/// <summary>
/// Invokes proxy methods which return a value.
/// </summary>
/// <typeparam name="T">The return type of the method being invoked.</typeparam>
/// <param name="args">The arguments to pass to the method.</param>
/// <returns>The return value of the default proxy method.</returns>
/// <remarks>This method will invoke methods on all of the proxy objects, but will return
/// the result of the invocation on the default object.
/// </remarks>
protected T ProxyInvoke <T>(params object[] args)
{
if (objects.Count == 0)
{
return(default(T));
}
StackTrace trace = new StackTrace();
StackFrame frame = trace.GetFrame(1);
MethodInfo method = frame.GetMethod() as MethodInfo;
ProxyAttributeCollection attributes = GetAttributes(method);
bool first = true;
T result = default(T);
foreach (object invoke in objects)
{
ProxyTypeBindingAttribute binding = attributes.GetTypeBinding(invoke);
MemberInfoAccessor accessor = binding.GetTargetAccessor(typeof(T), args);
if (first)
{
result = (T)accessor.Get(invoke, args);
first = false;
}
else
{
accessor.Get(invoke, args);
}
}
return(result);
}
/// <summary>
/// Adds a binding that relates a type with a <see cref="ProxyTypeBindingAttribute"/>.
/// </summary>
/// <param name="attribute">The attributes that govern the invocation of methods on objects of a certain type.</param>
public void AddTypeBinding(ProxyTypeBindingAttribute attribute)
{
try
{
this.typeBindings.Add(attribute.Type, attribute);
}
catch (ArgumentException)
{
throw new ProxyAttributeReflectionException();
}
}
/// <summary>
/// Adds a binding that relates a type with a <see cref="ProxyTypeBindingAttribute"/>.
/// </summary>
/// <param name="attribute">The attributes that govern the invocation of methods on objects of a certain type.</param>
public void AddTypeBinding(ProxyTypeBindingAttribute attribute)
{
try
{
this.typeBindings.Add(attribute.Type, attribute);
}
catch (ArgumentException)
{
throw new ProxyAttributeReflectionException();
}
}
/// <summary>
/// Performs the get operation on the first object in the list of proxy objects (the default object).
/// </summary>
/// <typeparam name="T">The type to cast the return value as.</typeparam>
/// <param name="args">The indices to pass to the get method.</param>
/// <returns>The result of executing a get operation on the default proxy object, or the default value of T
/// if there are no proxy objects.
/// </returns>
public T ProxyGet <T>(params object[] args)
{
if (objects.Count == 0)
{
return(default(T));
}
StackTrace trace = new StackTrace();
StackFrame frame = trace.GetFrame(1);
MethodInfo method = frame.GetMethod() as MethodInfo;
ProxyAttributeCollection attributes = GetAttributes(method);
ProxyTypeBindingAttribute binding = attributes.GetTypeBinding(objects[0]);
MemberInfoAccessor accessor = binding.GetTargetAccessor(typeof(T), args);
return((T)accessor.Get(objects[0], args));
}
/// <summary>
/// Invokes proxy methods which do not return a value.
/// </summary>
/// <param name="args">The arguments to pass to the method.</param>
protected void ProxyInvoke(params object[] args)
{
if (objects.Count == 0)
{
return;
}
StackTrace trace = new StackTrace();
StackFrame frame = trace.GetFrame(1);
MethodInfo method = frame.GetMethod() as MethodInfo;
ProxyAttributeCollection attributes = GetAttributes(method);
foreach (object invoke in objects)
{
ProxyTypeBindingAttribute binding = attributes.GetTypeBinding(invoke);
MemberInfoAccessor accessor = binding.GetTargetAccessor(typeof(void), args);
accessor.Get(invoke, args);
}
}
/// <summary>
/// Performs the set operation on all proxy objects.
/// </summary>
/// <param name="value">The value to set on the proxy objects.</param>
/// <param name="args">The indices of the set operation.</param>
protected void ProxySet(object value, params object[] args)
{
if (objects.Count == 0)
{
return;
}
StackTrace trace = new StackTrace();
StackFrame frame = trace.GetFrame(1);
MethodInfo method = frame.GetMethod() as MethodInfo;
ProxyAttributeCollection attributes = GetAttributes(method);
foreach (object invoke in objects)
{
ProxyTypeBindingAttribute binding = attributes.GetTypeBinding(invoke);
object[] argsWithValue = new object[args.Length + 1];
argsWithValue[0] = value;
Array.Copy(args, 0, argsWithValue, 1, args.Length);
MemberInfoAccessor accessor = binding.GetTargetAccessor(typeof(void), argsWithValue);
accessor.Set(invoke, value, args);
}
}
