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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 package org.chromium.base; | |
6 | |
7 import android.os.Parcel; | |
8 import android.os.Parcelable; | |
9 | |
10 import org.chromium.base.annotations.CalledByNative; | |
11 | |
12 /** | |
13 * This class mirrors unguessable_token.h . Since tokens are passed by value, | |
14 * we don't bother to maintain a native token. This implements Parcelable so | |
15 * that it may be sent via binder. | |
16 * | |
17 * To get one of these from native, one must start with a | |
18 * base::UnguessableToken, then create a java object from it. See | |
nyquist
2016/11/08 19:04:42
Nit: Java here and in the TODO
liberato (no reviews please)
2016/11/09 18:18:33
Done.
| |
19 * jni_unguessable_token.h for information. | |
20 */ | |
21 public class UnguessableToken implements Parcelable { | |
22 private long mHigh; | |
nyquist
2016/11/08 19:04:42
final for these two fields.
liberato (no reviews please)
2016/11/09 18:18:33
Done.
| |
23 private long mLow; | |
24 | |
25 private UnguessableToken(long high, long low) { | |
26 mHigh = high; | |
27 mLow = low; | |
28 } | |
29 | |
30 @CalledByNative | |
31 private static UnguessableToken create(long high, long low) { | |
32 return new UnguessableToken(high, low); | |
33 } | |
34 | |
35 @CalledByNative | |
36 private long getHighForSerialization() { | |
37 return mHigh; | |
38 } | |
39 | |
40 @CalledByNative | |
41 private long getLowForSerialization() { | |
42 return mLow; | |
43 } | |
44 | |
45 @Override | |
46 public int describeContents() { | |
47 return 0; | |
48 } | |
49 | |
50 @Override | |
51 public void writeToParcel(Parcel dest, int flags) { | |
52 dest.writeLong(mHigh); | |
53 dest.writeLong(mLow); | |
54 } | |
55 | |
56 public static final Parcelable.Creator<UnguessableToken> CREATOR = | |
57 new Parcelable.Creator<UnguessableToken>() { | |
58 @Override | |
59 public UnguessableToken createFromParcel(Parcel source) { | |
60 final long high = source.readLong(); | |
nyquist
2016/11/08 19:04:42
Nit: unnecessary final here and below
liberato (no reviews please)
2016/11/09 18:18:33
Done.
| |
61 final long low = source.readLong(); | |
62 if (high == 0 || low == 0) { | |
63 // Refuse to create an empty UnguessableToken. | |
64 return null; | |
65 } | |
66 return new UnguessableToken(high, low); | |
67 } | |
68 | |
69 @Override | |
70 public UnguessableToken[] newArray(int size) { | |
71 return new UnguessableToken[size]; | |
72 } | |
73 }; | |
74 | |
75 // To avoid unwieldy calls in JNI for tests, parcel and unparcel. | |
76 // TODO(liberato): It would be nice if we could include this only with a | |
77 // java driver that's linked only with unit tests, but i don't see a way | |
78 // to do that. | |
79 @CalledByNative | |
80 private UnguessableToken parcelAndUnparcelForTesting() { | |
81 Parcel parcel = Parcel.obtain(); | |
82 writeToParcel(parcel, 0); | |
83 | |
84 // Rewind the parcel and un-parcel. | |
85 parcel.setDataPosition(0); | |
86 UnguessableToken token = CREATOR.createFromParcel(parcel); | |
87 parcel.recycle(); | |
88 | |
89 return token; | |
90 } | |
91 }; | |
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