Hi,
Thanks for a great project. In one of my cases I use dynamic proxy to
generate implementation of interface aggregating other interfaces where
each of these other interfaces has its own implementation, so aggregate
interface implementation is just based on composition of other interface
implementations. Surely it could be just implemented by hand but using
dynamic proxy saves me work when something is added to these particular
interfaces. So I made interceptor like below. My question is, is there
perhaps some built-in mechanism for these kind of scenario and if not, is
there any reason for that (like do you see some risk in code like below
[except for TODO comment part] )?
public class MultiTargetInterceptor : IInterceptor
{
object[] targets;
Dictionary<object, IEnumerable<MethodInfo>> methodCache;
public MultiTargetInterceptor(params object[] targets)
{
this.targets = targets;
this.methodCache = new Dictionary<object,
IEnumerable<MethodInfo>>();
foreach (var t in this.targets)
{
var type = t.GetType();
var allMethods =
type.GetMethods().Union(type.GetInterfaces().SelectMany(x =>
x.GetMethods()));
methodCache.Add(t, allMethods);
}
}
public void Intercept(IInvocation invocation)
{
object result;
MethodInfo method = invocation.Method;
if (invocation.Method.IsGenericMethod)
method = invocation.Method.GetGenericMethodDefinition();
var target = methodCache.Single(x =>
x.Value.Contains(method)).Key; //TODO: explicit interface implementation
support
result = invocation.GetConcreteMethod().Invoke(target,
invocation.Arguments);
if (invocation.Method.ReturnType != typeof(void))
invocation.ReturnValue = result;
}
}
Thanks in advance,
Milosz
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