/
GwtFuturesCatchingSpecialization.java
49 lines (44 loc) · 2.01 KB
/
GwtFuturesCatchingSpecialization.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
/*
* Copyright (C) 2006 The Guava Authors
*
* Licensed 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 com.google.common.util.concurrent;
import com.google.common.base.Function;
import java.util.concurrent.Executor;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* Hidden superclass of {@link Futures} that provides us a place to declare special GWT versions of
* the {@link Futures#catching(ListenableFuture, Class, com.google.common.base.Function)
* Futures.catching} family of methods. Those versions have slightly different signatures.
*/
@ElementTypesAreNonnullByDefault
abstract class GwtFuturesCatchingSpecialization {
/*
* In the GWT versions of the methods (below), every exceptionType parameter is required to be
* Class<Throwable>. To handle only certain kinds of exceptions under GWT, you'll need to write
* your own instanceof tests.
*/
public static <V extends @Nullable Object> ListenableFuture<V> catching(
ListenableFuture<? extends V> input,
Class<Throwable> exceptionType,
Function<? super Throwable, ? extends V> fallback,
Executor executor) {
return AbstractCatchingFuture.create(input, exceptionType, fallback, executor);
}
public static <V extends @Nullable Object> ListenableFuture<V> catchingAsync(
ListenableFuture<? extends V> input,
Class<Throwable> exceptionType,
AsyncFunction<? super Throwable, ? extends V> fallback,
Executor executor) {
return AbstractCatchingFuture.create(input, exceptionType, fallback, executor);
}
}