Visit.java

package br.com.wakim.teste_jsf.util;

import javax.faces.component.UIComponent;
import javax.faces.component.html.HtmlDataTable;
import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.component.visit.VisitResult;
import javax.faces.context.FacesContext;
import javax.faces.validator.FacesValidator;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

@FacesValidator("visitValidator")
public class VisitValidator implements Validator {

	@Override
	public void validate(FacesContext facesContext, UIComponent component, Object value) throws ValidatorException {
		HtmlDataTable dt = (HtmlDataTable) component.findComponent("dt");
		
		VisitContext vc = VisitContext.createVisitContext(facesContext);
		
		dt.visitTree(vc, new VisitCallback() {
			@Override
			public VisitResult visit(VisitContext context, UIComponent target) {
				System.out.println(target.getClientId(context.getFacesContext()) + " : " + target.getId() + " -> " + target + " " + target.getClass());
				return VisitResult.ACCEPT;
			}
		});
	}

}