/// <summary>
/// Get a hashcode for given search key.
/// </summary>
/// <param name="key">Reference to the key to get a hash value for.</param>
/// <returns>The hash value as an <see cref="UInt32"/>.</returns>
/// <remarks>
/// The hash returned should be properly randomized hash. The standard GetItemHashCode methods are usually not good enough.
/// A storeable item and a matching search key should return the same hash code.
/// So the statement <code>ItemEqualsItem(storeableItem, searchKey) ? GetItemHashCode(storeableItem) == GetItemHashCode(searchKey) : true </code> should always be true;
/// </remarks>
internal protected override UInt32 GetKeyHashCode(ref ConcurrentDictionaryKey <TKey, TValue> key)
{
return(Hasher.Rehash(_Comparer.GetHashCode(key._Key)));
}
/// <summary>
/// Get a hashcode for given storeable item.
/// </summary>
/// <param name="item">Reference to the item to get a hash value for.</param>
/// <returns>The hash value as an <see cref="UInt32"/>.</returns>
/// <remarks>
/// The hash returned should be properly randomized hash. The standard GetItemHashCode methods are usually not good enough.
/// A storeable item and a matching search key should return the same hash code.
/// So the statement <code>ItemEqualsItem(storeableItem, searchKey) ? GetItemHashCode(storeableItem) == GetItemHashCode(searchKey) : true </code> should always be true;
/// </remarks>
internal protected override UInt32 GetItemHashCode(ref KeyValuePair <TKey, TValue>?item)
{
return(item.HasValue ? Hasher.Rehash(_Comparer.GetHashCode(item.Value.Key)) : 0);
}