java - How to map values of JavaFX observables? -

i have simpleintegerproperty , want derive simpleobjectproperty<color> it.
for imagine mechanism streams , optionals:

simpleintegerproperty intprop; objectproperty<color> colorprop = intprop.map(i -> convertinttocolor(i), c -> convertcolortoint(c)); 

is there built-in or need roll out on own?
it seems odd if there no such thing because looking @ power of bindings gives strong feeling feature should there.

thanks!

unsure if best way, seems work using bindings.createobjectbinding:

@test     public void test() {         simpleintegerproperty simpleintegerproperty = new simpleintegerproperty(1);         objectbinding<color> binding = bindings                 .createobjectbinding(() -> convertocolor(simpleintegerproperty.get()), simpleintegerproperty);         system.out.println(binding.get());         binding.addlistener(new changelistener<color>() {             @override             public void changed(observablevalue<? extends color> observable, color oldvalue, color newvalue) {                 system.out.println(newvalue);             }         });         simpleintegerproperty.set(2);     }      private color convertocolor(int i) {         switch (i) {             case 1:                 return color.red;             case 2:                 return color.blue;         }         return null;     }