Executing action from inputText

[Julián García]

How can I code a method that executes an action taken as a string from a 
backing bean.
For instance...if i have this navigation case in my config file
<from-view-id>*</from-view-id>
<navigation-case>
                <from-outcome>MY_ACTION</from-outcome>
                <to-view-id>/myPage.jsp</to-view-id>
</navigation-case>

I'd need the method to take "MY_ACTION" as String, ant take me to 
/myPage.jsp

Any Ideas?

Thanks in advance....