internal PropertyRedirection(PropertyInfo original, PropertyInfo replacement, bool start = false)
{
Original = original;
Replacement = replacement;
if (original.GetMethod != null)
{
if (replacement.GetMethod == null)
{
throw new ArgumentException("A get method must be defined.", nameof(replacement));
}
GetRedirection = new MethodRedirection(original.GetMethod, replacement.GetMethod, start);
}
if (original.SetMethod != null)
{
if (replacement.SetMethod == null)
{
throw new ArgumentException("A set method must be defined.", nameof(replacement));
}
SetRedirection = new MethodRedirection(original.SetMethod, replacement.SetMethod, start);
}
}
internal EventRedirection(EventInfo original, EventInfo replacement, bool start = false)
{
Original = original;
Replacement = replacement;
if (original.AddMethod != null)
{
if (replacement.AddMethod == null)
{
throw new ArgumentException("An add method must be defined.", nameof(replacement));
}
AddRedirection = new MethodRedirection(original.AddMethod, replacement.AddMethod, start);
}
if (original.RemoveMethod != null)
{
if (replacement.RemoveMethod == null)
{
throw new ArgumentException("A remove method must be defined.", nameof(replacement));
}
RemoveRedirection = new MethodRedirection(original.RemoveMethod, replacement.RemoveMethod, start);
}
if (original.RaiseMethod != null)
{
if (replacement.RaiseMethod == null)
{
throw new ArgumentException("A raise method must be defined.", nameof(replacement));
}
RaiseRedirection = new MethodRedirection(original.RaiseMethod, replacement.RaiseMethod, start);
}
}
internal ObservableRedirection(int id, MethodRedirection redirection)
{
UnderlyingRedirection = redirection;
Observers = new List <IObserver <RedirectionContext> >();
Key = id;
ObservingRedirections.Add(id, this);
}
/// <summary>
/// Returns an observable that allows observing the specified <paramref name="method"/>,
/// and hooking its calls, optionally modifying its return type.
/// </summary>
public static ObservableRedirection Observe(MethodBase method)
{
if (method == null)
{
throw new ArgumentNullException(nameof(method));
}
MethodRedirection redirection = CreateDynamicRedirection(method, out int id);
return(new ObservableRedirection(id, redirection));
}