private IPageElementConstructor <TGroup, TPage> FindConstructor(Type type, IAttributeSet atts)
{
if (atts == null)
{
throw new ArgumentNullException(nameof(atts));
}
IPageElementConstructor <TGroup, TPage> constr = null;
if (atts.Has <ISpecificConstructorAttribute>())
{
var constrType = atts.Get <ISpecificConstructorAttribute>().ConstructorType;
var constrs = m_SpecificConstructors.Where(c => constrType.IsAssignableFrom(c.Key));
if (constrs.Count() == 1)
{
constr = constrs.First().Value;
}
else if (!constrs.Any())
{
throw new ConstructorNotFoundException(type, "Specific constructor is not registered");
}
else
{
throw new ConstructorNotFoundException(type, "Too many constructors registered");
}
}
else
{
if (!m_DefaultConstructors.TryGetValue(type, out constr))
{
constr = m_DefaultConstructors.FirstOrDefault(
t => t.Key.IsAssignableFrom(type)).Value;
if (constr == null)
{
foreach (var specType in SpecialTypes.FindMathingSpecialTypes(type))
{
if (m_SpecialTypeConstructors.TryGetValue(specType, out constr))
{
break;
}
}
}
}
}
if (constr != null)
{
return(constr);
}
else
{
throw new ConstructorNotFoundException(type);
}
}
