Package org.optaplanner.constraint.streams.drools.common

Class BiLeftHandSide<A,B>

java.lang.Object
org.optaplanner.constraint.streams.drools.common.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.

  • Field Details

  • Method Details

    • andFilter

      public BiLeftHandSide<A,B> andFilter(BiPredicate<A,B> predicate)

    • andExists

      public <C> BiLeftHandSide<A,B> andExists(Class<C> cClass, TriJoiner<A,B,C>[] joiners, Predicate<C> nullityFilter)

    • andNotExists

      public <C> BiLeftHandSide<A,B> andNotExists(Class<C> cClass, TriJoiner<A,B,C>[] joiners, Predicate<C> nullityFilter)

    • andJoin

      public <C> TriLeftHandSide<A,B,C> andJoin(UniLeftHandSide<C> right, TriJoiner<A,B,C> joiner)

    • andGroupBy

      public <NewA> UniLeftHandSide<NewA> andGroupBy(BiConstraintCollector<A,B,?,NewA> collector)

    • andGroupBy

      public <NewA, NewB> BiLeftHandSide<NewA,NewB> andGroupBy(BiConstraintCollector<A,B,?,NewA> collectorA, BiConstraintCollector<A,B,?,NewB> collectorB)

    • andGroupBy

      public <NewA, NewB, NewC> TriLeftHandSide<NewA,NewB,NewC> andGroupBy(BiConstraintCollector<A,B,?,NewA> collectorA, BiConstraintCollector<A,B,?,NewB> collectorB, BiConstraintCollector<A,B,?,NewC> collectorC)

    • andGroupBy

      public <NewA, NewB, NewC, NewD> QuadLeftHandSide<NewA,NewB,NewC,NewD> andGroupBy(BiConstraintCollector<A,B,?,NewA> collectorA, BiConstraintCollector<A,B,?,NewB> collectorB, BiConstraintCollector<A,B,?,NewC> collectorC, BiConstraintCollector<A,B,?,NewD> collectorD)

    • andGroupBy

      public <NewA> UniLeftHandSide<NewA> andGroupBy(BiFunction<A,B,NewA> keyMapping)

    • andGroupBy

      public <NewA, NewB> BiLeftHandSide<NewA,NewB> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiConstraintCollector<A,B,?,NewB> collectorB)

    • andGroupBy

      public <NewA, NewB, NewC> TriLeftHandSide<NewA,NewB,NewC> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiConstraintCollector<A,B,?,NewB> collectorB, BiConstraintCollector<A,B,?,NewC> collectorC)

    • andGroupBy

      public <NewA, NewB, NewC, NewD> QuadLeftHandSide<NewA,NewB,NewC,NewD> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiConstraintCollector<A,B,?,NewB> collectorB, BiConstraintCollector<A,B,?,NewC> collectorC, BiConstraintCollector<A,B,?,NewD> collectorD)

    • andGroupBy

      public <NewA, NewB> BiLeftHandSide<NewA,NewB> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiFunction<A,B,NewB> keyMappingB)

    • andGroupBy

      public <NewA, NewB, NewC> TriLeftHandSide<NewA,NewB,NewC> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiFunction<A,B,NewB> keyMappingB, BiConstraintCollector<A,B,?,NewC> collectorC)

    • andGroupBy

      public <NewA, NewB, NewC, NewD> QuadLeftHandSide<NewA,NewB,NewC,NewD> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiFunction<A,B,NewB> keyMappingB, BiConstraintCollector<A,B,?,NewC> collectorC, BiConstraintCollector<A,B,?,NewD> collectorD)

    • andGroupBy

      public <NewA, NewB, NewC> TriLeftHandSide<NewA,NewB,NewC> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiFunction<A,B,NewB> keyMappingB, BiFunction<A,B,NewC> keyMappingC)

    • andGroupBy

      public <NewA, NewB, NewC, NewD> QuadLeftHandSide<NewA,NewB,NewC,NewD> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiFunction<A,B,NewB> keyMappingB, BiFunction<A,B,NewC> keyMappingC, BiConstraintCollector<A,B,?,NewD> collectorD)

    • andGroupBy

      public <NewA, NewB, NewC, NewD> QuadLeftHandSide<NewA,NewB,NewC,NewD> andGroupBy(BiFunction<A,B,NewA> keyMappingA, BiFunction<A,B,NewB> keyMappingB, BiFunction<A,B,NewC> keyMappingC, BiFunction<A,B,NewD> keyMappingD)

    • andMap

      public <NewA> UniLeftHandSide<NewA> andMap(BiFunction<A,B,NewA> mapping)

    • andFlattenLast

      public <NewB> BiLeftHandSide<A,NewB> andFlattenLast(Function<B,Iterable<NewB>> mapping)

    • andTerminate

      public <Solution_> RuleBuilder<Solution_> andTerminate(ToIntBiFunction<A,B> matchWeigher)

    • andTerminate

      public <Solution_> RuleBuilder<Solution_> andTerminate(ToLongBiFunction<A,B> matchWeigher)

    • andTerminate

      public <Solution_> RuleBuilder<Solution_> andTerminate(BiFunction<A,B,BigDecimal> matchWeigher)

    • getConstraintType

      protected static org.drools.model.Index.ConstraintType getConstraintType(JoinerType type)

    • joinViewItemsWithLogicalAnd

      protected static org.drools.model.view.ViewItem<?> joinViewItemsWithLogicalAnd(PatternVariable<?,?,?>... patternVariables)

    • mergeViewItems

      protected static List<org.drools.model.view.ViewItem<?>> mergeViewItems(PatternVariable<?,?,?>... patternVariables)

    • decompose

      protected static <A, B> org.optaplanner.constraint.streams.drools.common.IndirectPatternVariable<B,org.optaplanner.constraint.streams.drools.common.BiTuple<A,B>> decompose(org.drools.model.Variable<org.optaplanner.constraint.streams.drools.common.BiTuple<A,B>> primaryVariable, org.drools.model.view.ViewItem<?> prerequisitePattern, org.drools.model.Variable<A> boundVarA, org.drools.model.Variable<B> boundVarB)
      Create an IndirectPatternVariable on BiTuple with pre-made bindings for its components variables.
      Type Parameters:
      A - generic type of the first bound variable
      B - generic type of the second bound variable
      Parameters:
      primaryVariable - never null
      prerequisitePattern - never null, pattern required to construct the variable
      boundVarA - never null, BiTuple.a
      boundVarB - never null, BiTuple.b
      Returns:
      never null

    • decomposeWithAccumulate

      protected static <A, B, C> org.optaplanner.constraint.streams.drools.common.DirectPatternVariable<C> decomposeWithAccumulate(org.drools.model.Variable<org.optaplanner.constraint.streams.drools.common.BiTuple<A,B>> primaryVariable, org.drools.model.view.ViewItem<?> prerequisitePattern, org.drools.model.Variable<A> boundVarA, org.drools.model.Variable<B> boundVarB, org.drools.model.Variable<C> accumulateOutput)
      Create a DirectPatternVariable on BiTuple with pre-made bindings for its components variables and one accumulate output variable.
      Type Parameters:
      A - generic type of the first bound variable
      B - generic type of the second bound variable
      C - generic type of the accumulate output variable
      Parameters:
      primaryVariable - never null
      prerequisitePattern - never null, pattern required to construct the variable
      boundVarA - never null, TriTuple.a
      boundVarB - never null, TriTuple.b
      accumulateOutput - never null, output of the accumulate function
      Returns:
      never null

    • decompose

      protected static <A, B, C> org.optaplanner.constraint.streams.drools.common.IndirectPatternVariable<C,org.optaplanner.constraint.streams.drools.common.TriTuple<A,B,C>> decompose(org.drools.model.Variable<org.optaplanner.constraint.streams.drools.common.TriTuple<A,B,C>> primaryVariable, org.drools.model.view.ViewItem<?> prerequisitePattern, org.drools.model.Variable<A> boundVarA, org.drools.model.Variable<B> boundVarB, org.drools.model.Variable<C> boundVarC)
      Create an IndirectPatternVariable on TriTuple with pre-made bindings for its components variables.
      Type Parameters:
      A - generic type of the first bound variable
      B - generic type of the second bound variable
      C - generic type of the third bound variable
      Parameters:
      primaryVariable - never null
      prerequisitePattern - never null, pattern required to construct the variable
      boundVarA - never null, TriTuple.a
      boundVarB - never null, TriTuple.b
      boundVarC - never null, TriTuple.c
      Returns:
      never null

    • decompose

      protected static <A, B, C, D> org.optaplanner.constraint.streams.drools.common.IndirectPatternVariable<D,org.optaplanner.constraint.streams.drools.common.QuadTuple<A,B,C,D>> decompose(org.drools.model.Variable<org.optaplanner.constraint.streams.drools.common.QuadTuple<A,B,C,D>> primaryVariable, org.drools.model.view.ViewItem<?> prerequisitePattern, org.drools.model.Variable<A> boundVarA, org.drools.model.Variable<B> boundVarB, org.drools.model.Variable<C> boundVarC, org.drools.model.Variable<D> boundVarD)
      Create an IndirectPatternVariable on QuadTuple with pre-made bindings for its components variables.
      Type Parameters:
      A - generic type of the first bound variable
      B - generic type of the second bound variable
      C - generic type of the third bound variable
      D - generic type of the fourth bound variable
      Parameters:
      primaryVariable - never null
      prerequisitePattern - never null, pattern required to construct the variable
      boundVarA - never null, QuadTuple.a
      boundVarB - never null, QuadTuple.b
      boundVarC - never null, QuadTuple.c
      boundVarD - never null, QuadTuple.d
      Returns:
      never null

    • decomposeWithAccumulate

      protected static <A, B, C, D> org.optaplanner.constraint.streams.drools.common.DirectPatternVariable<D> decomposeWithAccumulate(org.drools.model.Variable<org.optaplanner.constraint.streams.drools.common.TriTuple<A,B,C>> primaryVariable, org.drools.model.view.ViewItem<?> prerequisitePattern, org.drools.model.Variable<A> boundVarA, org.drools.model.Variable<B> boundVarB, org.drools.model.Variable<C> boundVarC, org.drools.model.Variable<D> accumulateOutput)
      Create a DirectPatternVariable on TriTuple with pre-made bindings for its components variables and one accumulate output variable.
      Type Parameters:
      A - generic type of the first bound variable
      B - generic type of the second bound variable
      C - generic type of the third bound variable
      D - generic type of the accumulate output variable
      Parameters:
      primaryVariable - never null
      prerequisitePattern - never null, pattern required to construct the variable
      boundVarA - never null, TriTuple.a
      boundVarB - never null, TriTuple.b
      boundVarC - never null, TriTuple.c
      accumulateOutput - never null, output of the accumulate function
      Returns:
      never null

    • buildAccumulate

      protected static org.drools.model.view.ViewItem<?> buildAccumulate(org.drools.model.view.ViewItem<?> innerAccumulatePattern, org.drools.model.functions.accumulate.AccumulateFunction... accFunctions)