Package ai.timefold.solver.core.impl.heuristic.selector.value.decorator

Class FilteringValueSelector<Solution_>

java.lang.Object

ai.timefold.solver.core.impl.heuristic.selector.AbstractSelector<Solution_>

ai.timefold.solver.core.impl.heuristic.selector.AbstractDemandEnabledSelector<Solution_>

ai.timefold.solver.core.impl.heuristic.selector.value.decorator.FilteringValueSelector<Solution_>

All Implemented Interfaces:

Selector<Solution_>, ValueSelector<Solution_>, PhaseLifecycleListener<Solution_>, SolverLifecycleListener<Solution_>, EventListener

Direct Known Subclasses:

EntityIndependentFilteringValueSelector

public class FilteringValueSelector<Solution_>
extends AbstractDemandEnabledSelector<Solution_>
implements ValueSelector<Solution_>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	FilteringValueSelector.JustInTimeFilteringValueIterator

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	bailOutEnabled
protected ValueSelector<Solution_>	childValueSelector

Fields inherited from class ai.timefold.solver.core.impl.heuristic.selector.AbstractSelector

logger, phaseLifecycleSupport, workingRandom

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FilteringValueSelector(ValueSelector<Solution_> childValueSelector, List<SelectionFilter<Solution_,Object>> filterList)

Method Summary

Modifier and Type	Method	Description
static <Solution_> ValueSelector<Solution_>	create(ValueSelector<Solution_> valueSelector, List<SelectionFilter<Solution_,Object>> filterList)
protected long	determineBailOutSize(Object entity)
Iterator<Object>	endingIterator(Object entity)	If Selector.isNeverEnding() is true, then ValueSelector.iterator(Object) will never end.
boolean	equals(Object o)
long	getSize(Object entity)	Similar to IterableSelector.getSize(), but requires an entity.
GenuineVariableDescriptor<Solution_>	getVariableDescriptor()
int	hashCode()
boolean	isCountable()	If false, then Selector.isNeverEnding() is true.
boolean	isNeverEnding()	Is true if Selector.isCountable() is false or if this selector is in random order (for most cases).
Iterator<Object>	iterator(Object entity)	Similar to Iterable.iterator(), but requires an entity.
void	phaseEnded(AbstractPhaseScope<Solution_> phaseScope)
void	phaseStarted(AbstractPhaseScope<Solution_> phaseScope)
String	toString()

Methods inherited from class ai.timefold.solver.core.impl.heuristic.selector.AbstractSelector

getCacheType, solvingEnded, solvingStarted, stepEnded, stepStarted

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface ai.timefold.solver.core.impl.phase.event.PhaseLifecycleListener

stepEnded, stepStarted

Methods inherited from interface ai.timefold.solver.core.impl.heuristic.selector.Selector

getCacheType

Methods inherited from interface ai.timefold.solver.core.impl.solver.event.SolverLifecycleListener

solvingEnded, solvingError, solvingStarted

Field Detail

childValueSelector

protected final ValueSelector<Solution_> childValueSelector

bailOutEnabled

protected final boolean bailOutEnabled

Constructor Detail

FilteringValueSelector

protected FilteringValueSelector(ValueSelector<Solution_> childValueSelector,
                                 List<SelectionFilter<Solution_,Object>> filterList)

Method Detail

create

public static <Solution_> ValueSelector<Solution_> create(ValueSelector<Solution_> valueSelector,
                                                          List<SelectionFilter<Solution_,Object>> filterList)

phaseStarted

public void phaseStarted(AbstractPhaseScope<Solution_> phaseScope)

Specified by:

phaseStarted in interface PhaseLifecycleListener<Solution_>

Overrides:

phaseStarted in class AbstractSelector<Solution_>

phaseEnded

public void phaseEnded(AbstractPhaseScope<Solution_> phaseScope)

Specified by:

phaseEnded in interface PhaseLifecycleListener<Solution_>

Overrides:

phaseEnded in class AbstractSelector<Solution_>

getVariableDescriptor

public GenuineVariableDescriptor<Solution_> getVariableDescriptor()

Specified by:

getVariableDescriptor in interface ValueSelector<Solution_>

Returns:

never null

isCountable

public boolean isCountable()

Description copied from interface: Selector

If false, then Selector.isNeverEnding() is true.

Specified by:

isCountable in interface Selector<Solution_>

Returns:

true if all the ValueRanges are countable (for example a double value range between 1.2 and 1.4 is not countable)

isNeverEnding

public boolean isNeverEnding()

Description copied from interface: Selector

Is true if Selector.isCountable() is false or if this selector is in random order (for most cases). Is never true when this selector is in shuffled order (which is less scalable but more exact).

Specified by:

isNeverEnding in interface Selector<Solution_>

Returns:

true if the Iterator.hasNext() of the Iterator created by Iterable.iterator() never returns false (except when it's empty).

getSize

public long getSize(Object entity)

Description copied from interface: ValueSelector

Similar to IterableSelector.getSize(), but requires an entity.

Specified by:

getSize in interface ValueSelector<Solution_>

Parameters:

entity - never null

Returns:

the approximate number of elements generated by this Selector, always >= 0

iterator

public Iterator<Object> iterator(Object entity)

Description copied from interface: ValueSelector

Similar to Iterable.iterator(), but requires an entity.

Specified by:

iterator in interface ValueSelector<Solution_>

Parameters:

entity - never null

Returns:

never null

endingIterator

public Iterator<Object> endingIterator(Object entity)

Description copied from interface: ValueSelector

If Selector.isNeverEnding() is true, then ValueSelector.iterator(Object) will never end. This returns an ending Iterator, that tries to match ValueSelector.iterator(Object) as much as possible, but return each distinct element only once and therefore it might not respect the configuration of this ValueSelector entirely.

Specified by:

endingIterator in interface ValueSelector<Solution_>

Parameters:

entity - never null

Returns:

never null

See Also:

ValueSelector.iterator(Object)

determineBailOutSize

protected long determineBailOutSize(Object entity)

equals

public boolean equals(Object o)

Specified by:

equals in class AbstractDemandEnabledSelector<Solution_>

hashCode

public int hashCode()

Specified by:

hashCode in class AbstractDemandEnabledSelector<Solution_>

toString

public String toString()

Overrides:

toString in class Object