FillCallback.java revision e5f9c30688f0277505fb6b50ea385e5df6271ed8 
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 android.service.autofill;
18
19import android.annotation.Nullable;
20import android.app.Activity;
21import android.os.RemoteException;
22
23/**
24 * Handles autofill requests from the {@link AutofillService} into the {@link Activity} being
25 * autofilled.
26 */
27public final class FillCallback {
28    private final IFillCallback mCallback;
29    private final int mRequestId;
30    private boolean mCalled;
31
32    /** @hide */
33    public FillCallback(IFillCallback callback, int requestId) {
34        mCallback = callback;
35        mRequestId = requestId;
36    }
37
38    /**
39     * Notifies the Android System that an
40     * {@link AutofillService#onFillRequest(FillRequest, android.os.CancellationSignal,
41     * FillCallback)} was successfully fulfilled by the service.
42     *
43     * @param response autofill information for that activity, or {@code null} when the activity
44     * cannot be autofilled (for example, if it only contains read-only fields). See
45     * {@link FillResponse} for examples.
46     */
47    public void onSuccess(@Nullable FillResponse response) {
48        assertNotCalled();
49        mCalled = true;
50        try {
51            mCallback.onSuccess(response, mRequestId);
52        } catch (RemoteException e) {
53            e.rethrowAsRuntimeException();
54        }
55    }
56
57    /**
58     * Notifies the Android System that an
59     * {@link AutofillService#onFillRequest(FillRequest, android.os.CancellationSignal,
60     * FillCallback)} could not be fulfilled by the service.
61     *
62     * @param message error message to be displayed to the user.
63     */
64    public void onFailure(@Nullable CharSequence message) {
65        assertNotCalled();
66        mCalled = true;
67        try {
68            mCallback.onFailure(message);
69        } catch (RemoteException e) {
70            e.rethrowAsRuntimeException();
71        }
72    }
73
74    private void assertNotCalled() {
75        if (mCalled) {
76            throw new IllegalStateException("Already called");
77        }
78    }
79}
80