java.lang.Object
- org.optaplanner.core.impl.score.stream.common.AbstractConstraintStream<Solution_>
- - org.optaplanner.core.impl.score.stream.drools.common.DroolsAbstractConstraintStream<Solution_>
  - - org.optaplanner.core.impl.score.stream.drools.bi.DroolsAbstractBiConstraintStream<Solution_,A,B>

All Implemented Interfaces:

BiConstraintStream<A,B>, ConstraintStream, InnerBiConstraintStream<A,B>

Direct Known Subclasses:

DroolsExistsBiConstraintStream, DroolsFilterBiConstraintStream, DroolsFlatteningBiConstraintStream, DroolsGroupingBiConstraintStream, DroolsJoinBiConstraintStream
```
public abstract class DroolsAbstractBiConstraintStream<Solution_,A,B>
extends DroolsAbstractConstraintStream<Solution_>
implements InnerBiConstraintStream<A,B>
```

Field Summary
- Fields inherited from class org.optaplanner.core.impl.score.stream.drools.common.DroolsAbstractConstraintStream
  constraintFactory

Constructor Summary

Constructors
Constructor	Description
`DroolsAbstractBiConstraintStream(DroolsConstraintFactory<Solution_> constraintFactory, RetrievalSemantics retrievalSemantics)`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`BiConstraintStream<A,B>`	`filter(BiPredicate<A,B> predicate)`	Exhaustively test each tuple of facts against the `BiPredicate` and match if `BiPredicate.test(Object, Object)` returns true.
`<ResultB_> BiConstraintStream<A,ResultB_>`	`flattenLast(Function<B,Iterable<ResultB_>> mapping)`	Takes each tuple and applies a mapping on the last fact, which turns it into `Iterable`.
`abstract BiLeftHandSide<A,B>`	`getLeftHandSide()`
`<GroupKey_> UniConstraintStream<GroupKey_>`	`groupBy(BiFunction<A,B,GroupKey_> groupKeyMapping)`	Convert the `BiConstraintStream` to a `UniConstraintStream`, containing the set of tuples resulting from applying the group key mapping function on all tuples of the original stream.
`<GroupKey_,__,Result_> BiConstraintStream<GroupKey_,Result_>`	`groupBy(BiFunction<A,B,GroupKey_> groupKeyMapping, BiConstraintCollector<A,B,__,Result_> collector)`	Convert the `BiConstraintStream` to a different `BiConstraintStream`, consisting of unique tuples.
`<GroupKey_,ResultContainerB_,ResultB_,ResultContainerC_,ResultC_> TriConstraintStream<GroupKey_,ResultB_,ResultC_>`	`groupBy(BiFunction<A,B,GroupKey_> groupKeyMapping, BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB, BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC)`	Convert the `BiConstraintStream` to a `TriConstraintStream`, consisting of unique tuples with three facts.
`<GroupKey_,ResultContainerB_,ResultB_,ResultContainerC_,ResultC_,ResultContainerD_,ResultD_> QuadConstraintStream<GroupKey_,ResultB_,ResultC_,ResultD_>`	`groupBy(BiFunction<A,B,GroupKey_> groupKeyMapping, BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB, BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC, BiConstraintCollector<A,B,ResultContainerD_,ResultD_> collectorD)`	Convert the `BiConstraintStream` to a `QuadConstraintStream`, consisting of unique tuples with four facts.
`<GroupKeyA_,GroupKeyB_> BiConstraintStream<GroupKeyA_,GroupKeyB_>`	`groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping, BiFunction<A,B,GroupKeyB_> groupKeyBMapping)`	Convert the `BiConstraintStream` to a different `BiConstraintStream`, consisting of unique tuples.
`<GroupKeyA_,GroupKeyB_,GroupKeyC_> TriConstraintStream<GroupKeyA_,GroupKeyB_,GroupKeyC_>`	`groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping, BiFunction<A,B,GroupKeyB_> groupKeyBMapping, BiFunction<A,B,GroupKeyC_> groupKeyCMapping)`	Convert the `BiConstraintStream` to a `TriConstraintStream`, consisting of unique tuples with three facts.
`<GroupKeyA_,GroupKeyB_,GroupKeyC_,GroupKeyD_> QuadConstraintStream<GroupKeyA_,GroupKeyB_,GroupKeyC_,GroupKeyD_>`	`groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping, BiFunction<A,B,GroupKeyB_> groupKeyBMapping, BiFunction<A,B,GroupKeyC_> groupKeyCMapping, BiFunction<A,B,GroupKeyD_> groupKeyDMapping)`	Convert the `BiConstraintStream` to a `QuadConstraintStream`, consisting of unique tuples with four facts.
`<GroupKeyA_,GroupKeyB_,GroupKeyC_,ResultContainerD_,ResultD_> QuadConstraintStream<GroupKeyA_,GroupKeyB_,GroupKeyC_,ResultD_>`	`groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping, BiFunction<A,B,GroupKeyB_> groupKeyBMapping, BiFunction<A,B,GroupKeyC_> groupKeyCMapping, BiConstraintCollector<A,B,ResultContainerD_,ResultD_> collectorD)`	Combines the semantics of `BiConstraintStream.groupBy(BiFunction, BiFunction)` and `BiConstraintStream.groupBy(BiConstraintCollector)`.
`<GroupKeyA_,GroupKeyB_,ResultContainer_,Result_> TriConstraintStream<GroupKeyA_,GroupKeyB_,Result_>`	`groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping, BiFunction<A,B,GroupKeyB_> groupKeyBMapping, BiConstraintCollector<A,B,ResultContainer_,Result_> collector)`	Combines the semantics of `BiConstraintStream.groupBy(BiFunction, BiFunction)` and `BiConstraintStream.groupBy(BiConstraintCollector)`.
`<GroupKeyA_,GroupKeyB_,ResultContainerC_,ResultC_,ResultContainerD_,ResultD_> QuadConstraintStream<GroupKeyA_,GroupKeyB_,ResultC_,ResultD_>`	`groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping, BiFunction<A,B,GroupKeyB_> groupKeyBMapping, BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC, BiConstraintCollector<A,B,ResultContainerD_,ResultD_> collectorD)`	Combines the semantics of `BiConstraintStream.groupBy(BiFunction, BiFunction)` and `BiConstraintStream.groupBy(BiConstraintCollector)`.
`<ResultContainer_,Result_> UniConstraintStream<Result_>`	`groupBy(BiConstraintCollector<A,B,ResultContainer_,Result_> collector)`	Runs all tuples of the stream through a given @`BiConstraintCollector` and converts them into a new `UniConstraintStream` which only has a single tuple, the result of applying `BiConstraintCollector`.
`<ResultContainerA_,ResultA_,ResultContainerB_,ResultB_> BiConstraintStream<ResultA_,ResultB_>`	`groupBy(BiConstraintCollector<A,B,ResultContainerA_,ResultA_> collectorA, BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB)`	Convert the `BiConstraintStream` to a `BiConstraintStream`, containing only a single tuple, the result of applying two `BiConstraintCollector`s.
`<ResultContainerA_,ResultA_,ResultContainerB_,ResultB_,ResultContainerC_,ResultC_> TriConstraintStream<ResultA_,ResultB_,ResultC_>`	`groupBy(BiConstraintCollector<A,B,ResultContainerA_,ResultA_> collectorA, BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB, BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC)`	Convert the `BiConstraintStream` to a `TriConstraintStream`, containing only a single tuple, the result of applying three `BiConstraintCollector`s.
`<ResultContainerA_,ResultA_,ResultContainerB_,ResultB_,ResultContainerC_,ResultC_,ResultContainerD_,ResultD_> QuadConstraintStream<ResultA_,ResultB_,ResultC_,ResultD_>`	`groupBy(BiConstraintCollector<A,B,ResultContainerA_,ResultA_> collectorA, BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB, BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC, BiConstraintCollector<A,B,ResultContainerD_,ResultD_> collectorD)`	Convert the `BiConstraintStream` to a `QuadConstraintStream`, containing only a single tuple, the result of applying four `BiConstraintCollector`s.
`<C> BiConstraintStream<A,B>`	`ifExists(Class<C> otherClass, TriJoiner<A,B,C>... joiners)`	As defined by `BiConstraintStream.ifExists(Class, TriJoiner)`.
`<C> BiConstraintStream<A,B>`	`ifExistsIncludingNullVars(Class<C> otherClass, TriJoiner<A,B,C>... joiners)`	As defined by `BiConstraintStream.ifExistsIncludingNullVars(Class, TriJoiner)`.
`<C> BiConstraintStream<A,B>`	`ifNotExists(Class<C> otherClass, TriJoiner<A,B,C>... joiners)`	As defined by `BiConstraintStream.ifNotExists(Class, TriJoiner)`.
`<C> BiConstraintStream<A,B>`	`ifNotExistsIncludingNullVars(Class<C> otherClass, TriJoiner<A,B,C>... joiners)`	As defined by `BiConstraintStream.ifNotExistsIncludingNullVars(Class, TriJoiner)`.
`Constraint`	`impactScore(String constraintPackage, String constraintName, Score<?> constraintWeight, ToIntBiFunction<A,B> matchWeigher, ScoreImpactType impactType)`
`Constraint`	`impactScore(String constraintPackage, String constraintName, Score<?> constraintWeight, ScoreImpactType impactType)`
`Constraint`	`impactScoreBigDecimal(String constraintPackage, String constraintName, Score<?> constraintWeight, BiFunction<A,B,BigDecimal> matchWeigher, ScoreImpactType impactType)`
`Constraint`	`impactScoreConfigurable(String constraintPackage, String constraintName, ToIntBiFunction<A,B> matchWeigher, ScoreImpactType impactType)`
`Constraint`	`impactScoreConfigurable(String constraintPackage, String constraintName, ScoreImpactType impactType)`
`Constraint`	`impactScoreConfigurableBigDecimal(String constraintPackage, String constraintName, BiFunction<A,B,BigDecimal> matchWeigher, ScoreImpactType impactType)`
`Constraint`	`impactScoreConfigurableLong(String constraintPackage, String constraintName, ToLongBiFunction<A,B> matchWeigher, ScoreImpactType impactType)`
`Constraint`	`impactScoreLong(String constraintPackage, String constraintName, Score<?> constraintWeight, ToLongBiFunction<A,B> matchWeigher, ScoreImpactType impactType)`
`<C> TriConstraintStream<A,B,C>`	`join(Class<C> otherClass, TriJoiner<A,B,C>... joiners)`	As defined by `BiConstraintStream.join(Class, TriJoiner)`.
`<C> TriConstraintStream<A,B,C>`	`join(UniConstraintStream<C> otherStream, TriJoiner<A,B,C> joiner)`	Create a new `TriConstraintStream` for every combination of [A, B] and C for which the `TriJoiner` is true (for the properties it extracts from both facts).
`<ResultA_> UniConstraintStream<ResultA_>`	`map(BiFunction<A,B,ResultA_> mapping)`	As defined by `UniConstraintStream.map(Function)`.

Methods inherited from class org.optaplanner.core.impl.score.stream.drools.common.DroolsAbstractConstraintStream
addChildStream, buildConstraint, buildConstraintConfigurable, getChildStreams, getConstraintFactory

Methods inherited from class org.optaplanner.core.impl.score.stream.common.AbstractConstraintStream
buildConstraintWeightExtractor, buildConstraintWeightExtractor, getRetrievalSemantics, impact, penalize, penalizeConfigurable, reward, rewardConfigurable

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.optaplanner.core.api.score.stream.ConstraintStream
getConstraintFactory, impact, impact, penalize, penalize, penalizeConfigurable, penalizeConfigurable, reward, reward, rewardConfigurable, rewardConfigurable

Methods inherited from interface org.optaplanner.core.impl.score.stream.bi.InnerBiConstraintStream
distinct, guaranteesDistinct, impact, impactBigDecimal, impactConfigurable, impactConfigurableBigDecimal, impactConfigurableLong, impactLong, penalize, penalizeBigDecimal, penalizeConfigurable, penalizeConfigurableBigDecimal, penalizeConfigurableLong, penalizeLong, reward, rewardBigDecimal, rewardConfigurable, rewardConfigurableBigDecimal, rewardConfigurableLong, rewardLong

- Constructor Detail
  - DroolsAbstractBiConstraintStream
```
public DroolsAbstractBiConstraintStream(DroolsConstraintFactory<Solution_> constraintFactory,
                                        RetrievalSemantics retrievalSemantics)
```
- Method Detail
  - filter
```
public BiConstraintStream<A,B> filter(BiPredicate<A,B> predicate)
```
    Description copied from interface: BiConstraintStream
    
    Exhaustively test each tuple of facts against the BiPredicate and match if BiPredicate.test(Object, Object) returns true.
    Important: This is slower and less scalable than UniConstraintStream.join(UniConstraintStream, BiJoiner) with a proper BiJoiner predicate (such as Joiners.equal(Function, Function), because the latter applies hashing and/or indexing, so it doesn't create every combination just to filter it out.
    
    Specified by:
    
    filter in interface BiConstraintStream<Solution_,A>
    
    Parameters:
    
    predicate - never null
    
    Returns:
    
    never null
  - join
```
public <C> TriConstraintStream<A,B,C> join(UniConstraintStream<C> otherStream,
                                                       TriJoiner<A,B,C> joiner)
```
    Description copied from interface: BiConstraintStream
    
    Create a new TriConstraintStream for every combination of [A, B] and C for which the TriJoiner is true (for the properties it extracts from both facts).
    Important: This is faster and more scalable than a join followed by a filter, because it applies hashing and/or indexing on the properties, so it doesn't create nor checks every combination of [A, B] and C.
    
    Specified by:
    
    join in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    C - the type of the third matched fact
    
    Parameters:
    
    otherStream - never null
    
    joiner - never null
    
    Returns:
    
    never null, a stream that matches every combination of [A, B] and C for which the TriFunction is true
  - join
```
public <C> TriConstraintStream<A,B,C> join(Class<C> otherClass,
                                                       TriJoiner<A,B,C>... joiners)
```
    Description copied from interface: BiConstraintStream
    
    As defined by BiConstraintStream.join(Class, TriJoiner). For performance reasons, indexing joiners must be placed before filtering joiners.
    This method causes Unchecked generics array creation for varargs parameter warnings, but we can't fix it with a SafeVarargs annotation because it's an interface method. Therefore, there are overloaded methods with up to 4 BiJoiner parameters.
    
    Specified by:
    
    join in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    C - the type of the third matched fact
    
    Parameters:
    
    otherClass - never null
    
    joiners - never null
    
    Returns:
    
    never null, a stream that matches every combination of [A, B] and C for which all the joiners are true
  - ifExists
```
@SafeVarargs
public final <C> BiConstraintStream<A,B> ifExists(Class<C> otherClass,
                                                        TriJoiner<A,B,C>... joiners)
```
    Description copied from interface: BiConstraintStream
    
    As defined by BiConstraintStream.ifExists(Class, TriJoiner). For performance reasons, indexing joiners must be placed before filtering joiners.
    This method causes Unchecked generics array creation for varargs parameter warnings, but we can't fix it with a SafeVarargs annotation because it's an interface method. Therefore, there are overloaded methods with up to 4 TriJoiner parameters.
    
    Specified by:
    
    ifExists in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    C - the type of the third matched fact
    
    Parameters:
    
    otherClass - never null
    
    joiners - never null
    
    Returns:
    
    never null, a stream that matches every pair of A and B where C exists for which the TriJoiners are true
  - ifExistsIncludingNullVars
```
@SafeVarargs
public final <C> BiConstraintStream<A,B> ifExistsIncludingNullVars(Class<C> otherClass,
                                                                         TriJoiner<A,B,C>... joiners)
```
    Description copied from interface: BiConstraintStream
    
    As defined by BiConstraintStream.ifExistsIncludingNullVars(Class, TriJoiner). For performance reasons, indexing joiners must be placed before filtering joiners.
    This method causes Unchecked generics array creation for varargs parameter warnings, but we can't fix it with a SafeVarargs annotation because it's an interface method. Therefore, there are overloaded methods with up to 4 TriJoiner parameters.
    
    Specified by:
    
    ifExistsIncludingNullVars in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    C - the type of the third matched fact
    
    Parameters:
    
    otherClass - never null
    
    joiners - never null
    
    Returns:
    
    never null, a stream that matches every pair of A and B where C exists for which the TriJoiners are true
  - ifNotExists
```
@SafeVarargs
public final <C> BiConstraintStream<A,B> ifNotExists(Class<C> otherClass,
                                                           TriJoiner<A,B,C>... joiners)
```
    Description copied from interface: BiConstraintStream
    
    As defined by BiConstraintStream.ifNotExists(Class, TriJoiner). For performance reasons, indexing joiners must be placed before filtering joiners.
    This method causes Unchecked generics array creation for varargs parameter warnings, but we can't fix it with a SafeVarargs annotation because it's an interface method. Therefore, there are overloaded methods with up to 4 TriJoiner parameters.
    
    Specified by:
    
    ifNotExists in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    C - the type of the third matched fact
    
    Parameters:
    
    otherClass - never null
    
    joiners - never null
    
    Returns:
    
    never null, a stream that matches every pair of A and B where C does not exist for which the TriJoiners are true
  - ifNotExistsIncludingNullVars
```
@SafeVarargs
public final <C> BiConstraintStream<A,B> ifNotExistsIncludingNullVars(Class<C> otherClass,
                                                                            TriJoiner<A,B,C>... joiners)
```
    Description copied from interface: BiConstraintStream
    
    As defined by BiConstraintStream.ifNotExistsIncludingNullVars(Class, TriJoiner). For performance reasons, indexing joiners must be placed before filtering joiners.
    This method causes Unchecked generics array creation for varargs parameter warnings, but we can't fix it with a SafeVarargs annotation because it's an interface method. Therefore, there are overloaded methods with up to 4 TriJoiner parameters.
    
    Specified by:
    
    ifNotExistsIncludingNullVars in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    C - the type of the third matched fact
    
    Parameters:
    
    otherClass - never null
    
    joiners - never null
    
    Returns:
    
    never null, a stream that matches every pair of A and B where C does not exist for which the TriJoiners are true
  - groupBy
```
public <ResultContainer_,Result_> UniConstraintStream<Result_> groupBy(BiConstraintCollector<A,B,ResultContainer_,Result_> collector)
```
    Description copied from interface: BiConstraintStream
    
    Runs all tuples of the stream through a given @BiConstraintCollector and converts them into a new UniConstraintStream which only has a single tuple, the result of applying BiConstraintCollector.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    ResultContainer_ - the mutable accumulation type (often hidden as an implementation detail)
    
    Result_ - the type of a fact in the destination UniConstraintStream's tuple
    
    Parameters:
    
    collector - never null, the collector to perform the grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <ResultContainerA_,ResultA_,ResultContainerB_,ResultB_> BiConstraintStream<ResultA_,ResultB_> groupBy(BiConstraintCollector<A,B,ResultContainerA_,ResultA_> collectorA,
                                                                                                                                     BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a BiConstraintStream, containing only a single tuple, the result of applying two BiConstraintCollectors.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    ResultContainerA_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultA_ - the type of the first fact in the destination BiConstraintStream's tuple
    
    ResultContainerB_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultB_ - the type of the second fact in the destination BiConstraintStream's tuple
    
    Parameters:
    
    collectorA - never null, the collector to perform the first grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorB - never null, the collector to perform the second grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <ResultContainerA_,ResultA_,ResultContainerB_,ResultB_,ResultContainerC_,ResultC_> TriConstraintStream<ResultA_,ResultB_,ResultC_> groupBy(BiConstraintCollector<A,B,ResultContainerA_,ResultA_> collectorA,
                                                                                                                                                                                            BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB,
                                                                                                                                                                                            BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a TriConstraintStream, containing only a single tuple, the result of applying three BiConstraintCollectors.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    ResultContainerA_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultA_ - the type of the first fact in the destination TriConstraintStream's tuple
    
    ResultContainerB_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultB_ - the type of the second fact in the destination TriConstraintStream's tuple
    
    ResultContainerC_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultC_ - the type of the third fact in the destination TriConstraintStream's tuple
    
    Parameters:
    
    collectorA - never null, the collector to perform the first grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorB - never null, the collector to perform the second grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorC - never null, the collector to perform the third grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <ResultContainerA_,ResultA_,ResultContainerB_,ResultB_,ResultContainerC_,ResultC_,ResultContainerD_,ResultD_> QuadConstraintStream<ResultA_,ResultB_,ResultC_,ResultD_> groupBy(BiConstraintCollector<A,B,ResultContainerA_,ResultA_> collectorA,
                                                                                                                                                                                                                                                   BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB,
                                                                                                                                                                                                                                                   BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC,
                                                                                                                                                                                                                                                   BiConstraintCollector<A,B,ResultContainerD_,ResultD_> collectorD)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a QuadConstraintStream, containing only a single tuple, the result of applying four BiConstraintCollectors.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    ResultContainerA_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultA_ - the type of the first fact in the destination QuadConstraintStream's tuple
    
    ResultContainerB_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultB_ - the type of the second fact in the destination QuadConstraintStream's tuple
    
    ResultContainerC_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultC_ - the type of the third fact in the destination QuadConstraintStream's tuple
    
    ResultContainerD_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultD_ - the type of the fourth fact in the destination QuadConstraintStream's tuple
    
    Parameters:
    
    collectorA - never null, the collector to perform the first grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorB - never null, the collector to perform the second grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorC - never null, the collector to perform the third grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorD - never null, the collector to perform the fourth grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKey_> UniConstraintStream<GroupKey_> groupBy(BiFunction<A,B,GroupKey_> groupKeyMapping)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a UniConstraintStream, containing the set of tuples resulting from applying the group key mapping function on all tuples of the original stream. Neither tuple of the new stream Objects.equals(Object, Object) any other.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKey_ - the type of a fact in the destination UniConstraintStream's tuple
    
    Parameters:
    
    groupKeyMapping - never null, mapping function to convert each element in the stream to a different element
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKey_,__,Result_> BiConstraintStream<GroupKey_,Result_> groupBy(BiFunction<A,B,GroupKey_> groupKeyMapping,
                                                                                              BiConstraintCollector<A,B,__,Result_> collector)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a different BiConstraintStream, consisting of unique tuples.
    The first fact is the return value of the group key mapping function, applied on the incoming tuple. The second fact is the return value of a given BiConstraintCollector applied on all incoming tuples with the same first fact.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKey_ - the type of the first fact in the destination BiConstraintStream's tuple
    
    __ - the mutable accumulation type (often hidden as an implementation detail)
    
    Result_ - the type of the second fact in the destination BiConstraintStream's tuple
    
    Parameters:
    
    groupKeyMapping - never null, function to convert the fact in the original tuple to a different fact
    
    collector - never null, the collector to perform the grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKey_,ResultContainerB_,ResultB_,ResultContainerC_,ResultC_> TriConstraintStream<GroupKey_,ResultB_,ResultC_> groupBy(BiFunction<A,B,GroupKey_> groupKeyMapping,
                                                                                                                                                                      BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB,
                                                                                                                                                                      BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a TriConstraintStream, consisting of unique tuples with three facts.
    The first fact is the return value of the group key mapping function, applied on the incoming tuple. The remaining facts are the return value of the respective BiConstraintCollector applied on all incoming tuples with the same first fact.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKey_ - the type of the first fact in the destination TriConstraintStream's tuple
    
    ResultContainerB_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultB_ - the type of the second fact in the destination TriConstraintStream's tuple
    
    ResultContainerC_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultC_ - the type of the third fact in the destination TriConstraintStream's tuple
    
    Parameters:
    
    groupKeyMapping - never null, function to convert the fact in the original tuple to a different fact
    
    collectorB - never null, the collector to perform the first grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorC - never null, the collector to perform the second grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKey_,ResultContainerB_,ResultB_,ResultContainerC_,ResultC_,ResultContainerD_,ResultD_> QuadConstraintStream<GroupKey_,ResultB_,ResultC_,ResultD_> groupBy(BiFunction<A,B,GroupKey_> groupKeyMapping,
                                                                                                                                                                                                                             BiConstraintCollector<A,B,ResultContainerB_,ResultB_> collectorB,
                                                                                                                                                                                                                             BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC,
                                                                                                                                                                                                                             BiConstraintCollector<A,B,ResultContainerD_,ResultD_> collectorD)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a QuadConstraintStream, consisting of unique tuples with four facts.
    The first fact is the return value of the group key mapping function, applied on the incoming tuple. The remaining facts are the return value of the respective BiConstraintCollector applied on all incoming tuples with the same first fact.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKey_ - the type of the first fact in the destination QuadConstraintStream's tuple
    
    ResultContainerB_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultB_ - the type of the second fact in the destination QuadConstraintStream's tuple
    
    ResultContainerC_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultC_ - the type of the third fact in the destination QuadConstraintStream's tuple
    
    ResultContainerD_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultD_ - the type of the fourth fact in the destination QuadConstraintStream's tuple
    
    Parameters:
    
    groupKeyMapping - never null, function to convert the fact in the original tuple to a different fact
    
    collectorB - never null, the collector to perform the first grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorC - never null, the collector to perform the second grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorD - never null, the collector to perform the third grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKeyA_,GroupKeyB_> BiConstraintStream<GroupKeyA_,GroupKeyB_> groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping,
                                                                                             BiFunction<A,B,GroupKeyB_> groupKeyBMapping)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a different BiConstraintStream, consisting of unique tuples.
    The first fact is the return value of the first group key mapping function, applied on the incoming tuple. The second fact is the return value of the second group key mapping function, applied on all incoming tuples with the same first fact.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKeyA_ - the type of the first fact in the destination BiConstraintStream's tuple
    
    GroupKeyB_ - the type of the second fact in the destination BiConstraintStream's tuple
    
    Parameters:
    
    groupKeyAMapping - never null, function to convert the facts in the original tuple to a new fact
    
    groupKeyBMapping - never null, function to convert the facts in the original tuple to another new fact
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKeyA_,GroupKeyB_,ResultContainer_,Result_> TriConstraintStream<GroupKeyA_,GroupKeyB_,Result_> groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping,
                                                                                                                                                 BiFunction<A,B,GroupKeyB_> groupKeyBMapping,
                                                                                                                                                 BiConstraintCollector<A,B,ResultContainer_,Result_> collector)
```
    Description copied from interface: BiConstraintStream
    
    Combines the semantics of BiConstraintStream.groupBy(BiFunction, BiFunction) and BiConstraintStream.groupBy(BiConstraintCollector). That is, the first and second facts in the tuple follow the BiConstraintStream.groupBy(BiFunction, BiFunction) semantics, and the third fact is the result of applying BiConstraintCollector.finisher() on all the tuples of the original UniConstraintStream that belong to the group.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKeyA_ - the type of the first fact in the destination TriConstraintStream's tuple
    
    GroupKeyB_ - the type of the second fact in the destination TriConstraintStream's tuple
    
    ResultContainer_ - the mutable accumulation type (often hidden as an implementation detail)
    
    Result_ - the type of the third fact in the destination TriConstraintStream's tuple
    
    Parameters:
    
    groupKeyAMapping - never null, function to convert the original tuple into a first fact
    
    groupKeyBMapping - never null, function to convert the original tuple into a second fact
    
    collector - never null, the collector to perform the grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKeyA_,GroupKeyB_,ResultContainerC_,ResultC_,ResultContainerD_,ResultD_> QuadConstraintStream<GroupKeyA_,GroupKeyB_,ResultC_,ResultD_> groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping,
                                                                                                                                                                                                           BiFunction<A,B,GroupKeyB_> groupKeyBMapping,
                                                                                                                                                                                                           BiConstraintCollector<A,B,ResultContainerC_,ResultC_> collectorC,
                                                                                                                                                                                                           BiConstraintCollector<A,B,ResultContainerD_,ResultD_> collectorD)
```
    Description copied from interface: BiConstraintStream
    
    Combines the semantics of BiConstraintStream.groupBy(BiFunction, BiFunction) and BiConstraintStream.groupBy(BiConstraintCollector). That is, the first and second facts in the tuple follow the BiConstraintStream.groupBy(BiFunction, BiFunction) semantics. The third fact is the result of applying the first BiConstraintCollector.finisher() on all the tuples of the original BiConstraintStream that belong to the group. The fourth fact is the result of applying the second BiConstraintCollector.finisher() on all the tuples of the original BiConstraintStream that belong to the group
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKeyA_ - the type of the first fact in the destination QuadConstraintStream's tuple
    
    GroupKeyB_ - the type of the second fact in the destination QuadConstraintStream's tuple
    
    ResultContainerC_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultC_ - the type of the third fact in the destination QuadConstraintStream's tuple
    
    ResultContainerD_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultD_ - the type of the fourth fact in the destination QuadConstraintStream's tuple
    
    Parameters:
    
    groupKeyAMapping - never null, function to convert the original tuple into a first fact
    
    groupKeyBMapping - never null, function to convert the original tuple into a second fact
    
    collectorC - never null, the collector to perform the first grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    collectorD - never null, the collector to perform the second grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKeyA_,GroupKeyB_,GroupKeyC_> TriConstraintStream<GroupKeyA_,GroupKeyB_,GroupKeyC_> groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping,
                                                                                                                                BiFunction<A,B,GroupKeyB_> groupKeyBMapping,
                                                                                                                                BiFunction<A,B,GroupKeyC_> groupKeyCMapping)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a TriConstraintStream, consisting of unique tuples with three facts.
    The first fact is the return value of the first group key mapping function, applied on the incoming tuple. The second fact is the return value of the second group key mapping function, applied on all incoming tuples with the same first fact. The third fact is the return value of the third group key mapping function, applied on all incoming tuples with the same first fact.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKeyA_ - the type of the first fact in the destination TriConstraintStream's tuple
    
    GroupKeyB_ - the type of the second fact in the destination TriConstraintStream's tuple
    
    GroupKeyC_ - the type of the third fact in the destination TriConstraintStream's tuple
    
    Parameters:
    
    groupKeyAMapping - never null, function to convert the original tuple into a first fact
    
    groupKeyBMapping - never null, function to convert the original tuple into a second fact
    
    groupKeyCMapping - never null, function to convert the original tuple into a third fact
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKeyA_,GroupKeyB_,GroupKeyC_,ResultContainerD_,ResultD_> QuadConstraintStream<GroupKeyA_,GroupKeyB_,GroupKeyC_,ResultD_> groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping,
                                                                                                                                                                                       BiFunction<A,B,GroupKeyB_> groupKeyBMapping,
                                                                                                                                                                                       BiFunction<A,B,GroupKeyC_> groupKeyCMapping,
                                                                                                                                                                                       BiConstraintCollector<A,B,ResultContainerD_,ResultD_> collectorD)
```
    Description copied from interface: BiConstraintStream
    
    Combines the semantics of BiConstraintStream.groupBy(BiFunction, BiFunction) and BiConstraintStream.groupBy(BiConstraintCollector). That is, the first three facts in the tuple follow the BiConstraintStream.groupBy(BiFunction, BiFunction) semantics. The final fact is the result of applying the first BiConstraintCollector.finisher() on all the tuples of the original BiConstraintStream that belong to the group.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKeyA_ - the type of the first fact in the destination QuadConstraintStream's tuple
    
    GroupKeyB_ - the type of the second fact in the destination QuadConstraintStream's tuple
    
    GroupKeyC_ - the type of the third fact in the destination QuadConstraintStream's tuple
    
    ResultContainerD_ - the mutable accumulation type (often hidden as an implementation detail)
    
    ResultD_ - the type of the fourth fact in the destination QuadConstraintStream's tuple
    
    Parameters:
    
    groupKeyAMapping - never null, function to convert the original tuple into a first fact
    
    groupKeyBMapping - never null, function to convert the original tuple into a second fact
    
    groupKeyCMapping - never null, function to convert the original tuple into a third fact
    
    collectorD - never null, the collector to perform the grouping operation with See ConstraintCollectors for common operations, such as count(), sum() and others.
    
    Returns:
    
    never null
  - groupBy
```
public <GroupKeyA_,GroupKeyB_,GroupKeyC_,GroupKeyD_> QuadConstraintStream<GroupKeyA_,GroupKeyB_,GroupKeyC_,GroupKeyD_> groupBy(BiFunction<A,B,GroupKeyA_> groupKeyAMapping,
                                                                                                                                                                   BiFunction<A,B,GroupKeyB_> groupKeyBMapping,
                                                                                                                                                                   BiFunction<A,B,GroupKeyC_> groupKeyCMapping,
                                                                                                                                                                   BiFunction<A,B,GroupKeyD_> groupKeyDMapping)
```
    Description copied from interface: BiConstraintStream
    
    Convert the BiConstraintStream to a QuadConstraintStream, consisting of unique tuples with four facts.
    The first fact is the return value of the first group key mapping function, applied on the incoming tuple. The second fact is the return value of the second group key mapping function, applied on all incoming tuples with the same first fact. The third fact is the return value of the third group key mapping function, applied on all incoming tuples with the same first fact. The fourth fact is the return value of the fourth group key mapping function, applied on all incoming tuples with the same first fact.
    
    Specified by:
    
    groupBy in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    GroupKeyA_ - the type of the first fact in the destination QuadConstraintStream's tuple
    
    GroupKeyB_ - the type of the second fact in the destination QuadConstraintStream's tuple
    
    GroupKeyC_ - the type of the third fact in the destination QuadConstraintStream's tuple
    
    GroupKeyD_ - the type of the fourth fact in the destination QuadConstraintStream's tuple
    
    Parameters:
    
    groupKeyAMapping - never null, function to convert the original tuple into a first fact
    
    groupKeyBMapping - never null, function to convert the original tuple into a second fact
    
    groupKeyCMapping - never null, function to convert the original tuple into a third fact
    
    groupKeyDMapping - never null, function to convert the original tuple into a fourth fact
    
    Returns:
    
    never null
  - map
```
public <ResultA_> UniConstraintStream<ResultA_> map(BiFunction<A,B,ResultA_> mapping)
```
    Description copied from interface: BiConstraintStream
    
    As defined by UniConstraintStream.map(Function).
    
    Specified by:
    
    map in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    ResultA_ - the type of the only fact in the resulting UniConstraintStream's tuple
    
    Parameters:
    
    mapping - never null, function to convert the original tuple into the new tuple
    
    Returns:
    
    never null
  - flattenLast
```
public <ResultB_> BiConstraintStream<A,ResultB_> flattenLast(Function<B,Iterable<ResultB_>> mapping)
```
    Description copied from interface: BiConstraintStream
    
    Takes each tuple and applies a mapping on the last fact, which turns it into Iterable. Returns a constraint stream consisting of tuples of the first fact and the contents of the Iterable one after another. In other words, it will replace the current tuple with new tuples, a cartesian product of A and the individual items from the Iterable.
    This may produce a stream with duplicate tuples. See BiConstraintStream.distinct() for details.
    In cases where the last fact is already Iterable, use Function.identity() as the argument.
    Simple example: assuming a constraint stream of (PersonName, Person) [(Ann, (name = Ann, roles = [USER, ADMIN])), (Beth, (name = Beth, roles = [USER])), (Cathy, (name = Cathy, roles = [ADMIN, AUDITOR]))], calling flattenLast(Person::getRoles) on such stream will produce a stream of [(Ann, USER), (Ann, ADMIN), (Beth, USER), (Cathy, ADMIN), (Cathy, AUDITOR)].
    
    Specified by:
    
    flattenLast in interface BiConstraintStream<Solution_,A>
    
    Type Parameters:
    
    ResultB_ - the type of the last fact in the resulting tuples
    
    Parameters:
    
    mapping - never null, function to convert the last fact in the original tuple into Iterable
    
    Returns:
    
    never null
  - impactScore
```
public final Constraint impactScore(String constraintPackage,
                                    String constraintName,
                                    Score<?> constraintWeight,
                                    ScoreImpactType impactType)
```
    Specified by:
    
    impactScore in class AbstractConstraintStream<Solution_>
  - impactScore
```
public final Constraint impactScore(String constraintPackage,
                                    String constraintName,
                                    Score<?> constraintWeight,
                                    ToIntBiFunction<A,B> matchWeigher,
                                    ScoreImpactType impactType)
```
    Specified by:
    
    impactScore in interface InnerBiConstraintStream<Solution_,A>
  - impactScoreLong
```
public final Constraint impactScoreLong(String constraintPackage,
                                        String constraintName,
                                        Score<?> constraintWeight,
                                        ToLongBiFunction<A,B> matchWeigher,
                                        ScoreImpactType impactType)
```
    Specified by:
    
    impactScoreLong in interface InnerBiConstraintStream<Solution_,A>
  - impactScoreBigDecimal
```
public final Constraint impactScoreBigDecimal(String constraintPackage,
                                              String constraintName,
                                              Score<?> constraintWeight,
                                              BiFunction<A,B,BigDecimal> matchWeigher,
                                              ScoreImpactType impactType)
```
    Specified by:
    
    impactScoreBigDecimal in interface InnerBiConstraintStream<Solution_,A>
  - impactScoreConfigurable
```
public final Constraint impactScoreConfigurable(String constraintPackage,
                                                String constraintName,
                                                ScoreImpactType impactType)
```
    Specified by:
    
    impactScoreConfigurable in class AbstractConstraintStream<Solution_>
  - impactScoreConfigurable
```
public final Constraint impactScoreConfigurable(String constraintPackage,
                                                String constraintName,
                                                ToIntBiFunction<A,B> matchWeigher,
                                                ScoreImpactType impactType)
```
    Specified by:
    
    impactScoreConfigurable in interface InnerBiConstraintStream<Solution_,A>
  - impactScoreConfigurableLong
```
public final Constraint impactScoreConfigurableLong(String constraintPackage,
                                                    String constraintName,
                                                    ToLongBiFunction<A,B> matchWeigher,
                                                    ScoreImpactType impactType)
```
    Specified by:
    
    impactScoreConfigurableLong in interface InnerBiConstraintStream<Solution_,A>
  - impactScoreConfigurableBigDecimal
```
public final Constraint impactScoreConfigurableBigDecimal(String constraintPackage,
                                                          String constraintName,
                                                          BiFunction<A,B,BigDecimal> matchWeigher,
                                                          ScoreImpactType impactType)
```
    Specified by:
    
    impactScoreConfigurableBigDecimal in interface InnerBiConstraintStream<Solution_,A>
  - getLeftHandSide
```
public abstract BiLeftHandSide<A,B> getLeftHandSide()
```

Class DroolsAbstractBiConstraintStream<Solution_,​A,​B>

Field Summary

Fields inherited from class org.optaplanner.core.impl.score.stream.drools.common.DroolsAbstractConstraintStream

Constructor Summary

Method Summary

Methods inherited from class org.optaplanner.core.impl.score.stream.drools.common.DroolsAbstractConstraintStream

Methods inherited from class org.optaplanner.core.impl.score.stream.common.AbstractConstraintStream

Methods inherited from class java.lang.Object

Methods inherited from interface org.optaplanner.core.api.score.stream.bi.BiConstraintStream

Methods inherited from interface org.optaplanner.core.api.score.stream.ConstraintStream

Methods inherited from interface org.optaplanner.core.impl.score.stream.bi.InnerBiConstraintStream

Constructor Detail

DroolsAbstractBiConstraintStream

Method Detail

filter

join

join

ifExists

ifExistsIncludingNullVars

ifNotExists

ifNotExistsIncludingNullVars

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

map

flattenLast

impactScore

impactScore

impactScoreLong

impactScoreBigDecimal

impactScoreConfigurable

impactScoreConfigurable

impactScoreConfigurableLong

impactScoreConfigurableBigDecimal

getLeftHandSide

Class DroolsAbstractBiConstraintStream<Solution_,A,B>