org.drools.planner.core.heuristic.selector.value.decorator
Class AbstractCachingValueSelector

java.lang.Object
  org.drools.planner.core.heuristic.selector.AbstractSelector
      org.drools.planner.core.heuristic.selector.value.AbstractValueSelector
          org.drools.planner.core.heuristic.selector.value.decorator.AbstractCachingValueSelector

All Implemented Interfaces:

Iterable<Object>, EventListener, SelectionCacheLifecycleListener, Selector, ValueSelector, SolverPhaseLifecycleListener, SolverLifecycleListener

Direct Known Subclasses:

CachingValueSelector, ShufflingValueSelector

public abstract class AbstractCachingValueSelector
extends AbstractValueSelector
implements SelectionCacheLifecycleListener

Field Summary

protected List<Object>	cachedValueList
protected SelectionCacheType	cacheType
protected ValueSelector	childValueSelector

Fields inherited from class org.drools.planner.core.heuristic.selector.AbstractSelector

logger, solverPhaseLifecycleSupport, workingRandom

Constructor Summary

AbstractCachingValueSelector(ValueSelector childValueSelector, SelectionCacheType cacheType)

Method Summary

void	constructCache(DefaultSolverScope solverScope)
void	disposeCache(DefaultSolverScope solverScope)
ValueSelector	getChildValueSelector()
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.
PlanningVariableDescriptor	getVariableDescriptor()
boolean	isContinuous() If true, then Selector.isNeverEnding() is also true.

Methods inherited from class org.drools.planner.core.heuristic.selector.AbstractSelector

phaseEnded, phaseStarted, solvingEnded, solvingStarted, stepEnded, stepStarted

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.drools.planner.core.heuristic.selector.value.ValueSelector

iterator

Methods inherited from interface org.drools.planner.core.heuristic.selector.Selector

isNeverEnding

Methods inherited from interface org.drools.planner.core.phase.event.SolverPhaseLifecycleListener

phaseEnded, phaseStarted, stepEnded, stepStarted

Methods inherited from interface org.drools.planner.core.solver.event.SolverLifecycleListener

solvingEnded, solvingStarted

Field Detail

childValueSelector

protected final ValueSelector childValueSelector

cacheType

protected final SelectionCacheType cacheType

cachedValueList

protected List<Object> cachedValueList

Constructor Detail

AbstractCachingValueSelector

public AbstractCachingValueSelector(ValueSelector childValueSelector,
                                    SelectionCacheType cacheType)

Method Detail

getChildValueSelector

public ValueSelector getChildValueSelector()

constructCache

public void constructCache(DefaultSolverScope solverScope)

Specified by:

constructCache in interface SelectionCacheLifecycleListener

disposeCache

public void disposeCache(DefaultSolverScope solverScope)

Specified by:

disposeCache in interface SelectionCacheLifecycleListener

getVariableDescriptor

public PlanningVariableDescriptor getVariableDescriptor()

Specified by:

getVariableDescriptor in interface ValueSelector

Returns:

never null

isContinuous

public boolean isContinuous()

Description copied from interface: Selector

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

Specified by:

isContinuous in interface Selector

Returns:

true if any of the value ranges are continuous (as in for example every double value between 1.2 and 1.4)

getSize

public long getSize()

Description copied from interface: Selector

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 Selector

Returns:

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