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.state.internals;
  
  import org.apache.kafka.common.serialization.Serde;
  import org.apache.kafka.common.utils.Bytes;
  import org.apache.kafka.common.utils.Time;
  import org.apache.kafka.streams.processor.internals.SerdeGetter;
  import org.apache.kafka.streams.state.TimestampedWindowStore;
  import org.apache.kafka.streams.state.ValueAndTimestamp;
  import org.apache.kafka.streams.state.WindowStore;
  
  /**
   * A Metered {@link TimestampedWindowStore} wrapper that is used for recording operation metrics, and hence its
   * inner WindowStore implementation do not need to provide its own metrics collecting functionality.
   * The inner {@link WindowStore} of this class is of type &lt;Bytes,byte[]&gt;, hence we use {@link Serde}s
   * to convert from &lt;K,ValueAndTimestamp&lt;V&gt&gt; to &lt;Bytes,byte[]&gt;
   *
   * @param <K>
   * @param <V>
   */
  class MeteredTimestampedWindowStore<K, V>
      extends MeteredWindowStore<K, ValueAndTimestamp<V>>
      implements TimestampedWindowStore<K, V> {
  
      MeteredTimestampedWindowStore(final WindowStore<Bytes, byte[]> inner,
                                    final long windowSizeMs,
                                    final String metricScope,
                                    final Time time,
                                    final Serde<K> keySerde,
                                    final Serde<ValueAndTimestamp<V>> valueSerde) {
          super(inner, windowSizeMs, metricScope, time, keySerde, valueSerde);
      }
  
      @SuppressWarnings("unchecked")
      @Override
      protected Serde<ValueAndTimestamp<V>> prepareValueSerde(final Serde<ValueAndTimestamp<V>> valueSerde, final SerdeGetter getter) {
          if (valueSerde == null) {
              return new ValueAndTimestampSerde<>((Serde<V>) getter.valueSerde());
          } else {
              return super.prepareValueSerde(valueSerde, getter);
          }
      }
  }
  