Pass parameter in Bundle

Question

My application uses message internationalization, etc. I would like to know how to pass parameters when passing a key that will fetch a value in the file .properties. Ex:

My crud screens will always display a success message when a new registration is made. The default message would be: Produdo cadastrado(a) com sucesso!. The word Product can vary already the rest can be fixed. So in my file . properties is like this:

pruduto=Produto
cadastro.sucesso= {0} cadastrado(a) com sucesso!

Meaning there will always come some value before the key cadastro.sucesso. Currently my code is like this:

package br.com.pokemax.util;

import java.util.Locale;
import java.util.ResourceBundle;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;

public class MensagensUtil {

    private final static ResourceBundle BUNDLE = ResourceBundle.getBundle("properties.mensagens", new Locale("pt"));;

    public static String recupera(String chave) {
        return BUNDLE.getString(chave);
    }

    public static void sucesso(String mensagem) {

        FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_INFO, recupera(mensagem), "");
        FacesContext.getCurrentInstance().addMessage("messagePanel", msg);
    }

    public static void erro(String mensagem) {

        FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_ERROR, recupera(mensagem), "");
        FacesContext.getCurrentInstance().addMessage("messagePanel", msg);
    }

    public static void alerta(String mensagem) {

        FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_WARN, recupera(mensagem), "");
        FacesContext.getCurrentInstance().addMessage("messagePanel", msg);
    }

}

In this situation I need to pass a key only, etc. How can I accept to pass parameters ?

Answer 1

You will use the function String format. for that reason. For example instead of using:

public static void sucesso(String mensagem) {

        FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_INFO, recupera(mensagem), "");
        FacesContext.getCurrentInstance().addMessage("messagePanel", msg);
    }

You will write like this:

public static void sucesso(String mensagem, Object... parametros) {

        FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_INFO, String.format(recupera(mensagem), parametros), "");
        FacesContext.getCurrentInstance().addMessage("messagePanel", msg);
    }

Just one more tip, you are repeating a lot of code in this class, see that the methods success, error and alert do almost the same thing, only changing the level of severity. You could have a private method that these methods would call, plus just the level.