/// <inheritdoc />
public TInterest this[TKey key]
{
get
{
IInterestMapContracts.Indexer(this, key);
TInterest result;
return(this.map.TryGetValue(key, out result) ? result : this.merger.None);
}
}
/// <inheritdoc />
public void AddInterest(TKey key, TInterest interest)
{
IInterestMapContracts.AddInterest(this, key);
TInterest previous = this[key];
TInterest next = this.merger.GetInterestByAdding(previous, interest);
if (!this.merger.Comparer.Equals(previous, next))
{
this.map[key] = next;
this.interestsChanged.OnNext(KeyValuePair.New(key, SequentialPair.New(previous, next)));
}
}
/// <inheritdoc />
public void UpdateInterests(TInterest interest, IReadOnlySet <TKey> addTo, IReadOnlySet <TKey> removeFrom)
{
IInterestMapContracts.UpdateInterests(this, addTo, removeFrom);
foreach (var key in addTo)
{
if (!removeFrom.Contains(key))
{
this.AddInterest(key, interest);
}
}
foreach (var key in removeFrom)
{
if (!addTo.Contains(key))
{
this.RemoveInterest(key, interest);
}
}
}
/// <inheritdoc />
public void RemoveInterest(TKey key, TInterest interest)
{
IInterestMapContracts.RemoveInterest(this, key);
TInterest previous = this[key];
TInterest next = this.merger.GetInterestByRemoving(previous, interest);
if (!this.merger.Comparer.Equals(previous, next))
{
if (this.merger.Comparer.Equals(next, this.merger.None))
{
this.map.Remove(key);
}
else
{
this.map[key] = next;
}
this.interestsChanged.OnNext(KeyValuePair.New(key, SequentialPair.New(previous, next)));
}
}
