package gw.rating.rtm.matchop

uses gw.api.database.Query
uses gw.api.database.Relop
uses gw.rating.rtm.domain.OrderedPersistenceAdapter
uses java.lang.Comparable
uses java.math.RoundingMode

@ReadOnly
class StatelessLessThanMatch extends StatelessLessThanOrEqualMatch {
   construct(matchOp : RateTableMatchOp) {
     super(matchOp)
  }

  override function filter(query: Query<KeyableBean>, arg: Comparable<Object>) {
    // DB layer forces us to compare Column to arg rather than the inverse.
    // So this matchop actually computes Column > arg, not arg < Column
    query.compare(ColumnName, Relop.GreaterThan, arg)
  }

  override protected function compareMin(bean : OrderedPersistenceAdapter, arg : Comparable) : int {
    // Return "equal" until we encounter a bean which is <= arg
    return bean.get(this.ArgIndex).compareTo(arg) > 0 ? 0 : -1
  }

  override protected function getRounding(paramIndex : int) : RoundingMode {
    // input value 2.5 vs row value 3 should match (2.5 < 3); vs row value 2 (2.5 < 2) should not
    // we actually compute the reverse, i.e. (3 > 2.5) and (2 > 2.5)
    // so we convert input value 2.5 to 2, giving (3 > 2) and (2 > 2)
    return FLOOR
  }

}