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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*
* Copyright (C) 2007 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 java.util.concurrent.Executor;
import java.util.concurrent.Future;
import jsinterop.annotations.JsFunction;
import jsinterop.annotations.JsMethod;
import jsinterop.annotations.JsOptional;
import jsinterop.annotations.JsPackage;
import jsinterop.annotations.JsType;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* Java super source for ListenableFuture, implementing a structural thenable via a default method.
* For restrictions, please refer to the documentation of the then() method.
*/
@ElementTypesAreNonnullByDefault
public interface ListenableFuture<V extends @Nullable Object> extends Future<V>, IThenable<V> {
void addListener(Runnable listener, Executor executor);
/** Note that this method is not expected to be overridden. */
@JsMethod
@Override
default <R extends @Nullable Object> IThenable<R> then(
@JsOptional IThenOnFulfilledCallbackFn<? super V, ? extends R> onFulfilled,
@JsOptional IThenOnRejectedCallbackFn<? extends R> onRejected) {
return new Promise<V>(
(resolve, reject) -> {
Futures.addCallback(
this,
new FutureCallback<V>() {
@Override
public void onSuccess(V value) {
resolve.onInvoke(value);
}
@Override
public void onFailure(Throwable throwable) {
reject.onInvoke(throwable.getBackingJsObject());
}
},
MoreExecutors.directExecutor());
})
.then(onFulfilled, onRejected);
}
}
/**
* Subset of the elemental2 IThenable interface without the single-parameter overload, which allows
* us to implement it using a default implementation in J2cl ListenableFuture.
*/
@JsType(isNative = true, namespace = JsPackage.GLOBAL, name = "IThenable")
interface IThenable<T extends @Nullable Object> {
<V extends @Nullable Object> IThenable<V> then(
@JsOptional IThenOnFulfilledCallbackFn<? super T, ? extends V> onFulfilled,
@JsOptional IThenOnRejectedCallbackFn<? extends V> onRejected);
@JsFunction
interface IThenOnFulfilledCallbackFn<T extends @Nullable Object, V extends @Nullable Object> {
V onInvoke(T p0);
}
@JsFunction
interface IThenOnRejectedCallbackFn<V extends @Nullable Object> {
V onInvoke(Object p0);
}
}
/** Subset of the elemental2 Promise API. */
@JsType(isNative = true, namespace = JsPackage.GLOBAL, name = "Promise")
class Promise<T extends @Nullable Object> implements IThenable<T> {
@JsFunction
interface PromiseExecutorCallbackFn<T extends @Nullable Object> {
@JsFunction
interface ResolveCallbackFn<T extends @Nullable Object> {
void onInvoke(T value);
}
@JsFunction
interface RejectCallbackFn {
void onInvoke(Object error);
}
void onInvoke(ResolveCallbackFn<T> resolve, RejectCallbackFn reject);
}
public Promise(PromiseExecutorCallbackFn<T> executor) {}
@Override
public native <V extends @Nullable Object> Promise<V> then(
@JsOptional IThenOnFulfilledCallbackFn<? super T, ? extends V> onFulfilled,
@JsOptional IThenOnRejectedCallbackFn<? extends V> onRejected);
}
|
