Class SingletonIntersectExpression.SingletonIntersectElaborator

  • Enclosing class:
    SingletonIntersectExpression

    public static class SingletonIntersectExpression.SingletonIntersectElaborator
    extends ItemElaborator
    Elaborator for a Venn expression: that is A union B, A intersect B, or A except B
    • Constructor Detail

      • SingletonIntersectElaborator

        public SingletonIntersectElaborator()
    • Method Detail

      • elaborateForItem

        public ItemEvaluator elaborateForItem()
        Description copied from class: Elaborator
        Get a function that evaluates the underlying expression in the form of a Item. This must only be called for expressions whose result has cardinality zero or one.
        Specified by:
        elaborateForItem in class ItemElaborator
        Returns:
        an evaluator for the expression that returns an Item, or null to represent an empty sequence.