AlertCallbackDelegateImpl.java
/*
* Copyright 2022 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 androidx.car.app.model;
import static androidx.annotation.RestrictTo.Scope.LIBRARY;
import static java.util.Objects.requireNonNull;
import android.annotation.SuppressLint;
import android.os.RemoteException;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RestrictTo;
import androidx.car.app.IOnDoneCallback;
import androidx.car.app.OnDoneCallback;
import androidx.car.app.annotations.KeepFields;
import androidx.car.app.utils.RemoteUtils;
/**
* Implementation class for {@link AlertCallbackDelegate} to allow IPC for cancel events.
*
*/
@RestrictTo(LIBRARY)
@KeepFields
public class AlertCallbackDelegateImpl implements AlertCallbackDelegate {
@Nullable
private final IAlertCallback mCallback;
@NonNull
@SuppressLint("ExecutorRegistration")
static AlertCallbackDelegate create(@NonNull AlertCallback callback) {
return new AlertCallbackDelegateImpl(callback);
}
private AlertCallbackDelegateImpl(@NonNull AlertCallback callback) {
mCallback = new AlertCallbackStub(callback);
}
/** For serialization. */
private AlertCallbackDelegateImpl() {
mCallback = null;
}
@Override
public void sendCancel(@AlertCallback.Reason int reason, @NonNull OnDoneCallback callback) {
try {
requireNonNull(mCallback).onAlertCancelled(reason,
RemoteUtils.createOnDoneCallbackStub(callback));
} catch (RemoteException e) {
throw new RuntimeException(e);
}
}
@Override
public void sendDismiss(@NonNull OnDoneCallback callback) {
try {
requireNonNull(mCallback)
.onAlertDismissed(RemoteUtils.createOnDoneCallbackStub(callback));
} catch (RemoteException e) {
throw new RuntimeException(e);
}
}
@KeepFields // We need to keep these stub for Bundler serialization logic.
private static class AlertCallbackStub extends IAlertCallback.Stub {
private final AlertCallback mCallback;
AlertCallbackStub(AlertCallback callback) {
mCallback = callback;
}
@Override
public void onAlertCancelled(@AlertCallback.Reason int reason, IOnDoneCallback callback) {
RemoteUtils.dispatchCallFromHost(callback, "onCancel", () -> {
mCallback.onCancel(reason);
return null;
});
}
@Override
public void onAlertDismissed(IOnDoneCallback callback) {
RemoteUtils.dispatchCallFromHost(callback, "onDismiss", () -> {
mCallback.onDismiss();
return null;
});
}
}
}