Action menu table

I have a table where data is loaded dynamically according to an argument and I created an action as follows:



import java.util.HashSet;
...

@SuppressWarnings( "serial")
public class TablaHardware extends Table implements ValueChangeListener, Action.Handler {

		
	private static final Action ACTUALIZAR = new Action("Actualizar Datos Ahora");
        private static final Action INFORME= new Action("Informe Ahora");
	
	private static final Action[] ACTIONS = new Action[]
 { ACTUALIZAR,INFORME };
	
	public myAplication app;
	public int idActual=-1;

	
	public int getIdActual() {
		return idActual;
	}

	
	public void setIdActual(int idActual) {
		this.idActual = idActual;
	}

	public TablaHardware(myApplication app) {
		this.app = app;
		this.setSizeFull();
		setColumnCollapsingAllowed(true);
		setColumnReorderingAllowed(true);
		setSelectable(true);
		setImmediate(true);
		this.addListener((ValueChangeListener)this);
		this.addActionHandler(this);
		

	

	}
	
	@Override 
	public Action[] getActions(Object target, Object sender) {
	        return ACTIONS;
       }	

	

	public void setChangeContainer(int id) {
		this.setIdActual(id);
		switch (id) 
                ..........................
		

	}	
	
	public void changeDataSourceContainer(){
		this.setChangeContainer(this.getIdActual());
	}


	@Override
	public void handleAction(Action action, Object sender, Object target) {
		  if (action == ACTUALIZAR) {
	            this.changeDataSourceContainer();
	            this.app.show("Los Datos han sido Actualizado");
	           
	        } 

	}

}

when there is data in the table, the action appears, but the action not appear if no data in the table
I always action menu appears independently whether or not data exists in table??