private async Task <IAssemblyMetadata> LoadRootAssembly(string target)
{
if (IsTracingEnabled)
{
Tracer.LogLoadingModel(target);
Tracer.Flush();
}
AssemblyMetadata graph = null;
try
{
graph = await AssemblyMetadata.Load(Persister, target);
}
catch (Exception e)
{
string errorMessage = $"Error during retrieval of elements from repository. {e.Message}";
ErrorMessageTarget.SendMessage("Loading error", errorMessage);
if (IsTracingEnabled)
{
Tracer.LogFailure($"{target}; {errorMessage}");
Tracer.Flush();
}
return(null);
}
finally
{
Persister.Dispose();
}
return(graph);
}
private async Task Save(ISourceProvider targetPathProvider)
{
if (targetPathProvider == null)
{
throw new ArgumentNullException(nameof(targetPathProvider), "SourceProvider can't be null.");
}
if (Persister.FileSystemDependency == FileSystemDependency.Independent)
{
targetPathProvider = new NullSourceProvider();
}
if (targetPathProvider.GetAccess())
{
try
{
string target = targetPathProvider.GetPath();
await Task.Run(async() =>
{
if (IsTracingEnabled)
{
Tracer.LogSavingModel(target);
Tracer.Flush();
}
Persister.Access(target);
await(ObjectsList?.FirstOrDefault().ModelObject as AssemblyMetadata)?.Save(Persister, target);
Persister.Dispose();
InformationMessageTarget.SendMessage("Saving completed", "Model was successfully saved.");
if (IsTracingEnabled)
{
Tracer.LogModelSaved(target);
Tracer.Flush();
}
});
}
catch (Exception ex)
{
ErrorMessageTarget.SendMessage("Saving error", ex.Message);
if (IsTracingEnabled)
{
Tracer.LogFailure(
$"Exception caught when trying to open a file for writing {Environment.NewLine}{ex.Message}");
Tracer.Flush();
}
}
}
}
private void ImportTracer()
{
tracingProvider = new TracingProvider(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
try
{
if (Tracer is null)
{
Tracer = tracingProvider.ProvideTracer();
}
}
catch (MEFLoaderException ex)
{
ErrorMessageTarget.SendMessage("MEF composition error", ex.Message);
ErrorMessageTarget.CloseApp();
IsTracingEnabled = false;
}
}
private void LoadAssembly()
{
if (IsTracingEnabled)
{
Tracer.LogLoadingModel(LoadedAssembly);
Tracer.Flush();
}
try
{
Reflector reflector = new Reflector(LoadedAssembly);
LoadedAssemblyRepresentation = reflector.AssemblyModel;
if (IsTracingEnabled)
{
Tracer.LogModelLoaded(LoadedAssembly);
Tracer.Flush();
}
}
catch (BadImageFormatException ex)
{
if (IsTracingEnabled)
{
Tracer.LogFailure($"Failed when reading assembly {ex.Message}");
Tracer.Flush();
}
ErrorMessageTarget.SendMessage("Assembly reading error", ex.Message);
LoadedAssemblyRepresentation = null;
} catch (Exception ex)
{
if (IsTracingEnabled)
{
Tracer.LogFailure($"Failed when reading assembly {ex.Message}");
Tracer.Flush();
}
ErrorMessageTarget.SendMessage("Unknown assembly reading error", ex.Message);
LoadedAssemblyRepresentation = null;
}
}
private void ImportPersister()
{
persistenceProvider = new PersistenceProvider(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
try
{
if (Persister is null)
{
Persister = persistenceProvider.ProvidePersister();
}
}
catch (MEFLoaderException ex)
{
if (IsTracingEnabled)
{
Tracer.LogFailure("Persister loading failure. " +
$"{ex.Message} {ex.StackTrace} " +
$"{ex.InnerException?.Message} {ex.InnerException?.StackTrace}");
}
ErrorMessageTarget.SendMessage("MEF composition error", ex.Message);
ErrorMessageTarget.CloseApp();
}
}
private async Task Load(ISourceProvider targetPathProvider)
{
if (targetPathProvider == null)
{
throw new ArgumentNullException(nameof(targetPathProvider), "SourceProvider can't be null.");
}
if (Persister.FileSystemDependency == FileSystemDependency.Independent)
{
targetPathProvider = new NullSourceProvider();
}
if (targetPathProvider.GetAccess())
{
try
{
string target = targetPathProvider.GetPath();
IAssemblyMetadata result = await Task.Run(
async() => await LoadRootAssembly(target));
if (result is null)
{
const string errorMessage = "Repository doesn't contain any elements";
ErrorMessageTarget.SendMessage("Loading error", errorMessage);
if (IsTracingEnabled)
{
Tracer.LogFailure($"{target}; {errorMessage}");
Tracer.Flush();
}
}
else
{
ObjectsList.Clear();
ObjectsList.Add(new AssemblyItem(result as AssemblyMetadata));
LoadedAssembly = "Model deserialized";
SaveModel.RaiseCanExecuteChanged();
InformationMessageTarget?.SendMessage("Loading completed", "Model was successfully loaded.");
if (IsTracingEnabled)
{
Tracer.LogModelLoaded(target);
Tracer.Flush();
}
}
}
catch (Exception ex)
{
ErrorMessageTarget.SendMessage("Loading error", ex.Message);
if (IsTracingEnabled)
{
Tracer.LogFailure(
$"Exception caught when trying to open a file for reading {Environment.NewLine}{ex.Message}");
Tracer.Flush();
}
}
}
else
{
ErrorMessageTarget.SendMessage("Target in use", "File you tried to open is currently in use by another program");
}
}