final class DisjunctionScoreBlockBoundaryPropagator
extends java.lang.Object
A helper to propagate block boundaries for disjunctions.
Because a disjunction matches if any of its sub clauses matches, it is
tempting to return the minimum block boundary across all clauses. The problem
is that it might then make the query slow when the minimum competitive score
is high and low-scoring clauses don't drive iteration anymore. So this class
computes block boundaries only across clauses whose maximum score is greater
than or equal to the minimum competitive score, or the maximum scoring clause
if there is no such clause.