HEH. Solution in Ruby

[enebo]

Sorry I was on multiple machines and I turned off the one I was working on before I realized I could have submitted a PR (and you were not on IRC):

java_import Java::javafx.beans.binding.StringBinding

class RubyStringBinding < StringBinding
  def initialize(property:, method:)
    super()
    @property, @method = property, method
    bind @property
  end

  def computeValue
    property_value = @property.get
    return unless property_value
    property_value.__send__ @method
  end
end

So this works fine and you adapter this pattern for all basic types of Binding (although to be honest with type erasure you can probably use this class for any Java type since they all end up as Object).

[enebo]

Added jruby/jrubyfx#112 on making this more general and adding it to jrubyfx. Thanks for bringing this to our attention.

[stergiom]

Worked like a charm 🍀