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.streams.kstream.internals;
  
  import org.apache.kafka.common.serialization.Deserializer;
  import org.apache.kafka.common.serialization.Serde;
  import org.apache.kafka.common.serialization.Serializer;
  import org.apache.kafka.streams.processor.api.ProcessorContext;
  import org.apache.kafka.streams.processor.internals.SerdeGetter;
  
  /**
   * If a component's serdes are Wrapping serdes, then they require a little extra setup
   * to be fully initialized at run time.
   */
  public class WrappingNullableUtils {
  
      @SuppressWarnings({"unchecked", "resource"})
      private static <T> Deserializer<T> prepareDeserializer(final Deserializer<T> specificDeserializer, final ProcessorContext<?, ?> context, final boolean isKey) {
          final Deserializer<T> deserializerToUse;
  
          if (specificDeserializer == null) {
              deserializerToUse = (Deserializer<T>) (isKey ? context.keySerde().deserializer() : context.valueSerde().deserializer());
          } else {
              deserializerToUse = specificDeserializer;
              initNullableDeserializer(deserializerToUse, new SerdeGetter(context));
          }
          return deserializerToUse;
      }
  
      @SuppressWarnings({"unchecked", "resource"})
      private static <T> Serializer<T> prepareSerializer(final Serializer<T> specificSerializer, final ProcessorContext<?, ?> context, final boolean isKey) {
          final Serializer<T> serializerToUse;
          if (specificSerializer == null) {
              serializerToUse = (Serializer<T>) (isKey ? context.keySerde().serializer() : context.valueSerde().serializer());
          } else {
              serializerToUse = specificSerializer;
              initNullableSerializer(serializerToUse, new SerdeGetter(context));
          }
          return serializerToUse;
      }
  
      @SuppressWarnings("unchecked")
      private static <T> Serde<T> prepareSerde(final Serde<T> specificSerde, final SerdeGetter getter, final boolean isKey) {
          final Serde<T> serdeToUse;
          if (specificSerde == null) {
              serdeToUse = (Serde<T>) (isKey ? getter.keySerde() : getter.valueSerde());
          } else {
              serdeToUse = specificSerde;
          }
          if (serdeToUse instanceof WrappingNullableSerde) {
              ((WrappingNullableSerde<?, ?, ?>) serdeToUse).setIfUnset(getter);
          }
          return serdeToUse;
      }
  
      public static <K> Deserializer<K> prepareKeyDeserializer(final Deserializer<K> specificDeserializer, final ProcessorContext<K, ?> context) {
          return prepareDeserializer(specificDeserializer, context, true);
      }
  
      public static <V> Deserializer<V> prepareValueDeserializer(final Deserializer<V> specificDeserializer, final ProcessorContext<?, V> context) {
          return prepareDeserializer(specificDeserializer, context, false);
      }
  
      public static <K> Serializer<K> prepareKeySerializer(final Serializer<K> specificSerializer, final ProcessorContext<?, ?> context) {
          return prepareSerializer(specificSerializer, context, true);
      }
  
      public static <V> Serializer<V> prepareValueSerializer(final Serializer<V> specificSerializer, final ProcessorContext<?, ?> context) {
          return prepareSerializer(specificSerializer, context, false);
      }
  
      public static <K> Serde<K> prepareKeySerde(final Serde<K> specificSerde, final SerdeGetter getter) {
          return prepareSerde(specificSerde, getter, true);
      }
  
      public static <V> Serde<V> prepareValueSerde(final Serde<V> specificSerde, final SerdeGetter getter) {
          return prepareSerde(specificSerde, getter, false);
      }
  
      public static <T> void initNullableSerializer(final Serializer<T> specificSerializer, final SerdeGetter getter) {
          if (specificSerializer instanceof WrappingNullableSerializer) {
              ((WrappingNullableSerializer<?, ?, ?>) specificSerializer).setIfUnset(getter);
          }
      }
  
      public static <T> void initNullableDeserializer(final Deserializer<T> specificDeserializer, final SerdeGetter getter) {
          if (specificDeserializer instanceof WrappingNullableDeserializer) {
              ((WrappingNullableDeserializer<?, ?, ?>) specificDeserializer).setIfUnset(getter);
          }
      }
  
  }
  