/// <summary>
/// Function to load the file system provider plug ins.
/// </summary>
/// <param name="pluginCache">The MEF plug in cache used to load the file system plug ins.</param>
/// <param name="pluginDir">The plug in directory.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="pluginCache"/>, or the <paramref name="pluginDir"/> parameter is <b>null</b>.</exception>
public void LoadProviders(GorgonMefPlugInCache pluginCache, DirectoryInfo pluginDir)
{
if (pluginCache == null)
{
throw new ArgumentNullException(nameof(pluginCache));
}
if (pluginDir == null)
{
throw new ArgumentNullException(nameof(pluginDir));
}
IReadOnlyList <PlugInAssemblyState> assemblies = pluginCache.ValidateAndLoadAssemblies(pluginDir.GetFiles("*.dll"), Program.Log);
if (assemblies.Count > 0)
{
foreach (PlugInAssemblyState record in assemblies.Where(item => !item.IsAssemblyLoaded && item.IsManaged))
{
_disabled[Path.GetFileName(record.Path)] = new DisabledPlugIn(DisabledReasonCode.Error, Path.GetFileName(record.Path), record.LoadFailureReason, record.Path);
}
}
IGorgonPlugInService plugins = new GorgonMefPlugInService(pluginCache);
IReadOnlyList <GorgonFileSystemProvider> readers = plugins.GetPlugIns <GorgonFileSystemProvider>();
IReadOnlyList <FileWriterPlugIn> writers = plugins.GetPlugIns <FileWriterPlugIn>();
// Get readers.
foreach (IGorgonFileSystemProvider reader in readers)
{
try
{
Program.Log.Print($"Creating file system reader plug in '{reader.Name}'...", LoggingLevel.Simple);
_readers[reader.Name] = reader;
}
catch (Exception ex)
{
Program.Log.Print($"ERROR: Cannot create file system reader plug in '{reader.Name}'.", LoggingLevel.Simple);
Program.Log.LogException(ex);
_disabled[reader.Name] = new DisabledPlugIn(DisabledReasonCode.Error, reader.Name, string.Format(Resources.GOREDIT_DISABLE_FILE_PROVIDER_EXCEPTION, ex.Message), reader.ProviderPath);
}
}
// Get writers
foreach (FileWriterPlugIn writer in writers)
{
IReadOnlyList <string> disabled = writer.IsPlugInAvailable();
try
{
Program.Log.Print($"Creating file system writer plug in '{writer.Name}'...", LoggingLevel.Simple);
if (disabled.Count != 0)
{
Program.Log.Print($"WARNING: The file system writer plug in '{writer.Name}' is disabled:", LoggingLevel.Simple);
foreach (string reason in disabled)
{
Program.Log.Print($"WARNING: {reason}", LoggingLevel.Verbose);
}
_disabled[writer.Name] = new DisabledPlugIn(DisabledReasonCode.ValidationError, writer.Name, string.Join("\n", disabled), writer.PlugInPath);
continue;
}
writer.AssignCommonServices(_commonServices);
_writers[writer.GetType().FullName] = writer;
}
catch (Exception ex)
{
Program.Log.Print($"ERROR: Cannot create file system writer plug in '{writer.Name}'.", LoggingLevel.Simple);
Program.Log.LogException(ex);
_disabled[writer.Name] = new DisabledPlugIn(DisabledReasonCode.Error, writer.Name, string.Format(Resources.GOREDIT_DISABLE_FILE_PROVIDER_EXCEPTION, ex.Message), writer.PlugInPath);
}
}
}
