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1   /*
2    * Copyright 2015 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.util;
17  
18  import io.netty.util.concurrent.Future;
19  import io.netty.util.concurrent.Promise;
20  
21  public interface AsyncMapping<IN, OUT> {
22  
23      /**
24       * Returns the {@link Future} that will provide the result of the mapping. The given {@link Promise} will
25       * be fulfilled when the result is available.
26       */
27      Future<OUT> map(IN input, Promise<OUT> promise);
28  }