Using POJO's with SelectOneMenu with Generic Converter

Question

Hello How to use List of POJO\'s with JSF h:selectOneMenu or Primefaces p:selectOneMenu?
I know that there are lot of related questions which s

Answer 1

In h:selectOneMenu it's possible, but yours POJO must implements a interface with a identifier atrribute.

Interface:

public inteface IConvertible {
    public Integer getId();
}

Pojo:

public class POJO implements IConvertible {
    ....
    ....
}

And generic converter:

@SuppressWarnings("unchecked")
public class GenericConverter implements Converter {

    @Override
    public Object getAsObject(FacesContext arg0, UIComponent arg1, String arg2) {
        IConvertible ret = null;
        UIComponent src = arg1;
        if (src != null) {
            List childs = src.getChildren();
            UISelectItems itens = null;
            if (childs != null) {
                for (UIComponent ui : childs) {
                    if (ui instanceof UISelectItems) {
                        itens = (UISelectItems) ui;
                        break;
                    } else if (ui instanceof UISelectItem) {
                        UISelectItem item = (UISelectItem) ui;
                        try {
                            IConvertible val = (IConvertible) item.getItemValue();
                            if (arg2.equals("" + val.getId())) {
                                ret = val;
                                break;
                            }
                        } catch (Exception e) {
                        }
                    }
                }
            }

            if (itens != null) {
                List values = (List) itens.getValue();
                if (values != null) {
                    for (IConvertible val : values) {
                        if (arg2.equals("" + val.getId())) {
                            ret = val;
                            break;
                        }
                    }
                }
            }
        }
        return ret;
    }

    @Override
    public String getAsString(FacesContext arg0, UIComponent arg1, Object arg2) {
        String ret = "";
        if (arg2 != null && arg2 instanceof IConvertible) {
            IConvertible m = (IConvertible) arg2;
            if (m != null) {
                Long id = m.getId();
                if (id != null) {
                    ret = id.toString();
                }
            }
        }
        return ret;
    }
}

JSF page: