Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package br.ufac.sion.converter; import br.ufac.sion.dao.EstadoFacadeLocal; import br.ufac.sion.model.Estado; import java.util.logging.Level; import java.util.logging.Logger; import javax.faces.component.UIComponent; import javax.faces.context.FacesContext; import javax.faces.convert.Converter; import javax.faces.convert.FacesConverter; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import org.apache.commons.lang3.StringUtils; /** * * @author rennan.lima */ @FacesConverter(forClass = Estado.class) public class EstadoConverter implements Converter { private EstadoFacadeLocal estadoFacade; public EstadoConverter() { this.estadoFacade = lookupEstadoFacadeLocal(); } @Override public Object getAsObject(FacesContext context, UIComponent component, String value) { if (StringUtils.isBlank(value)) { return null; } return this.estadoFacade.findById(new Long(value)); } @Override public String getAsString(FacesContext context, UIComponent component, Object value) { if (value != null) { Long codigo = ((Estado) value).getId(); String retorno = (codigo == null ? null : codigo.toString()); return retorno; } return ""; } private EstadoFacadeLocal lookupEstadoFacadeLocal() { try { Context c = new InitialContext(); return (EstadoFacadeLocal) c.lookup("java:global/sion-ear/sion-ejb-2.0/EstadoFacade"); } catch (NamingException ne) { Logger.getLogger(getClass().getName()).log(Level.SEVERE, "exception caught", ne); throw new RuntimeException(ne); } } }