protected void AddSupportedFlavor(FilterFlavor flavor)
{
// Add flavor only when called from RegisterSupportedTypes
if (supported_flavors == null)
{
throw new Exception("AddSupportedFlavor() should be only called from RegisterSupportedTypes()");
}
supported_flavors.Add(flavor);
}
// flav [larger wt] < flav [smaller wt]
// for same wt, use hashcode (never return obj1 == obj2 unless they are actually same)
public int Compare(object obj1, object obj2)
{
FilterFlavor flav1 = (FilterFlavor)obj1;
FilterFlavor flav2 = (FilterFlavor)obj2;
int ret = flav2.Weight.CompareTo(flav1.Weight);
if (ret != 0)
{
return(ret);
}
else
{
return(obj1.GetHashCode() - obj2.GetHashCode());
}
}
/////////////////////////////////////////////////////////////////////////
static private ICollection CreateFilters(Uri uri, string extension, string mime_type)
{
SortedList matched_filters_by_flavor = FilterFlavor.NewHashtable();
foreach (FilterFlavor flavor in FilterFlavor.Flavors)
{
if (flavor.IsMatch(uri, extension, mime_type))
{
Filter matched_filter = null;
try {
matched_filter = (Filter)Activator.CreateInstance((Type)FilterFlavor.FilterTable [flavor]);
if (flavor.MimeType != null)
{
matched_filter.MimeType = flavor.MimeType;
}
if (flavor.Extension != null)
{
matched_filter.Extension = flavor.Extension;
}
} catch (Exception e) {
continue;
}
matched_filters_by_flavor [flavor] = matched_filter;
}
}
if (Debug)
{
foreach (DictionaryEntry entry in matched_filters_by_flavor)
{
FilterFlavor flav = (FilterFlavor)entry.Key;
Filter filter = (Filter)entry.Value;
Logger.Log.Debug("Found matching filter: {0}, Weight: {1}", filter, flav.Weight);
}
}
return(matched_filters_by_flavor.Values);
}