public static Classifier Enqueue(this Classifier classifier, Qualifier tail)
{
classifier?.Path.Add(tail);
return(classifier);
}
/// <summary>
/// True, if the given qualifier is held by this classifier.
/// </summary>
/// <param name="classifier">The classifier</param>
/// <param name="qualifier">The qualifier</param>
/// <returns>True, if the qualifier is held by this classifier</returns>
public static bool IsExactMatching(this Classifier classifier, Qualifier qualifier)
{
return(classifier.Path.Any(q => q.Equals(qualifier)));
}
/// <summary>
/// True, if the classifier is empty.
/// </summary>
/// <param name="classifier">The classifier</param>
/// <returns>True if empty</returns>
public static bool IsNothing(this Classifier classifier)
{
return(null == classifier || classifier.Path.Count == 0);
}
/// <summary>
/// If a classifier contains only unique qualifiers.
/// </summary>
/// <param name="classifier">The classifier</param>
/// <returns>True, if each path qualifier is unique (no cycles)</returns>
public static bool IsValid(this Classifier classifier)
{
var set = new HashSet <Qualifier>(classifier?.Path);
return(set.Count == classifier?.Path.Count);
}
/// <summary>
/// Counterpart of <see cref="IsNothing(Classifier)"/>
/// </summary>
/// <param name="classifier">The classifier</param>
/// <returns>True if the classifier holds any path of qualifiers</returns>
public static bool IsSomething(this Classifier classifier)
{
return(!classifier.IsNothing());
}