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;
  
  import org.apache.kafka.clients.consumer.ConsumerConfig;
  import org.apache.kafka.common.KafkaException;
  import org.apache.kafka.common.errors.InterruptException;
  import org.apache.kafka.common.internals.Plugin;
  import org.apache.kafka.common.metrics.Metrics;
  import org.apache.kafka.common.serialization.Deserializer;
  import org.apache.kafka.common.utils.Utils;
  
  import java.util.Collections;
  import java.util.Objects;
  import java.util.concurrent.atomic.AtomicReference;
  
  public class Deserializers<K, V> implements AutoCloseable {
  
      private final Plugin<Deserializer<K>> keyDeserializerPlugin;
      private final Plugin<Deserializer<V>> valueDeserializerPlugin;
  
      public Deserializers(Deserializer<K> keyDeserializer, Deserializer<V> valueDeserializer, Metrics metrics) {
          this.keyDeserializerPlugin = Plugin.wrapInstance(
                  Objects.requireNonNull(keyDeserializer, "Key deserializer provided to Deserializers should not be null"),
                  metrics,
                  ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG);
          this.valueDeserializerPlugin = Plugin.wrapInstance(
                  Objects.requireNonNull(valueDeserializer, "Value deserializer provided to Deserializers should not be null"),
                  metrics,
                  ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG);
      }
  
      @SuppressWarnings("unchecked")
      public Deserializers(ConsumerConfig config, Deserializer<K> keyDeserializer, Deserializer<V> valueDeserializer, Metrics metrics) {
          String clientId = config.getString(ConsumerConfig.CLIENT_ID_CONFIG);
  
          if (keyDeserializer == null) {
              keyDeserializer = config.getConfiguredInstance(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, Deserializer.class);
              keyDeserializer.configure(config.originals(Collections.singletonMap(ConsumerConfig.CLIENT_ID_CONFIG, clientId)), true);
          } else {
              config.ignore(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG);
          }
          this.keyDeserializerPlugin = Plugin.wrapInstance(keyDeserializer, metrics, ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG);
  
          if (valueDeserializer == null) {
              valueDeserializer = config.getConfiguredInstance(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, Deserializer.class);
              valueDeserializer.configure(config.originals(Collections.singletonMap(ConsumerConfig.CLIENT_ID_CONFIG, clientId)), false);
          } else {
              config.ignore(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG);
          }
          this.valueDeserializerPlugin = Plugin.wrapInstance(valueDeserializer, metrics, ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG);
      }
  
      public Deserializer<K> keyDeserializer() {
          return keyDeserializerPlugin.get();
      }
  
      public Deserializer<V> valueDeserializer() {
          return valueDeserializerPlugin.get();
      }
  
      @Override
      public void close() {
          AtomicReference<Throwable> firstException = new AtomicReference<>();
          Utils.closeQuietly(keyDeserializerPlugin, "key deserializer", firstException);
          Utils.closeQuietly(valueDeserializerPlugin, "value deserializer", firstException);
          Throwable exception = firstException.get();
  
          if (exception != null) {
              if (exception instanceof InterruptException) {
                  throw (InterruptException) exception;
              }
              throw new KafkaException("Failed to close deserializers", exception);
          }
      }
  
      @Override
      public String toString() {
          return "Deserializers{" +
                  "keyDeserializer=" + keyDeserializerPlugin.get() +
                  ", valueDeserializer=" + valueDeserializerPlugin.get() +
                  '}';
      }
  }
  