
      public ShareGroupBuilder withMetadataHash(long metadataHash) {
          this.metadataHash = metadataHash;
          return this;
      }
  
      public ShareGroupBuilder withAssignment(String memberId, Map<Uuid, Set<Integer>> assignment) {
          this.assignments.put(memberId, new Assignment(assignment));
          return this;
      }
  
      public ShareGroupBuilder withAssignmentEpoch(int assignmentEpoch) {
          this.assignmentEpoch = assignmentEpoch;
          return this;
      }
  
      public List<CoordinatorRecord> build(TopicsImage topicsImage) {
          List<CoordinatorRecord> records = new ArrayList<>();
  
          // Add subscription records for members.
          members.forEach((memberId, member) ->
              records.add(GroupCoordinatorRecordHelpers.newShareGroupMemberSubscriptionRecord(groupId, member))
          );
  
          // Add group epoch record.
          records.add(GroupCoordinatorRecordHelpers.newShareGroupEpochRecord(groupId, groupEpoch, metadataHash));
  
          // Add target assignment records.
          assignments.forEach((memberId, assignment) ->
              records.add(GroupCoordinatorRecordHelpers.newShareGroupTargetAssignmentRecord(groupId, memberId, assignment.partitions()))
          );
  
          // Add target assignment epoch.
          records.add(GroupCoordinatorRecordHelpers.newShareGroupTargetAssignmentEpochRecord(groupId, assignmentEpoch));
  
          // Add current assignment records for members.
          members.forEach((memberId, member) ->
                  records.add(GroupCoordinatorRecordHelpers.newShareGroupCurrentAssignmentRecord(groupId, member))
          );
  
          return records;
      }
  }
  