[FIXED] unidirectional bind and set with conversion in JavaFX

Issue

I recently wrote function like this in my JavaFX application:

public static <T1, T2> void bindAndSet(ReadOnlyProperty<T1> sourceProperty, Property<T2> targetProperty, Function<T1, T2> converter) {
    sourceProperty.addListener(new WeakChangeListener<>((obs, oldVal, newVal) -> targetProperty.setValue(converter.apply(newVal))));
    targetProperty.setValue(converter.apply(sourceProperty.getValue()));
}

This is unidirectional bind with transformation and setting initial value. I have small experience in JavaFX but it seems like it should be quite common part of an application that uses binding. Property#bind seems nearly useless. It does not allow converting types and from checking source code it does not set initial value.

Is there a method (or 2) that provide such functionality? Or maybe I am using JavaFX API in a wrong way?

Solution

You can use Bindings.createObjectBinding():

targetProperty.bind(Bindings.createObjectBinding(
        () -> converter.apply(sourceProperty.get()), sourceProperty));

Answered By - Oboe
Answer Checked By - Clifford M. (JavaFixing Volunteer)