org.teamapps.databinding.ObservableValue Maven / Gradle / Ivy
/*-
* ========================LICENSE_START=================================
* TeamApps
* ---
* Copyright (C) 2014 - 2023 TeamApps.org
* ---
* 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.
* =========================LICENSE_END==================================
*/
package org.teamapps.databinding;
import org.teamapps.event.Event;
import java.util.Objects;
import java.util.function.Supplier;
public interface ObservableValue {
Event onChanged();
T get();
// ------- utility -------
default boolean valueEquals(T other) {
return Objects.equals(get(), other);
}
default void bindWritingTo(MutableValue mutableValue) {
DataBindings.bindOneWay(this, mutableValue);
}
// default ObservableValue transformed(Function transformation) {
// return DataBindings.createObservableValue(onChanged(), () -> null);
// }
// === static ===
public static ObservableValue fromEmptyEvent(Event changeEvent, Supplier provider) {
return DataBindings.createObservableValueWithEmptyEvent(changeEvent, provider);
}
public static ObservableValue fromEvent(Event changeEvent, Supplier provider) {
return DataBindings.createObservableValue(changeEvent, provider);
}
public static ObservableValue fromCachedEventValues(Event changeEvent) {
return DataBindings.createObservableValue(changeEvent);
}
// static ObservableValue from(Event changeEvent, Supplier provider) {
// return DataBindings.createObservableValue(changeEvent, provider);
// }
}