in spark/hbase-spark/src/main/scala/org/apache/hadoop/hbase/spark/DefaultSource.scala [760:769]
def containsPoint(point: Array[Byte]): Boolean = {
val lowerCompare = compareRange(point, lowerBound)
val upperCompare = compareRange(point, upperBound)
((isLowerBoundEqualTo && lowerCompare >= 0) ||
(!isLowerBoundEqualTo && lowerCompare > 0)) &&
((isUpperBoundEqualTo && upperCompare <= 0) ||
(!isUpperBoundEqualTo && upperCompare < 0))
}