/// <summary> /// Update MetaData information. /// </summary> /// <param name="oldMetadata">Outdated metadata.</param> /// <param name="newMetada">Updated metadata.</param> /// <returns>true if update successful.</returns> public abstract bool Update(Metadata oldMetadata, Metadata newMetada);
/// <summary>
/// Update meta data including file metadata and folder metadata
/// </summary>
/// <param name="oldMetadata"></param>
/// <param name="newMetada"></param>
/// <returns></returns>
public override bool Update(Metadata oldMetadata, Metadata newMetada)
{
var db = new SQLiteAccess(Path.Combine(this.StoragePath, Configuration.DATABASE_NAME),false);
using (SqliteConnection con = db.NewSQLiteConnection())
{
if (con == null)
throw new DatabaseException(String.Format(m_ResourceManager.GetString("err_somethingNotFound"), Path.Combine(this.StoragePath, Configuration.DATABASE_NAME)));
var trasaction = (SqliteTransaction)con.BeginTransaction();
// TODO: make 3 actions atomic
try
{
if (!UpdateFileMetadata(oldMetadata.FileMetadata, newMetada.FileMetadata, con))
throw new Exception();
if (!UpdateFolderMetadata(oldMetadata.FolderMetadata, newMetada.FolderMetadata, con))
throw new Exception();
trasaction.Commit();
}
catch (Exception)
{
trasaction.Rollback();
return false;
}
}
return true;
}