Method call of OSGi components which implements the same interface

Hi,

I have two OSGI Component classes with implementing the same interface.

Class WordsValidatorImpl implements ContentValidators {

    void validate() {}
}
Class ActivationValidatorImpl implements ContentValidators {
    void validate() {}
}

I need call the validate() method on both the classes. How to do that?

@Reference ContentValidators contentValidators;

If I call contentValidators.validate() only method in one component is getting called, instead of two. 

thanks

Srini