internal object GetValue(T value, string propertyName)
{
var getter = Getters.GetOrAdd(propertyName, name =>
{
var propertyInfo = GetType().GetProperty(name);
return(ResolveGetter(propertyInfo));
});
return(getter.Invoke(value));
}
private object BindParameter(DisplayContext displayContext, ParameterInfo parameter, TextWriter output)
{
if (parameter.Name == "Shape")
{
return(displayContext.Value);
}
if (parameter.Name == "Display")
{
return(displayContext.Display);
}
if (parameter.Name == "Output" && parameter.ParameterType == typeof(TextWriter))
{
return(output);
}
if (parameter.Name == "Output" && parameter.ParameterType == typeof(Action <object>))
{
return(new Action <object>(output.Write));
}
if (parameter.Name == "Html")
{
return(new HtmlHelper(
displayContext.ViewContext,
displayContext.ViewDataContainer,
_routeCollection));
}
if (parameter.Name == "Url" && parameter.ParameterType.IsAssignableFrom(typeof(UrlHelper)))
{
return(new UrlHelper(displayContext.ViewContext.RequestContext, _routeCollection));
}
var getter = Getters.GetOrAdd(parameter.Name, n =>
CallSite <Func <CallSite, object, dynamic> > .Create(
Microsoft.CSharp.RuntimeBinder.Binder.GetMember(
CSharpBinderFlags.None, n, null, new[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) })));
var result = getter.Target(getter, displayContext.Value);
if (result == null)
{
return(null);
}
var converter = Converters.GetOrAdd(parameter.ParameterType, CompileConverter);
var argument = converter.Invoke(result);
return(argument);
}
static (PropertyModification, PropertyModification) GetModificationsOrNull(Type type, string property, object previousValue, object newValue)
{
var getter = Getters
.GetOrAdd(type, _ => new ConcurrentDictionary <string, Func <object, object, (PropertyModification, PropertyModification)> >())
.GetOrAdd(property, _ => CreateModificationGetter(type, property));
try
{
return(getter(previousValue, newValue));
}
catch (Exception exception)
{
throw new ArgumentException($"Could not generate property modifications for the '{property}' property of {type}, value changed from {previousValue} to {newValue}", exception);
}
}