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;
  
  import org.apache.kafka.common.serialization.Deserializer;
  import org.apache.kafka.common.serialization.Serde;
  import org.apache.kafka.common.serialization.Serdes;
  import org.apache.kafka.common.serialization.Serializer;
  
  public class WindowedSerdes {
  
      public static class TimeWindowedSerde<T> extends Serdes.WrapperSerde<Windowed<T>> {
          // Default constructor needed for reflection object creation
          public TimeWindowedSerde() {
              super(new TimeWindowedSerializer<>(), new TimeWindowedDeserializer<>());
          }
  
          // This constructor can be used for serialize/deserialize a windowed topic
          public TimeWindowedSerde(final Serde<T> inner, final long windowSize) {
              super(new TimeWindowedSerializer<>(inner.serializer()), new TimeWindowedDeserializer<>(inner.deserializer(), windowSize));
          }
  
          // Helper method for users to specify whether the input topic is a changelog topic for deserializing the key properly.
          public TimeWindowedSerde<T> forChangelog(final boolean isChangelogTopic) {
              final TimeWindowedDeserializer<T> deserializer = (TimeWindowedDeserializer<T>) this.deserializer();
              deserializer.setIsChangelogTopic(isChangelogTopic);
              return this;
          }
      }
  
      public static class SessionWindowedSerde<T> extends Serdes.WrapperSerde<Windowed<T>> {
          // Default constructor needed for reflection object creation
          public SessionWindowedSerde() {
              super(new SessionWindowedSerializer<>(), new SessionWindowedDeserializer<>());
          }
  
          public SessionWindowedSerde(final Serde<T> inner) {
              super(new SessionWindowedSerializer<>(inner.serializer()), new SessionWindowedDeserializer<>(inner.deserializer()));
          }
      }
  
      /**
       * Construct a {@code TimeWindowedSerde} object to deserialize changelog topic
       * for the specified inner class type and window size.
       */
      public static <T> Serde<Windowed<T>> timeWindowedSerdeFrom(final Class<T> type, final long windowSize) {
          return new TimeWindowedSerde<>(Serdes.serdeFrom(type), windowSize);
      }
  
      /**
       * Construct a {@code SessionWindowedSerde} object for the specified inner class type.
       */
      public static <T> Serde<Windowed<T>> sessionWindowedSerdeFrom(final Class<T> type) {
          return new SessionWindowedSerde<>(Serdes.serdeFrom(type));
      }
  
      @SuppressWarnings("rawtypes")
      static void verifyInnerSerializerNotNull(final Serializer inner,
                                               final Serializer wrapper) {
          if (inner == null) {
              throw new NullPointerException("Inner serializer is `null`. " +
                  "User code must use constructor `" + wrapper.getClass().getSimpleName() + "(final Serializer<T> inner)` " +
                  "instead of the no-arg constructor.");
          }
      }
  
      @SuppressWarnings("rawtypes")
      static void verifyInnerDeserializerNotNull(final Deserializer inner,
                                                 final Deserializer wrapper) {
          if (inner == null) {
              throw new NullPointerException("Inner deserializer is `null`. " +
                  "User code must use constructor `" + wrapper.getClass().getSimpleName() + "(final Deserializer<T> inner)` " +
                  "instead of the no-arg constructor.");
          }
      }
  }
  