public T GetDefault(Characteristics characteristics, string template = null)
{
template = template ?? DefaultTemplateName;
if (characteristics == null)
{
throw new InvalidOperationException("Can't have a null characteristics; use Characteristics.None");
}
//check for characteristics
if (!CharacteristicsTransitionMethods.ContainsKey(characteristics))
{
throw new Exception($"unknown characteristics:{characteristics}");
}
if (!Defaults.ContainsKey(characteristics))
{
Defaults.Add(characteristics, new Dictionary <string, Lazy <T> >());
}
if (!Defaults[characteristics].ContainsKey(template))
{
//initialize
Func <T> factory = () =>
{
var ret = ObjectFactory.CreateInstance <T>();
if (TemplateManager == null && template != null)
{
throw new NullReferenceException("No template manager was provided");
}
if (template == DefaultTemplateName)
{
TemplateManager?.ApplyTemplate(ret);
}
else
{
TemplateManager?.ApplyTemplate(ret, template);
}
DecorateNewItem(ret);
CharacteristicsTransitionMethods[characteristics](ret);
return(ret);
};
Defaults[characteristics].Add(template, new Lazy <T>(factory));
}
return(Defaults[characteristics][template].Value);
}
public void InitializeCharacteristicsTransition(Func <T, T> defaultFactory, Characteristics characteristics)
{
if (!CharacteristicsTransitionMethods.ContainsKey(characteristics))
{
CharacteristicsTransitionMethods.Add(characteristics, defaultFactory);
}
else
{
throw new Exception($"there is already a default for characteristics:{characteristics}");
}
}
