public static ListBuilder <T, TRef> HasMany <T, TRef>(this Builder <T> builder)
where T : ICollection <TRef>
{
var child = new ListBuilder <T, TRef>();
child.Add = (o, v) => o.Add(v);
builder.Builders.Add(child);
return(child);
}
public ListBuilder <T, TRef> HasMany <TColl, TRef>(Func <T, TColl> get, Action <T, TColl> set = null)
where TColl : class, ICollection <TRef>
{
var builder = new ListBuilder <T, TRef>();
builder.Add = (o, v) =>
{
var list = get(o);
if (list == null)
{
if (set == null)
{
throw new InvalidOperationException("Could not set new collection instance to property");
}
list = Activator.CreateInstance <TColl>();
set(o, list);
}
list.Add(v);
};
Builders.Add(builder);
return(builder);
}