/// <summary>
/// Performs the operation of the handler.
/// </summary>
/// <param name="input">Input to the method call.</param>
/// <param name="getNext">Delegate used to get the next delegate in the call handler pipeline.</param>
/// <returns>Returns value from the target method, or an <see cref="UnauthorizedAccessException"/>
/// if the call fails the authorization check.</returns>
public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
{
if (input == null) throw new ArgumentNullException("input");
if (getNext == null) throw new ArgumentNullException("getNext");
ReplacementFormatter formatter = new MethodInvocationFormatter(input);
if (!this.AuthorizationProvider.Authorize(Thread.CurrentPrincipal, formatter.Format(OperationName)))
{
UnauthorizedAccessException unauthorizedExeption =
new UnauthorizedAccessException(Resources.AuthorizationFailed);
return input.CreateExceptionMethodReturn(unauthorizedExeption);
}
return getNext().Invoke(input, getNext);
}
private string[] GetInstanceNames(IMethodInvocation input)
{
string formattedInstanceName = new MethodInvocationFormatter(input).Format(instanceName);
if (useTotalCounter)
{
return new string[] { TotalInstanceName, formattedInstanceName };
}
return new string[] { formattedInstanceName };
}
