javax.faces.convert.EnumConverter.getAsString null value problem

public java.lang.String getAsString(FacesContext context, UIComponent component, java.lang.Object value)

Parameters: context - FacesContext for the request being processed component - UIComponent with which this model object value is associated value - Model object value to be converted (may be null)

Returns: a zero-length String if value is null, otherwise the result of the conversion

Currently we return null if the value is null rather than a zero-length String ("")