Actor filtering

Hi guys!

As a newbie, I'm trying to configure an actor filter operation on Bonita 6.2.1 and I stoped at the Implementation step of configuration.

I've created the Definition, with a two input parameters, which one of them will be mapped to a process variable of string type. There is a organization group where his "Exibition Name" should match the value on this variable. I have created the wizard page of the filter definition where user must map the variable to the input parameter above. See bellow the Organization Manager form print.

I am trying to finish the class code for filter method of the implementation and at this point any help would be great.