DefaultMenuItem with a value from a .properties file (resource bundle)

问题

Ok so I'm trying to move my project from Primefaces 3.5 to 4.0 and I'm struggling with the new MenuModel API. I'm sure it's something stupid, but I can't display a DefaultMenuItem for my Breadcrumb where the value is from a .properties file (defined in faces-config as resource bundle).

What I had with Primefaces 3.5 :

        MenuItem menuItem;

        // Where "getPath()" returns all the pages needed to get to the current one
        for (Page page : currentPage.getPath()) {
            menuItem = new MenuItem();
            // Where "getTitle()" returns something like "#{message.home}" which will be resolved as "Home"
            menuItem.setValueExpression("value", expressionFactory.createValueExpression(elContext, page.getTitle(), String.class));
            menuItem.setActionExpression(expressionFactory.createMethodExpression(elContext, page.getAction(), String.class, new Class[0]));
            menuItem.setAjax(false);
            menuItem.setAsync(false);
            menuItem.setImmediate(true);
            breadCrumbModel.addMenuItem(menuItem);
        }

What I tried with Primefaces 4.0 and the new DefaultMenuItem object :

menuItem.setValue(page.getTitle());

menuItem.setValue(expressionFactory.createValueExpression(elContext, tmp.getTitle(), String.class));

menuItem.setParam("value", expressionFactory.createValueExpression(elContext, tmp.getTitle(), String.class));

menuItem.setTitle(page.getTitle()); <--- I even tried that in despair haha

I looked up the user guide and the api doc (uncommented :( ) but it doesn't talk much about this scenario, most of the time the examples use plain ol' String. What am I doing wrong ?

Thanks.

回答1:

After having the same issue i found this solution and it works!, i'm using primefaces 5.0:

public void addMiga(String action, String label) throws Exception {
    DefaultMenuItem item = new DefaultMenuItem();
    item.setFragment(label);
    String valueTitulo = "";
    HtmlOutputText seccionLabel = new HtmlOutputText();
    if (label != null && !"".equals(label)) {
        String[] expresiones = label.split(",");
        for (String expresion : expresiones) {
            if (expresion.contains("label_")
                    || expresion.contains("_label")) {
                seccionLabel.setValueExpression("value",
                        getValueExpression(expresion));

            } else {
                seccionLabel.setValue(expresion);
            }
            valueTitulo += " " + (String) seccionLabel.getValue();
        }
    }
    item.setValue(valueTitulo);
    item.setId(Integer.toString(this.migas.getElements().size()));
    item.setOnclick(ConstantesErp.FUNCION_STATUS);
    item.setCommand(action);
    item.setAjax(false);
    this.migas.addElement(item);
}

public static ValueExpression getValueExpression(String nombre) {
        FacesContext fc = FacesContext.getCurrentInstance();
        Application app = fc.getApplication();
        ELContext elContext = fc.getELContext();
        ExpressionFactory factory = app.getExpressionFactory();
        ValueExpression ve = null;
        try {
            ve = factory.createValueExpression(elContext, "#" + "{" + nombre
                    + "}", String.class);
        } catch (Exception e) {
            ve = null;
        }
        return ve;
    }

来源：https://stackoverflow.com/questions/21914562/defaultmenuitem-with-a-value-from-a-properties-file-resource-bundle

标签

jsf-2

primefaces