Package org.optaplanner.core.impl.score.stream.drools.common

Class BiLeftHandSide<A,​B>

  • Type Parameters:
    A - generic type of the first resulting variable
    B - generic type of the second resulting variable
    public final class BiLeftHandSide<A,​B>
extends Object
    Represents the left hand side of a Drools rule, the result of which are two variables. The simplest variant of such rule, with no filters or groupBys applied, would look like this in equivalent DRL: 
     
  rule "Simplest bivariate rule"
  when
      $a: Something()
      $b: SomethingElse()
  then
      // Do something with the $a and $b variables.
  end
    Usually though, there would be a joiner between the two, limiting the cartesian product: 
     
  rule "Bivariate join rule"
  when
      $a: Something($leftJoin: someValue)
      $b: SomethingElse(someOtherValue == $leftJoin)
  then
      // Do something with the $a and $b variables.
  end
    For more, see UniLeftHandSide.