private static int HashAttributeNode(AttributeFilterNode nodeBuilder)
{
var suffix = nodeBuilder.Wildcard ? "*" : "";
var stringToHash = nodeBuilder.Key + suffix;
return(stringToHash.GetHashCode());
}
private static AttributeFilterNode MergeAttributeNodes(AttributeFilterNode left, AttributeFilterNode right)
{
var key = left.Wildcard ? left.Key + "*" : left.Key;
var includes = left.DestinationIncludes | right.DestinationIncludes;
var excludes = left.DestinationExcludes | right.DestinationExcludes;
return(new AttributeFilterNode(key, includes, excludes));
}
private static bool CanParentAcceptChild(AttributeFilterNode parent, AttributeFilterNode orphan)
{
if (!parent.Wildcard)
{
return(false);
}
if (!orphan.Key.StartsWith(parent.Key))
{
return(false);
}
return(true);
}
private static int CompareAttributeNodes(AttributeFilterNode left, AttributeFilterNode right)
{
// keys are different, just use the key comparison result
if (left.Key != right.Key)
{
return(string.Compare(left.Key, right.Key, StringComparison.Ordinal));
}
// keys match and wildcard is the same, the attribute nodes are the same (possibly different rules, will need merging)
if (left.Wildcard == right.Wildcard)
{
return(0);
}
// keys match, wildcards differ, the one with the wildcard comes first
return(left.Wildcard ? -1 : 1);
}
private static bool CanNodeHaveChildren(AttributeFilterNode node)
{
return(node.Wildcard);
}
