/// <summary>
/// Lookup/create a key set for a single key scheme.
/// </summary>
/// <param name="scheme"></param>
/// <returns></returns>
private SingleKeySet NewKeysetFor(SingleKeyScheme scheme)
{
IKeySet keys;
if (!keySets.TryGetValue(scheme, out keys))
{
keys = new SingleKeySet();
keySets.Add(scheme, keys);
}
return (SingleKeySet)keys;
}
/// <summary>
/// Get the key set for a single scheme. This set should not be modified.
/// </summary>
/// <param name="scheme">The scheme.</param>
/// <returns>The key set for the scheme. Will be empty if no keys are defined for the scheme.</returns>
public SingleKeySet KeysetFor(SingleKeyScheme scheme)
{
IKeySet keys;
if (!keySets.TryGetValue(scheme, out keys))
return EmptySingleKeyset;
else
return (SingleKeySet)keys;
}
/// <summary>
/// Remove a key for single key scheme.
/// </summary>
/// <param name="scheme">The key scheme.</param>
/// <param name="key">The key to remove.</param>
public virtual void Remove(SingleKeyScheme scheme, Key key)
{
IKeySet keys;
if (keySets.TryGetValue(scheme, out keys))
{
keys.Remove(key);
if (keys.IsEmpty)
keySets.Remove(scheme);
}
}
/// <summary>
/// Add a key for single key scheme.
/// </summary>
/// <param name="scheme">The key scheme.</param>
/// <param name="key">The key to add.</param>
public virtual void Add(SingleKeyScheme scheme, Key key)
{
NewKeysetFor(scheme).Add(key);
}
