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1   /*
2    * Copyright (C) 2006 The Guava Authors
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5    * in compliance with the License. You may obtain a copy of the License at
6    *
7    * http://www.apache.org/licenses/LICENSE-2.0
8    *
9    * Unless required by applicable law or agreed to in writing, software distributed under the License
10   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11   * or implied. See the License for the specific language governing permissions and limitations under
12   * the License.
13   */
14  
15  package com.google.common.util.concurrent;
16  
17  import com.google.common.annotations.GwtCompatible;
18  
19  /**
20   * Hidden superclass of {@link Futures} that provides us a place to declare special GWT versions of
21   * the {@link Futures#catching(ListenableFuture, Class, com.google.common.base.Function,
22   * java.util.concurrent.Executor) Futures.catching} family of methods. Those versions have slightly
23   * different signatures.
24   */
25  @GwtCompatible(emulated = true)
26  abstract class GwtFuturesCatchingSpecialization {
27    /*
28     * This server copy of the class is empty. The corresponding GWT copy contains alternative
29     * versions of catching() and catchingAsync() with slightly different signatures from the ones
30     * found in Futures.java.
31     */
32  }