private CyclicPersistantDatabase(string filename)
{
if (File.Exists(filename + ".xml"))
{
throw new FileNotFoundException("Xml with name " + filename + ".xml must " +
"exist for database (if previously persisted).");
}
// We read it.
database = MemoryDatabase.OpenDatabase(filename + current.ToString() + ".image");
}
/// <summary>
/// Persists to stream.
/// </summary>
/// <param name="filename">The filename.</param>
/// <param name="database">The database.</param>
public static void PersistToStream([NotEmpty] string filename, [NotNull] MemoryDatabase database)
{
Stream stream = File.Create(filename);
try
{
PersistToStream(stream, database);
}
finally
{
stream.Dispose();
}
}
/// <summary>
/// Persists this instance.
/// </summary>
public void Persist()
{
// We first change current.
if (current == 1)
{
current = 0;
}
else
{
current = 1;
}
// We write database first.
MemoryDatabase.PersistToStream(filename + current.ToString() + ".image", database);
// And update XML.
WriteXml();
}
/// <summary>
/// Persists to stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="database">The database.</param>
public static void PersistToStream(Stream stream, MemoryDatabase database)
{
Common.SerializeToStream(stream, database);
}
private CyclicPersistantDatabase(string filename, string name, Type type, StreamOptions ops)
{
this.filename = filename;
this.database = MemoryDatabase.CreateNewDatabase(name, type, ops);
}
