StringNodes.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.wear.protolayout.expression.pipeline;
import androidx.annotation.UiThread;
import androidx.wear.protolayout.expression.proto.DynamicProto.StateStringSource;
import androidx.wear.protolayout.expression.proto.FixedProto.FixedString;
/** Dynamic data nodes which yield Strings. */
class StringNodes {
private StringNodes() {}
/** Dynamic string node that has a fixed value. */
static class FixedStringNode implements DynamicDataSourceNode<String> {
private final String mValue;
private final DynamicTypeValueReceiver<String> mDownstream;
FixedStringNode(FixedString protoNode, DynamicTypeValueReceiver<String> downstream) {
this.mValue = protoNode.getValue();
this.mDownstream = downstream;
}
@Override
@UiThread
public void preInit() {
mDownstream.onPreUpdate();
}
@Override
@UiThread
public void init() {
mDownstream.onData(mValue);
}
@Override
@UiThread
public void destroy() {}
}
/** Dynamic string node that gets a value from integer. */
static class Int32FormatNode extends DynamicDataTransformNode<Integer, String> {
Int32FormatNode(NumberFormatter formatter, DynamicTypeValueReceiver<String> downstream) {
super(downstream, formatter::format);
}
}
/** Dynamic string node that gets a value from the other strings. */
static class StringConcatOpNode extends DynamicDataBiTransformNode<String, String, String> {
StringConcatOpNode(DynamicTypeValueReceiver<String> downstream) {
super(downstream, String::concat);
}
}
/** Dynamic string node that gets a value from float. */
static class FloatFormatNode extends DynamicDataTransformNode<Float, String> {
FloatFormatNode(NumberFormatter formatter, DynamicTypeValueReceiver<String> downstream) {
super(downstream, formatter::format);
}
}
/** Dynamic string node that gets a value from the state. */
static class StateStringNode extends StateSourceNode<String> {
StateStringNode(
ObservableStateStore observableStateStore,
StateStringSource protoNode,
DynamicTypeValueReceiver<String> downstream) {
super(
observableStateStore,
protoNode.getSourceKey(),
se -> se.getStringVal().getValue(),
downstream);
}
}
}