/*
* Copyright 2023 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.wear.protolayout.expression.pipeline;
import androidx.collection.SimpleArrayMap;
import androidx.wear.protolayout.expression.pipeline.TimeGateway.TimeCallback;
import java.time.Instant;
import java.util.concurrent.Executor;
/** Utility for time data source. */
class EpochTimePlatformDataSource {
private final Executor mUiExecutor;
private final TimeGateway mGateway;
private final SimpleArrayMap<
DynamicTypeValueReceiverWithPreUpdate<Instant>, TimeCallback>
mConsumerToTimeCallback = new SimpleArrayMap<>();
EpochTimePlatformDataSource(Executor uiExecutor, TimeGateway gateway) {
mUiExecutor = uiExecutor;
mGateway = gateway;
}
public void registerForData(DynamicTypeValueReceiverWithPreUpdate<Instant> consumer) {
TimeCallback timeCallback =
new TimeCallback() {
@Override
public void onPreUpdate() {
consumer.onPreUpdate();
}
@Override
public void onData() {
consumer.onData(Instant.now());
}
};
mGateway.registerForUpdates(mUiExecutor, timeCallback);
mConsumerToTimeCallback.put(consumer, timeCallback);
}
public void unregisterForData(DynamicTypeValueReceiverWithPreUpdate<Instant> consumer) {
TimeCallback timeCallback = mConsumerToTimeCallback.remove(consumer);
if (timeCallback != null) {
mGateway.unregisterForUpdates(timeCallback);
}
}
}