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
|
/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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 android.net.shared;
import android.annotation.NonNull;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collection;
import java.util.function.Function;
/**
* Utility methods to help convert to/from stable parcelables.
* @hide
*/
public final class ParcelableUtil {
// Below methods could be implemented easily with streams, but streams are frowned upon in
// frameworks code.
/**
* Convert a list of BaseType items to an array of ParcelableType items using the specified
* converter function.
*/
public static <ParcelableType, BaseType> ParcelableType[] toParcelableArray(
@NonNull Collection<BaseType> base,
@NonNull Function<BaseType, ParcelableType> conv,
@NonNull Class<ParcelableType> parcelClass) {
final ParcelableType[] out = (ParcelableType[]) Array.newInstance(parcelClass, base.size());
int i = 0;
for (BaseType b : base) {
out[i] = conv.apply(b);
i++;
}
return out;
}
/**
* Convert an array of ParcelableType items to a list of BaseType items using the specified
* converter function.
*/
public static <ParcelableType, BaseType> ArrayList<BaseType> fromParcelableArray(
@NonNull ParcelableType[] parceled, @NonNull Function<ParcelableType, BaseType> conv) {
final ArrayList<BaseType> out = new ArrayList<>(parceled.length);
for (ParcelableType t : parceled) {
out.add(conv.apply(t));
}
return out;
}
}
|
