RemovalClient.java revision cb2ce6f1f0deef80943ece093ae40bacc1f57c44 
1/**
2 * Copyright (C) 2016 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.server.fingerprint;
18
19import android.content.Context;
20import android.hardware.fingerprint.FingerprintManager;
21import android.hardware.fingerprint.IFingerprintDaemon;
22import android.hardware.fingerprint.IFingerprintServiceReceiver;
23import android.os.IBinder;
24import android.os.RemoteException;
25import android.os.UserHandle;
26import android.util.Slog;
27
28/**
29 * A class to keep track of the remove state for a given client.
30 */
31public abstract class RemovalClient extends ClientMonitor {
32    private int mFingerId;
33    private int mUserIdForRemove;
34
35    public RemovalClient(Context context, long halDeviceId, IBinder token,
36            IFingerprintServiceReceiver receiver, int userId, int groupId, int fingerId,
37            boolean restricted, String owner) {
38        super(context, halDeviceId, token, receiver, userId, groupId, restricted, owner);
39        mFingerId = fingerId;
40        mUserIdForRemove = userId;
41    }
42
43    @Override
44    public int start() {
45        IFingerprintDaemon daemon = getFingerprintDaemon();
46        // The fingerprint template ids will be removed when we get confirmation from the HAL
47        try {
48            final int result = daemon.remove(mFingerId, getUserId());
49            if (result != 0) {
50                Slog.w(TAG, "startRemove with id = " + mFingerId + " failed, result=" + result);
51                onError(FingerprintManager.FINGERPRINT_ERROR_HW_UNAVAILABLE);
52                return result;
53            }
54        } catch (RemoteException e) {
55            Slog.e(TAG, "startRemove failed", e);
56        }
57        return 0;
58    }
59
60    @Override
61    public int stop(boolean initiatedByClient) {
62        // We don't actually stop remove, but inform the client that the cancel operation succeeded
63        // so we can start the next operation.
64        if (initiatedByClient) {
65            onError(FingerprintManager.FINGERPRINT_ERROR_CANCELED);
66        }
67        return 0;
68    }
69
70    /*
71     * @return true if we're done.
72     */
73    private boolean sendRemoved(int fingerId, int groupId) {
74        IFingerprintServiceReceiver receiver = getReceiver();
75        if (receiver == null)
76            return true; // client not listening
77        try {
78            receiver.onRemoved(getHalDeviceId(), fingerId, groupId);
79            return fingerId == 0;
80        } catch (RemoteException e) {
81            Slog.w(TAG, "Failed to notify Removed:", e);
82        }
83        return false;
84    }
85
86    @Override
87    public boolean onRemoved(int fingerId, int groupId) {
88        if (fingerId != 0) {
89            if (fingerId != mFingerId)
90            FingerprintUtils.getInstance().removeFingerprintIdForUser(getContext(), fingerId,
91                    mUserIdForRemove);
92        } else {
93            mUserIdForRemove = UserHandle.USER_NULL;
94        }
95        return sendRemoved(fingerId, getGroupId());
96    }
97
98    @Override
99    public boolean onEnrollResult(int fingerId, int groupId, int rem) {
100        if (DEBUG) Slog.w(TAG, "onEnrollResult() called for remove!");
101        return true; // Invalid for Remove
102    }
103
104    @Override
105    public boolean onAuthenticated(int fingerId, int groupId) {
106        if (DEBUG) Slog.w(TAG, "onAuthenticated() called for remove!");
107        return true; // Invalid for Remove.
108    }
109
110    @Override
111    public boolean onEnumerationResult(int fingerId, int groupId) {
112        if (DEBUG) Slog.w(TAG, "onEnumerationResult() called for remove!");
113        return false; // Invalid for Remove.
114    }
115
116
117}
118