Mate PropertyInjectors - inject into as3 class?

Could you be more specific? There is no difference between the "MXML" class and the class defined in ActionScript, they are just different ways of writing the same thing.

All that is needed to work with injection is a source property that is binding, and a destination property that is public (either public or public instance variables). If these two requirements are met and the compilation of the code should work.

Take a look at the sample application code you can find here: http://code.google.com/p/mate-examples/wiki/DocumentBasedExampleIntro and you will find a ton of injectors that target classes not defined with MXML (note the injectors , intended for classes whose names are indicated in particular in "Model"). You can also find countless examples in the Mate forums .