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1 // Copyright 2015 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.chrome.browser.ntp; | |
6 | |
7 import org.chromium.base.annotations.CalledByNative; | |
8 import org.chromium.chrome.browser.profiles.Profile; | |
9 | |
10 /** | |
11 * Retrieve the user's interests. | |
12 */ | |
13 public class InterestsService { | |
14 private long mNativeInterestsService; | |
15 | |
16 /** | |
17 * A user's interest. | |
18 */ | |
19 public static class Interest { | |
20 private final String mName; | |
21 private final String mImageUrl; | |
22 private final double mRelevance; | |
23 | |
24 public Interest(String name, String imageUrl, double relevance) { | |
25 mName = name; | |
26 mImageUrl = imageUrl; | |
27 mRelevance = relevance; | |
28 } | |
29 | |
30 public String getName() { | |
31 return mName; | |
32 } | |
33 | |
34 public String getImageUrl() { | |
35 return mImageUrl; | |
36 } | |
37 | |
38 public double getRelevance() { | |
39 return mRelevance; | |
40 } | |
41 } | |
42 /** | |
43 * Interface for receiving the interests of a user. | |
44 */ | |
45 public interface GetInterestsCallback { | |
46 /** | |
47 * Callback method for fetching the interests of a user. | |
48 * | |
49 * @param interests The array of interests. Null if error. | |
50 */ | |
51 @CalledByNative("GetInterestsCallback") | |
52 public void onInterestsAvailableCallback(Interest[] interests); | |
53 } | |
54 | |
55 /** | |
56 * InterestsService constructor requires a valid user profile object. | |
57 * | |
58 * @param profile The profile for which to fetch the interests | |
59 */ | |
60 public InterestsService(Profile profile) { | |
61 mNativeInterestsService = nativeInit(profile); | |
62 } | |
63 | |
64 /** | |
65 * Cleans up the C++ side of this class. This instance must not be used afte
r calling destroy(). | |
66 */ | |
67 public void destroy() { | |
68 assert mNativeInterestsService != 0; | |
69 nativeDestroy(mNativeInterestsService); | |
70 mNativeInterestsService = 0; | |
71 } | |
72 | |
73 public void getInterests(final GetInterestsCallback callback) { | |
74 GetInterestsCallback wrappedCallback = new GetInterestsCallback() { | |
75 @Override | |
76 public void onInterestsAvailableCallback(Interest[] interests) { | |
77 callback.onInterestsAvailableCallback(interests); | |
78 } | |
79 }; | |
80 | |
81 nativeGetInterests(mNativeInterestsService, wrappedCallback); | |
82 } | |
83 | |
84 /* | |
85 * Helper methods for the native part. | |
86 */ | |
87 @CalledByNative | |
88 private static Interest createInterest(String name, String imageUrl, double
relevance) { | |
89 return new Interest(name, imageUrl, relevance); | |
90 } | |
91 | |
92 @CalledByNative | |
93 private static Interest[] createInterestsArray(int size) { | |
94 return new Interest[size]; | |
95 } | |
96 | |
97 private native long nativeInit(Profile profile); | |
98 private native void nativeDestroy(long nativeInterestsService); | |
99 private native void nativeGetInterests( | |
100 long nativeInterestsService, GetInterestsCallback callback); | |
101 } | |
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