/// <summary>
/// Replays the changes in the current <see cref="Book"/> that have taken place since the <paramref name="savePoint"/> has been created.
/// </summary>
/// <param name="dataAdapter">The <see cref="ISaver"/> to which to replay the changes.</param>
/// <param name="savePoint">The <see cref="SavePoint"/> from which the changes should be replayed. If null, the entirety of the current <see cref="Book"/> will be replayed.</param>
public void Replay(ISaver dataAdapter, SavePoint savePoint = null)
{
SaveTrack track;
lock (this.lockMutex)
{
if (savePoint != null)
{
if (!this.saveTracks.ContainsKey(savePoint))
{
throw new InvalidOperationException("Could replay the book's modifications, because the save point could not be found.");
}
track = this.saveTracks[savePoint];
}
else
{
track = this.baseSaveTrack;
}
}
lock (track)
{
track.Replay(dataAdapter);
}
}
internal void RemoveSavePoint(SavePoint savePoint)
{
lock (this.lockMutex)
{
if (!this.saveTracks.ContainsKey(savePoint))
{
throw new InvalidOperationException("Could not remove the save point, because it does not exist in the book.");
}
this.saveTracks.Remove(savePoint);
}
}
/// <summary>
/// Creates a <see cref="SavePoint"/> that can be used to keep track of changes in the current <see cref="Book"/>.
/// </summary>
/// <returns>A <see cref="SavePoint"/> corresponding to the current state of the current <see cref="Book"/>.</returns>
public SavePoint CreateSavePoint()
{
lock (this.lockMutex)
{
var savePoint = new SavePoint(this);
this.saveTracks.Add(savePoint, new SaveTrack());
return savePoint;
}
}