gistfile1.java

package b;

import java.awt.event.ActionEvent;
import org.codehaus.griffon.runtime.core.AbstractGriffonController;

public class BController extends AbstractGriffonController {
    private BModel model;

    public void setModel(BModel model) {
        this.model = model;
    }

    public void copy(ActionEvent e) {
        model.setOutput(model.getInput());
    }
}

/*
  Groovy equivalent

package b

class BController {
    def model

    def copy = { evt = null ->
        model.output = model.input
    }
}
*/