/// <summary>
/// Reads filter settings for <see cref="BaseNavigationInitializer"/> derived classes from plugin.xml.
/// </summary>
protected void BuildFilters()
{
if (_tracker != null)
{
return;
}
_tracker = new FixedItemStateTracker("BaseNavigationInitializer - Media navigation filter registration");
IPluginManager pluginManager = ServiceRegistration.Get <IPluginManager>();
foreach (PluginItemMetadata itemMetadata in pluginManager.GetAllPluginItemMetadata(MediaNavigationFilterBuilder.MEDIA_FILTERS_PATH))
{
try
{
MediaNavigationFilter navigationFilter = pluginManager.RequestPluginItem <MediaNavigationFilter>(
MediaNavigationFilterBuilder.MEDIA_FILTERS_PATH, itemMetadata.Id, _tracker);
if (navigationFilter == null)
{
ServiceRegistration.Get <ILogger>().Warn("Could not instantiate Media navigation filter with id '{0}'", itemMetadata.Id);
}
else
{
string extensionClass = navigationFilter.ClassName;
if (extensionClass == null)
{
throw new PluginInvalidStateException("Could not find class type for Media navigation filter {0}", navigationFilter.ClassName);
}
if (extensionClass != GetType().Name)
{
continue;
}
_filters.Add(navigationFilter.Filter);
}
}
catch (PluginInvalidStateException e)
{
ServiceRegistration.Get <ILogger>().Warn("Cannot add Media navigation filter with id '{0}'", e, itemMetadata.Id);
}
}
if (_filters.Count == 0)
{
_filter = null;
return;
}
_filter = _filters.Count == 1 ?
// Single filter
_filters[0] :
// Or a "AND" combined filter
new BooleanCombinationFilter(BooleanOperator.And, _filters);
}
private void InitNavigationFilters()
{
if (_tracker != null)
{
return;
}
_tracker = new FixedItemStateTracker("MediaListProvider - Media navigation filter registration");
_navigationFilters = new Dictionary <string, IList <IFilter> >();
IPluginManager pluginManager = ServiceRegistration.Get <IPluginManager>();
foreach (PluginItemMetadata itemMetadata in pluginManager.GetAllPluginItemMetadata(MediaNavigationFilterBuilder.MEDIA_FILTERS_PATH))
{
try
{
MediaNavigationFilter navigationFilter = pluginManager.RequestPluginItem <MediaNavigationFilter>(
MediaNavigationFilterBuilder.MEDIA_FILTERS_PATH, itemMetadata.Id, _tracker);
if (navigationFilter == null)
{
ServiceRegistration.Get <ILogger>().Warn("MediaListProvider: Could not instantiate Media navigation filter with id '{0}'", itemMetadata.Id);
}
else
{
string extensionClass = navigationFilter.ClassName;
if (extensionClass == null)
{
throw new PluginInvalidStateException("MediaListProvider: Could not find class type for Media navigation filter {0}", navigationFilter.ClassName);
}
IList <IFilter> filters;
if (!_navigationFilters.TryGetValue(extensionClass, out filters))
{
_navigationFilters[extensionClass] = filters = new List <IFilter>();
}
filters.Add(navigationFilter.Filter);
}
}
catch (PluginInvalidStateException e)
{
ServiceRegistration.Get <ILogger>().Warn("MediaListProvider: Cannot add Media navigation filter with id '{0}'", e, itemMetadata.Id);
}
}
}
