/// <summary>
/// Selects items keys by the specified index key.
/// </summary>
public IEnumerable <int> SelectItemKeys(object indexKey)
{
if (ItemGroups.TryGetValue(CastIndexKey(indexKey), out IndexGroup group))
{
foreach (int key in group.Keys)
{
yield return(key);
}
}
}
/// <summary>
/// Selects items by the specified index key.
/// </summary>
public IEnumerable SelectItems(object indexKey)
{
if (ItemGroups.TryGetValue(CastIndexKey(indexKey), out IndexGroup group))
{
foreach (object item in group.Values)
{
yield return(item);
}
}
}
/// <summary>
/// Selects items by the specified index key.
/// </summary>
public IEnumerable SelectItems(int indexKey)
{
if (ItemGroups.TryGetValue(indexKey, out SortedDictionary <int, object> group))
{
foreach (object item in group.Values)
{
yield return(item);
}
}
}
/// <summary>
/// Adds the item to the index.
/// </summary>
public void AddToIndex(object item, int itemKey)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
TKey indexKey = GetIndexKey(item);
if (!ItemGroups.TryGetValue(indexKey, out IndexGroup group))
{
group = new IndexGroup();
ItemGroups.Add(indexKey, group);
}
group[itemKey] = (TItem)item;
}
/// <summary>
/// Adds the item to the index.
/// </summary>
public void AddToIndex(object item, int itemKey)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
int indexKey = GetIndexKey(item);
if (!ItemGroups.TryGetValue(indexKey, out SortedDictionary <int, object> group))
{
group = new SortedDictionary <int, object>();
ItemGroups.Add(indexKey, group);
}
group[itemKey] = item;
}
/// <summary>
/// Removes the item from the index.
/// </summary>
public void RemoveFromIndex(object item, int itemKey)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
int indexKey = GetIndexKey(item);
if (ItemGroups.TryGetValue(indexKey, out SortedDictionary <int, object> group))
{
group.Remove(itemKey);
if (group.Count == 0)
{
ItemGroups.Remove(indexKey);
}
}
}
private void ParseItemGroup(string line)
{
if (IsStartOfState(line) ||
line.TrimStart().StartsWith(LineMarkers.ItemGroupEnd))
{
return;
}
var itemGroupType = GetCurrentOrNewItemGroup(line);
if (!ItemGroups.TryGetValue(itemGroupType, out var lines))
{
lines = new List <string>();
ItemGroups[itemGroupType] = lines;
}
lines.Add(line);
}