public static bool TryLoad <T>(FileDescriptor fileName, ProgressReporter progress, out T result, T @default, ObjectSerialiser serialiser)
{
if (!File.Exists(fileName))
{
result = @default;
return(false);
}
try
{
using (FileStream sr = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
if (progress != null)
{
using (ProgressStream ps = new ProgressStream(sr, progress))
{
result = _Deserialise <T>(ps, fileName.Format, serialiser, progress);
}
}
else
{
result = _Deserialise <T>(sr, fileName.Format, serialiser, progress);
}
}
return(true);
}
catch
{
result = @default;
return(false);
}
}
public PathwayToolsReader(string fn, ProgressReporter prog)
{
_fn = fn;
FileStream fs = File.OpenRead(fn);
ProgressStream ps = new ProgressStream(fs, prog);
_sr = new StreamReader(ps);
}
public static T LoadAndResave <T>(FileDescriptor fileName, ProgressReporter prog, ObjectSerialiser serialiser)
where T : new()
{
T result;
if (!TryLoad <T>(fileName, prog, out result, default(T), serialiser))
{
result = new T();
}
Save <T>(fileName, result, null, prog);
return(result);
}
public ProgressStream(Stream stream, ProgressReporter progressHandler)
{
_stream = stream;
_progressHandler = progressHandler;
}
private bool _disposedValue = false; // To detect redundant calls
public ProgSection(ProgressReporter owner)
{
_owner = owner;
}
/// <summary>
/// Creates a ProgressParallelHandler.
/// </summary>
/// <param name="progressReporter">Target to report to</param>
/// <param name="count">How many operations will take place.</param>
public ProgressParallelHandler(ProgressReporter progressReporter, int count)
{
this._progressReporter = progressReporter;
this._count = count;
}
/// <summary>
/// Saves or loads settings depending on the <paramref name="save"/> parameter.
/// When loading for the first time (i.e. if the default value is used) the file will also be saved.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="save"></param>
/// <param name="fileName"></param>
/// <param name="srcDest"></param>
/// <param name="serialiser"></param>
/// <param name="prog"></param>
public static void SaveLoad <T>(bool save, FileDescriptor fileName, ref T srcDest, ObjectSerialiser serialiser, ProgressReporter prog)
{
if (save)
{
Save(fileName, srcDest, serialiser, prog);
}
else
{
T result;
if (TryLoad(fileName, prog, out result, srcDest, serialiser))
{
srcDest = result;
return;
}
if (!File.Exists(fileName))
{
Save(fileName, srcDest, serialiser, prog);
}
}
}
public static T LoadOrDefault <T>(FileDescriptor fileName, T @default, ObjectSerialiser serialiser, ProgressReporter prog)
{
T result;
TryLoad(fileName, prog, out result, @default, serialiser);
return(result);
}
private static T _Deserialise <T>(Stream s, SerialisationFormat format, ObjectSerialiser serialiser, ProgressReporter prog)
{
switch (format)
{
case SerialisationFormat.MSerialiserBinary:
return(MSerialiser.DeserialiseStream <T>(s, ETransmission.Binary, new[] { serialiser }, null));
case SerialisationFormat.MSerialiserText:
return(MSerialiser.DeserialiseStream <T>(s, ETransmission.Text, new[] { serialiser }, null));
case SerialisationFormat.MSerialiserCompactBinary:
return(MSerialiser.DeserialiseStream <T>(s, ETransmission.CompactBinary, new[] { serialiser }, null));
case SerialisationFormat.MSerialiserFastBinary:
return(MSerialiser.DeserialiseStream <T>(s, ETransmission.FastBinary, new[] { serialiser }, null));
case SerialisationFormat.Xml:
var xs = _CreateXmlSerialiser <T>();
return((T)xs.Deserialize(s));
case SerialisationFormat.DataContract:
var dcs = _CreateDataContactSerialiser <T>();
return((T)dcs.ReadObject(s));
case SerialisationFormat.MsnrbfBinary:
var bcs = new BinaryFormatter();
// bcs.Binder = new TypeNameConverter(); - We don't do this anymore, backwards compatibility ends up taking most of the development time.
return((T)bcs.Deserialize(s));
case SerialisationFormat.Ini:
return(IniSerialiser.Deserialise <T>(s));
default:
throw new InvalidOperationException("Invalid switch: " + format);
}
}
private static void _Serialise <T>(T data, Stream s, SerialisationFormat format, ObjectSerialiser serialiser, ProgressReporter prog)
{
switch (format)
{
case SerialisationFormat.MSerialiserBinary:
MSerialiser.SerialiseStream(s, data, ETransmission.Binary, new[] { serialiser }, null);
return;
case SerialisationFormat.MSerialiserText:
MSerialiser.SerialiseStream(s, data, ETransmission.Text, new[] { serialiser }, null);
return;
case SerialisationFormat.MSerialiserCompactBinary:
MSerialiser.SerialiseStream(s, data, ETransmission.CompactBinary, new[] { serialiser }, null);
return;
case SerialisationFormat.MSerialiserFastBinary:
MSerialiser.SerialiseStream(s, data, ETransmission.FastBinary, new[] { serialiser }, null);
return;
case SerialisationFormat.Xml:
var xs = _CreateXmlSerialiser <T>();
xs.Serialize(s, data);
break;
case SerialisationFormat.DataContract:
var dcs = _CreateDataContactSerialiser <T>();
dcs.WriteObject(s, (object)data);
break;
case SerialisationFormat.MsnrbfBinary:
var bcs = new BinaryFormatter();
bcs.Serialize(s, data);
break;
case SerialisationFormat.Ini:
IniSerialiser.Serialise(s, data);
break;
default:
throw new InvalidOperationException("Invalid switch: " + format);
}
}
public static void Save <T>(FileDescriptor fileName, T data, ObjectSerialiser serialiser, ProgressReporter prog)
{
// Because we move files we can write over readonly files, so prevent this here
if (File.Exists(fileName) && new FileInfo(fileName).IsReadOnly)
{
throw new InvalidOperationException($"Will not overwrite file because it is marked as readonly. Filename: {fileName}");
}
// Can't cancel halfway through writing a file
prog.DisableThrowOnCancel();
try
{
// Create backup
// Need to check main settings is initialised because this function is used when loading the main settings themselves
if (MainSettings.Instance != null && MainSettings.Instance.General.AutoBackup)
{
if (File.Exists(fileName))
{
string bakFile = fileName + ".bak";
if (File.Exists(bakFile))
{
File.Delete(bakFile);
}
File.Move(fileName, bakFile);
}
}
if (data == null)
{
// Special case for deleting files
File.Delete(fileName);
return;
}
// Save to a temporary file (in case we get an error we don't want to destroy the original by saving over it with a corrupt copy)
string tempFile = fileName + ".tmp";
try
{
using (Stream sw = new FileStream(tempFile, FileMode.Create, FileAccess.Write))
{
_Serialise <T>(data, sw, fileName.Format, serialiser, prog);
}
}
catch
{
File.Delete(tempFile);
throw;
}
// Move the temp file to the new location
File.Delete(fileName);
File.Move(tempFile, fileName);
}
finally
{
prog.ReenableThrowOnCancel();
}
}
