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.streams.processor.ConnectedStoreProvider;
  import org.apache.kafka.streams.processor.api.FixedKeyProcessorSupplier;
  
  /**
   * A {@code ValueTransformerSupplier} interface which can create one or more {@link ValueTransformer} instances.
   * <p>
   * The supplier should always generate a new instance each time {@link ValueTransformerSupplier#get()} gets called. Creating
   * a single {@link ValueTransformer} object and returning the same object reference in {@link ValueTransformerSupplier#get()} would be
   * a violation of the supplier pattern and leads to runtime exceptions.
   *
   * @param <V>  value type
   * @param <VR> transformed value type
   * @see ValueTransformer
   * @see ValueTransformerWithKey
   * @see ValueTransformerWithKeySupplier
   * @see Transformer
   * @see TransformerSupplier
   * @deprecated Since 4.0. Use {@link FixedKeyProcessorSupplier} instead.
   */
  @Deprecated
  @FunctionalInterface
  public interface ValueTransformerSupplier<V, VR> extends ConnectedStoreProvider {
  
      /**
       * Return a newly constructed {@link ValueTransformer} instance.
       * The supplier should always generate a new instance each time {@link ValueTransformerSupplier#get()} gets called.
       * <p>
       * Creating a single {@link ValueTransformer} object and returning the same object reference in {@link ValueTransformerSupplier#get()}
       * is a violation of the supplier pattern and leads to runtime exceptions.
       *
       * @return a newly constructed {@link ValueTransformer} instance
       */
      ValueTransformer<V, VR> get();
  }
  