OptaPlanner core 6.2.0.Beta1

org.optaplanner.core.impl.heuristic.selector.entity.decorator
Class FilteringEntitySelector

java.lang.Object
  extended by org.optaplanner.core.impl.heuristic.selector.AbstractSelector
      extended by org.optaplanner.core.impl.heuristic.selector.entity.AbstractEntitySelector
          extended by org.optaplanner.core.impl.heuristic.selector.entity.decorator.FilteringEntitySelector
All Implemented Interfaces:
Iterable<Object>, EventListener, ListIterable<Object>, EntitySelector, IterableSelector<Object>, ListIterableSelector<Object>, Selector, PhaseLifecycleListener, SolverLifecycleListener

public class FilteringEntitySelector
extends AbstractEntitySelector


Field Summary
protected  boolean bailOutEnabled
           
protected  EntitySelector childEntitySelector
           
protected  List<SelectionFilter> filterList
           
protected  ScoreDirector scoreDirector
           
 
Fields inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
logger, phaseLifecycleSupport, workingRandom
 
Constructor Summary
FilteringEntitySelector(EntitySelector childEntitySelector, List<SelectionFilter> filterList)
           
 
Method Summary
protected  long determineBailOutSize()
           
 Iterator<Object> endingIterator()
          If Selector.isNeverEnding() is true, then Iterable.iterator() will never end.
 EntityDescriptor getEntityDescriptor()
           
 long getSize()
          A random JIT Selector with Selector.isNeverEnding() true should return a size as if it would be able to return each distinct element only once, because the size can be used in SelectionProbabilityWeightFactory.
 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()
           
 ListIterator<Object> listIterator()
          See List.listIterator()
 ListIterator<Object> listIterator(int index)
          See List.listIterator()
 void phaseEnded(AbstractPhaseScope phaseScope)
           
 void phaseStarted(AbstractPhaseScope phaseScope)
           
 String toString()
           
 
Methods inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
getCacheType, solvingEnded, solvingStarted, stepEnded, stepStarted
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.optaplanner.core.impl.heuristic.selector.Selector
getCacheType
 
Methods inherited from interface org.optaplanner.core.impl.phase.event.PhaseLifecycleListener
stepEnded, stepStarted
 
Methods inherited from interface org.optaplanner.core.impl.solver.event.SolverLifecycleListener
solvingEnded, solvingStarted
 

Field Detail

childEntitySelector

protected final EntitySelector childEntitySelector

filterList

protected final List<SelectionFilter> filterList

bailOutEnabled

protected final boolean bailOutEnabled

scoreDirector

protected ScoreDirector scoreDirector
Constructor Detail

FilteringEntitySelector

public FilteringEntitySelector(EntitySelector childEntitySelector,
                               List<SelectionFilter> filterList)
Method Detail

phaseStarted

public void phaseStarted(AbstractPhaseScope phaseScope)
Specified by:
phaseStarted in interface PhaseLifecycleListener
Overrides:
phaseStarted in class AbstractSelector

phaseEnded

public void phaseEnded(AbstractPhaseScope phaseScope)
Specified by:
phaseEnded in interface PhaseLifecycleListener
Overrides:
phaseEnded in class AbstractSelector

getEntityDescriptor

public EntityDescriptor getEntityDescriptor()
Returns:
never null

isCountable

public boolean isCountable()
Description copied from interface: Selector
If false, then Selector.isNeverEnding() is true.

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).

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()
Description copied from interface: IterableSelector
A random JIT Selector with Selector.isNeverEnding() true should return a size as if it would be able to return each distinct element only once, because the size can be used in SelectionProbabilityWeightFactory.

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

iterator

public Iterator<Object> iterator()

determineBailOutSize

protected long determineBailOutSize()

listIterator

public ListIterator<Object> listIterator()
Description copied from interface: ListIterable
See List.listIterator()

Returns:
never null, see List.listIterator().

listIterator

public ListIterator<Object> listIterator(int index)
Description copied from interface: ListIterable
See List.listIterator()

Parameters:
index - lower than the size of this ListIterable, see List.listIterator(int).
Returns:
never null, see List.listIterator(int).

endingIterator

public Iterator<Object> endingIterator()
Description copied from interface: EntitySelector
If Selector.isNeverEnding() is true, then Iterable.iterator() will never end. This returns an ending Iterator, that tries to match Iterable.iterator() as much as possible, but return each distinct element only once and therefore it might not respect the configuration of this EntitySelector entirely.

Returns:
never null
See Also:
Iterable.iterator()

toString

public String toString()
Overrides:
toString in class Object

OptaPlanner core 6.2.0.Beta1

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