/// <summary>
/// Registers a custom filter that is decorated with CustomFilterAttribute
/// </summary>
/// <param name="t">Type of the filter to register</param>
public void RegisterCustomFilter(Type t)
{
if (t == null)
{
throw new ArgumentNullException("t");
}
object[] customAttrs = t.GetCustomAttributes(typeof(CustomFilterAttribute), false);
if (customAttrs.Length < 1)
{
throw new ArgumentException("Given type is not decorated with CustomFilterAttribute");
}
CustomFilterAttribute attr = customAttrs[0] as CustomFilterAttribute;
if (attr != null)
{
string typeName = t.AssemblyQualifiedName;
if (!typeof(IFilter).IsAssignableFrom(t))
{
LogbusException ex = new LogbusException("Given type does not implement IFilter");
ex.Data.Add("typeName", t);
throw ex;
}
if (_registeredTypes.ContainsKey(attr.Tag))
{
_registeredTypes.Remove(attr.Tag);
}
_registeredTypes.Add(attr.Tag, typeName);
_registeredDescriptions.Add(attr.Tag, attr.Description);
}
}
/// <summary>
/// Scans an assembly for user-defined filters and registers all of them
/// </summary>
/// <param name="assemblyToScan">Assembly that must be scanned for filters</param>
public void ScanAssemblyAndRegister(Assembly assemblyToScan)
{
if (assemblyToScan == null)
{
throw new ArgumentNullException("assemblyToScan");
}
foreach (Type t in assemblyToScan.GetTypes())
{
string typename = t.AssemblyQualifiedName;
object[] customAttrs = t.GetCustomAttributes(typeof(CustomFilterAttribute), false);
if (customAttrs.Length < 1)
{
continue;
}
CustomFilterAttribute attr = customAttrs[0] as CustomFilterAttribute;
if (attr != null)
{
RegisterCustomFilter(attr.Tag, typename, attr.Description);
}
}
}
