IEnumerable <AspectInstance> IAspectProvider.ProvideAspects(object targetElement)
{
var targetType = (Type)targetElement;
foreach (var location in targetType.GetFields(BindingFlags.Instance | BindingFlags.Public).Union(
targetType.GetProperties(BindingFlags.Instance | BindingFlags.Public).Cast <MemberInfo>()))
{
if (location.IsDefined(typeof(RequiresPermissionBaseAttribute), true))
{
continue;
}
var aspect = new LocationAuthorizationAspect();
aspect.AddPermission(0, permissionFactory);
yield return(new AspectInstance(location, aspect));
}
}
/// <summary>
/// Invoked at build time to get the list of aspects required to implement the current custom attribute.
/// </summary>
/// <param name="targetElement">Declaration on which the attribute has been applied.</param>
/// <returns>A collection of aspect instances.</returns>
public virtual IEnumerable <AspectInstance> ProvideAspects(object targetElement)
{
var aspectRepositoryService =
PostSharpEnvironment.CurrentProject.GetService <IAspectRepositoryService>();
var aspects = aspectRepositoryService.GetAspectInstances(targetElement) ?? new IAspectInstance[0];
var aspect = (AuthorizationAspect)aspects.Select(i => i.Aspect).SingleOrDefault(i => i is AuthorizationAspect);
if (aspect == null)
{
if (targetElement is MethodBase)
{
aspect = new MethodAuthorizationAspect();
}
else if (targetElement is PropertyInfo || targetElement is FieldInfo)
{
aspect = new LocationAuthorizationAspect();
}
else if (targetElement is ParameterInfo)
{
aspect = new MethodAuthorizationAspect();
}
else
{
throw new Exception($"Unexpected aspect target: {targetElement.GetType().Name}");
}
yield return(new AspectInstance(targetElement, aspect));
}
var parameterIndex = 0;
if (targetElement is ParameterInfo parameterInfo)
{
parameterIndex = parameterInfo.Position + 1;
}
aspect.AddPermission(parameterIndex, this);
}