InstantNodes.java
/*
* 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.annotation.Nullable;
import androidx.annotation.UiThread;
import androidx.wear.protolayout.expression.DynamicBuilders;
import androidx.wear.protolayout.expression.proto.DynamicProto;
import androidx.wear.protolayout.expression.proto.FixedProto.FixedInstant;
import java.time.Instant;
/** Dynamic data nodes which yield instants. */
class InstantNodes {
private InstantNodes() {}
/** Dynamic instant node that has a fixed value. */
static class FixedInstantNode implements DynamicDataSourceNode<Integer> {
private final Instant mValue;
private final DynamicTypeValueReceiverWithPreUpdate<Instant> mDownstream;
FixedInstantNode(
FixedInstant protoNode, DynamicTypeValueReceiverWithPreUpdate<Instant> downstream) {
this.mValue = Instant.ofEpochSecond(protoNode.getEpochSeconds());
this.mDownstream = downstream;
}
@Override
@UiThread
public void preInit() {
mDownstream.onPreUpdate();
}
@Override
@UiThread
public void init() {
mDownstream.onData(mValue);
}
@Override
public void destroy() {}
}
/** Dynamic Instant node that gets value from the platform source. */
static class PlatformTimeSourceNode implements DynamicDataSourceNode<Integer> {
@Nullable private final EpochTimePlatformDataSource mEpochTimePlatformDataSource;
private final DynamicTypeValueReceiverWithPreUpdate<Instant> mDownstream;
PlatformTimeSourceNode(
@Nullable EpochTimePlatformDataSource epochTimePlatformDataSource,
DynamicTypeValueReceiverWithPreUpdate<Instant> downstream) {
this.mEpochTimePlatformDataSource = epochTimePlatformDataSource;
this.mDownstream = downstream;
}
@Override
@UiThread
public void preInit() {
if (mEpochTimePlatformDataSource != null) {
mEpochTimePlatformDataSource.preRegister();
} else {
// If we have epoch time, it will call onPreUpdate when needed. Otherwise, because
// the init() will invalidate the date in downstream, we should call onPreUpdate
// here.
mDownstream.onPreUpdate();
}
}
@Override
@UiThread
public void init() {
if (mEpochTimePlatformDataSource != null) {
mEpochTimePlatformDataSource.registerForData(mDownstream);
} else {
mDownstream.onInvalidated();
}
}
@Override
@UiThread
public void destroy() {
if (mEpochTimePlatformDataSource != null) {
mEpochTimePlatformDataSource.unregisterForData(mDownstream);
}
}
}
/** Dynamic Instant node that gets value from the state. */
static class StateInstantSourceNode extends StateSourceNode<Instant> {
StateInstantSourceNode(
DataStore dataStore,
DynamicProto.StateInstantSource protoNode,
DynamicTypeValueReceiverWithPreUpdate<Instant> downstream) {
super(
dataStore,
StateSourceNode.<DynamicBuilders.DynamicInstant>createKey(
protoNode.getSourceNamespace(), protoNode.getSourceKey()),
se -> Instant.ofEpochSecond(se.getInstantVal().getEpochSeconds()),
downstream);
}
}
}