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.streams.kstream.KeyValueMapper;
  import org.apache.kafka.streams.kstream.ValueJoinerWithKey;
  import org.apache.kafka.streams.processor.api.Processor;
  import org.apache.kafka.streams.processor.api.ProcessorSupplier;
  import org.apache.kafka.streams.state.StoreBuilder;
  
  import java.time.Duration;
  import java.util.Collections;
  import java.util.Optional;
  import java.util.Set;
  
  class KStreamKTableJoin<StreamKey, StreamValue, TableValue, VOut> implements ProcessorSupplier<StreamKey, StreamValue, StreamKey, VOut> {
  
      private final KeyValueMapper<StreamKey, StreamValue, StreamKey> keyValueMapper = (key, value) -> key;
      private final KTableValueGetterSupplier<StreamKey, TableValue> valueGetterSupplier;
      private final ValueJoinerWithKey<? super StreamKey, ? super StreamValue, ? super TableValue, ? extends VOut> joiner;
      private final boolean leftJoin;
      private final Optional<Duration> gracePeriod;
      private final Optional<String> storeName;
      private final Set<StoreBuilder<?>> stores;
  
      KStreamKTableJoin(final KTableValueGetterSupplier<StreamKey, TableValue> valueGetterSupplier,
                        final ValueJoinerWithKey<? super StreamKey, ? super StreamValue, ? super TableValue, ? extends VOut> joiner,
                        final boolean leftJoin,
                        final Optional<Duration> gracePeriod,
                        final Optional<StoreBuilder<?>> bufferStoreBuilder) {
          this.valueGetterSupplier = valueGetterSupplier;
          this.joiner = joiner;
          this.leftJoin = leftJoin;
          this.gracePeriod = gracePeriod;
          this.storeName = bufferStoreBuilder.map(StoreBuilder::name);
  
          this.stores = bufferStoreBuilder.<Set<StoreBuilder<?>>>map(Collections::singleton).orElse(null);
      }
  
      @Override
      public Set<StoreBuilder<?>> stores() {
          return stores;
      }
  
      @Override
      public Processor<StreamKey, StreamValue, StreamKey, VOut> get() {
          return new KStreamKTableJoinProcessor<>(valueGetterSupplier.get(), keyValueMapper, joiner, leftJoin, gracePeriod, storeName);
      }
  
  }
  