/*
* 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.annotation.InterfaceStability;
/**
* A {@code TransformerSupplier} interface which can create one or more {@link Transformer} instances.
*
* @param <K> key type
* @param <V> value type
* @param <R> {@link org.apache.kafka.streams.KeyValue KeyValue} return type (both key and value type can be set
* arbitrarily)
* @see Transformer
* @see KStream#transform(TransformerSupplier, String...)
* @see ValueTransformer
* @see ValueTransformerSupplier
* @see KStream#transformValues(ValueTransformerSupplier, String...)
*/
@InterfaceStability.Unstable
public interface TransformerSupplier<K, V, R> {
/**
* Return a new {@link Transformer} instance.
*
* @return a new {@link Transformer} instance
*/
Transformer<K, V, R> get();
}