static IdentifiedObject InnerApplyDiffNew(IdentifiedObject currentState, PropertyModification[] modifications)
{
var type = currentState.GetType();
var accessor = TypeAccessor.Create(type);
var newState = currentState.CloneNew();
// set all non-modified properties
var propertyNames = GetPropertyNames(type).Except(modifications.Select(m => m.Name));
foreach (var property in propertyNames)
{
accessor[newState, property] = accessor[currentState, property];
}
// apply modified properties
foreach (var modification in modifications)
{
var property = modification.Name
?? throw new ArgumentException($@"Tried to get value from modification without a name: {FormatModification(modification)}");
try
{
accessor[newState, property] = modification.Value;
var valuePresenceMember = ValuePresenceMembers.GetOrAdd(type, _ => new ConcurrentDictionary <string, Member>())
.GetOrAdd(property, _ => accessor.GetMembers().FirstOrDefault(m => m.Name == $"{property}Specified"));
if (valuePresenceMember != null)
{
accessor[newState, valuePresenceMember.Name] = !ReferenceEquals(modification.Value, null);
}
}
catch (Exception exception)
{
throw new ApplicationException($"Could not set the value of the '{property}' property on {type} from modification {FormatModification(modification)}", exception);
}
}
return((IdentifiedObject)newState);
}