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.common.runtime;
  
  import java.nio.ByteBuffer;
  
  /**
   * Deserializer to translates bytes to T.
   *
   * @param <T> The record type.
   */
  public interface Deserializer<T> {
      /**
       * UnknownRecordTypeException is thrown when the Deserializer encounters
       * an unknown record type.
       */
      class UnknownRecordTypeException extends RuntimeException {
          private final short unknownType;
  
          public UnknownRecordTypeException(short unknownType) {
              super(String.format("Found an unknown record type %d", unknownType));
              this.unknownType = unknownType;
          }
  
          public short unknownType() {
              return unknownType;
          }
      }
  
      class UnknownRecordVersionException extends RuntimeException {
          private final short type;
          private final short unknownVersion;
  
          public UnknownRecordVersionException(short type, short unknownVersion) {
              super(String.format("Found an unknown record version %d for %d type", unknownVersion, type));
              this.type = type;
              this.unknownVersion = unknownVersion;
          }
  
          public short type() {
              return type;
          }
  
          public short unknownVersion() {
              return unknownVersion;
          }
      }
  
      /**
       * Deserializes the key and the value.
       *
       * @param key   The key or null if not present.
       * @param value The value or null if not present.
       * @return The record.
       */
      T deserialize(ByteBuffer key, ByteBuffer value) throws RuntimeException;
  }
  