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.raft;
  
  import org.apache.kafka.common.message.KRaftVersionRecord;
  import org.apache.kafka.common.message.LeaderChangeMessage;
  import org.apache.kafka.common.message.SnapshotFooterRecord;
  import org.apache.kafka.common.message.SnapshotHeaderRecord;
  import org.apache.kafka.common.message.VotersRecord;
  import org.apache.kafka.common.protocol.ApiMessage;
  import org.apache.kafka.common.record.ControlRecordType;
  import org.apache.kafka.common.record.ControlRecordUtils;
  
  import java.nio.ByteBuffer;
  import java.util.Objects;
  
  
  public final class ControlRecord {
      private final ControlRecordType recordType;
      private final ApiMessage message;
  
      public static ControlRecord of(ByteBuffer key, ByteBuffer value) {
          ControlRecordType recordType = ControlRecordType.parse(key);
          final ApiMessage message = switch (recordType) {
              case LEADER_CHANGE -> ControlRecordUtils.deserializeLeaderChangeMessage(value);
              case SNAPSHOT_HEADER -> ControlRecordUtils.deserializeSnapshotHeaderRecord(value);
              case SNAPSHOT_FOOTER -> ControlRecordUtils.deserializeSnapshotFooterRecord(value);
              case KRAFT_VERSION -> ControlRecordUtils.deserializeKRaftVersionRecord(value);
              case KRAFT_VOTERS -> ControlRecordUtils.deserializeVotersRecord(value);
              default -> throw new IllegalArgumentException(String.format("Unknown control record type %s", recordType));
          };
          return new ControlRecord(recordType, message);
      }
  
      //this is for test only
      public static ControlRecord of(ApiMessage message) {
          ControlRecordType recordType;
          if (message instanceof LeaderChangeMessage) {
              recordType = ControlRecordType.LEADER_CHANGE;
          } else if (message instanceof SnapshotHeaderRecord) {
              recordType = ControlRecordType.SNAPSHOT_HEADER;
          } else if (message instanceof SnapshotFooterRecord) {
              recordType = ControlRecordType.SNAPSHOT_FOOTER;
          } else if (message instanceof KRaftVersionRecord) {
              recordType = ControlRecordType.KRAFT_VERSION;
          } else if (message instanceof VotersRecord) {
              recordType = ControlRecordType.KRAFT_VOTERS;
          } else {
              throw new IllegalArgumentException(String.format("Unknown control record type %s", message.getClass()));
          }
          return new ControlRecord(recordType, message);
      }
  
      private ControlRecord(ControlRecordType recordType, ApiMessage message) {
          this.recordType = recordType;
          this.message = message;
      }
  
      public ControlRecordType type() {
          return recordType;
      }
  
      public ApiMessage message() {
          return message;
      }
  
      @Override
      public boolean equals(Object other) {
          if (this == other) return true;
          if (other == null || getClass() != other.getClass()) return false;
          ControlRecord that = (ControlRecord) other;
          return Objects.equals(recordType, that.recordType) &&
              Objects.equals(message, that.message);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(recordType, message);
      }
  
      @Override
      public String toString() {
          return String.format("ControlRecord(recordType=%s, message=%s)", recordType, message);
      }
  }
  