org.optaplanner.core.impl.heuristic.selector.move.factory
Class MoveListFactoryToMoveSelectorBridge

java.lang.Object
  org.optaplanner.core.impl.heuristic.selector.AbstractSelector
      org.optaplanner.core.impl.heuristic.selector.move.AbstractMoveSelector
          org.optaplanner.core.impl.heuristic.selector.move.factory.MoveListFactoryToMoveSelectorBridge

All Implemented Interfaces:

Iterable<Move>, EventListener, SelectionCacheLifecycleListener, IterableSelector<Move>, MoveSelector, Selector, PhaseLifecycleListener, SolverLifecycleListener

public class MoveListFactoryToMoveSelectorBridge
extends AbstractMoveSelector
implements SelectionCacheLifecycleListener

Bridges a MoveListFactory to a MoveSelector.

Field Summary

protected List<Move>	cachedMoveList
protected SelectionCacheType	cacheType
protected MoveListFactory	moveListFactory
protected boolean	randomSelection

Fields inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector

logger, phaseLifecycleSupport, workingRandom

Constructor Summary

MoveListFactoryToMoveSelectorBridge(MoveListFactory moveListFactory, SelectionCacheType cacheType, boolean randomSelection)

Method Summary

void	constructCache(DefaultSolverScope solverScope)
void	disposeCache(DefaultSolverScope solverScope)
SelectionCacheType	getCacheType() Unless this selector itself caches, this returns SelectionCacheType.JUST_IN_TIME, even if a selector child caches.
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<Move>	iterator()
String	toString()

Methods inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector

phaseEnded, phaseStarted, 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.phase.event.PhaseLifecycleListener

phaseEnded, phaseStarted, stepEnded, stepStarted

Methods inherited from interface org.optaplanner.core.impl.solver.event.SolverLifecycleListener

solvingEnded, solvingStarted

Field Detail

moveListFactory

protected final MoveListFactory moveListFactory

cacheType

protected final SelectionCacheType cacheType

randomSelection

protected final boolean randomSelection

cachedMoveList

protected List<Move> cachedMoveList

Constructor Detail

MoveListFactoryToMoveSelectorBridge

public MoveListFactoryToMoveSelectorBridge(MoveListFactory moveListFactory,
                                           SelectionCacheType cacheType,
                                           boolean randomSelection)

Method Detail

getCacheType

public SelectionCacheType getCacheType()

Description copied from interface: Selector

Unless this selector itself caches, this returns SelectionCacheType.JUST_IN_TIME, even if a selector child caches.

Specified by:

getCacheType in interface Selector

Overrides:

getCacheType in class AbstractSelector

Returns:

never null

constructCache

public void constructCache(DefaultSolverScope solverScope)

Specified by:

constructCache in interface SelectionCacheLifecycleListener

disposeCache

public void disposeCache(DefaultSolverScope solverScope)

Specified by:

disposeCache in interface SelectionCacheLifecycleListener

isCountable

public boolean isCountable()

Description copied from interface: Selector

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

Specified by:

isCountable in interface Selector

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

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.

Specified by:

getSize in interface IterableSelector<Move>

Returns:

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

iterator

public Iterator<Move> iterator()

Specified by:

iterator in interface Iterable<Move>

toString

public String toString()

Overrides:

toString in class Object