1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://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,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.telephony.uicc.euicc.async;
18
19import android.annotation.Nullable;
20import android.os.Handler;
21
22/**
23 * Helper on {@link AsyncResultCallback}.
24 *
25 * @hide
26 */
27public final class AsyncResultHelper {
28    /**
29     * Calls the {@code callback} to return the {@code result} object. The {@code callback} will be
30     * run in the {@code handler}. If the {@code handler} is null, the callback will be called
31     * immediately.
32     *
33     * @param <T> Result type.
34     */
35    public static <T> void returnResult(
36            final T result, final AsyncResultCallback<T> callback, @Nullable Handler handler) {
37        if (handler == null) {
38            callback.onResult(result);
39        } else {
40            handler.post(
41                    new Runnable() {
42                        @Override
43                        public void run() {
44                            callback.onResult(result);
45                        }
46                    });
47        }
48    }
49
50    /**
51     * Calls the {@code callback} to return the thrown {@code e} exception. The {@code callback}
52     * will be run in the {@code handler}. If the {@code handler} is null, the callback will be
53     * called immediately.
54     */
55    public static void throwException(
56            final Throwable e, final AsyncResultCallback<?> callback, @Nullable Handler handler) {
57        if (handler == null) {
58            callback.onException(e);
59        } else {
60            handler.post(
61                    new Runnable() {
62                        @Override
63                        public void run() {
64                            callback.onException(e);
65                        }
66                    });
67        }
68    }
69
70    private AsyncResultHelper() {}
71}
72