public virtual void RestoreEngines()
{
EntityTable restoredEngines =
persistenceStrategy.Restore(engines);
engines.Restore(restoredEngines);
}
internal override void Save(EntityTable table)
{
Stream stream = File.Open(GetFileName(table) +
FileSuffix, FileMode.Create);
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(stream, table);
stream.Close();
}
// private constructor
private DatabaseFacade()
{
engines = new EntityTable(EntityKeyGenerator.Instance);
engines.EntityTableItemAdded += HandleEngineAdded;
engines.EntityTableRestored += HandleEnginesRestored;
// Set which persistence strategy to use
// (maybe get from configuration settings somewhere)
persistenceStrategy = new EntitySerializationStrategy();
}
// private constructor
private DatabaseFacade()
{
engines = new EntityTable(EntityKeyGenerator.Instance);
engines.EntityTableItemAdded += HandleEngineAdded;
engines.EntityTableRestored += HandleEnginesRestored;
// Set which persistence strategy to use
// (maybe get from configuration settings somewhere)
persistenceStrategy = new EntitySerializationStrategy();
}
internal override EntityTable Restore(EntityTable table)
{
Stream stream = File.Open(GetFileName(table) +
FileSuffix, FileMode.Open);
BinaryFormatter formatter = new BinaryFormatter();
EntityTable restoredTable =
(EntityTable)formatter.Deserialize(stream);
stream.Close();
return(restoredTable);
}
internal virtual void Restore(EntityTable restoredTable)
{
entities.Clear();
foreach (KeyValuePair<int?, object> pair in
restoredTable.entities)
{
entities.Add(pair.Key, pair.Value);
}
if (EntityTableRestored != null)
{
EntityTableRestored(this, EventArgs.Empty);
}
}
internal virtual void Restore(EntityTable restoredTable)
{
entities.Clear();
foreach (KeyValuePair <int?, object> pair in
restoredTable.entities)
{
entities.Add(pair.Key, pair.Value);
}
if (EntityTableRestored != null)
{
EntityTableRestored(this, EventArgs.Empty);
}
}
internal override EntityTable Restore(EntityTable table)
{
// code to restore table data from CSV format (omitted)
return(table);
}
internal override void Save(EntityTable table)
{
// code to save table data in CSV format (omitted)
}
internal abstract void Save(EntityTable table);
internal abstract void Save(EntityTable table);
internal virtual string GetFileName(EntityTable table)
{
return table.GetType().Name;
}
internal abstract EntityTable Restore(EntityTable table);
internal override void Save(EntityTable table)
{
// code to save table data in CSV format (omitted)
}
internal abstract EntityTable Restore(EntityTable table);
internal override EntityTable Restore(EntityTable table)
{
// code to restore table data from CSV format (omitted)
return table;
}
internal virtual string GetFileName(EntityTable table)
{
return(table.GetType().Name);
}
