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.processor.api.ProcessorSupplier;
  
  public interface KTableProcessorSupplier<KIn, VIn, KOut, VOut> extends ProcessorSupplier<KIn, Change<VIn>, KOut, Change<VOut>> {
  
      KTableValueGetterSupplier<KOut, VOut> view();
  
      /**
       * Potentially enables sending old values.
       * <p>
       * If {@code forceMaterialization} is {@code true}, the method will force the materialization of upstream nodes to
       * enable sending old values.
       * <p>
       * If {@code forceMaterialization} is {@code false}, the method will only enable the sending of old values <i>if</i>
       * an upstream node is already materialized.
       *
       * @param forceMaterialization indicates if an upstream node should be forced to materialize to enable sending old
       *                             values.
       * @return {@code true} if sending old values is enabled, i.e. either because {@code forceMaterialization} was
       * {@code true} or some upstream node is materialized.
       */
      boolean enableSendingOldValues(boolean forceMaterialization);
  }
  