public bool TryGetValueByFirstKey(TKey1 key1, out IEnumerable <TKey2> result)
{
if (!Key1ToKey2.TryGetValue(key1, out var res))
{
result = null;
return(false);
}
result = res;
return(true);
}
public bool TryRemoveBySecondKey(TKey2 key2)
{
lock (this)
{
return(Key2ToKey1.TryRemove(key2, out var relevantKey1S) &&
relevantKey1S.Aggregate(true,
(current, key1) =>
current && Key1ToKey2.TryGetValue(key1, out var d) &&
d.TryRemove(key2)));
}
}
public K2 Get(K1 key1)
{
lock (Locker)
{
K2 key2;
if (Key1ToKey2.TryGetValue(key1, out key2))
{
return(key2);
}
else
{
return(default(K2));
}
}
}
public bool Remove(K1 key1)
{
lock (Locker)
{
K2 key2;
if (Key1ToKey2.TryGetValue(key1, out key2))
{
Key1ToKey2.Remove(key1);
Key2ToKey1.Remove(key2);
return(true);
}
else
{
return(false);
}
}
}