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

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
              org.drools.planner.core.heuristic.selector.value.decorator.CachingValueSelector

All Implemented Interfaces:

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

public class CachingValueSelector
extends AbstractCachingValueSelector

A ValueSelector that caches the result of its child ValueSelector.

Keep this code in sync with CachingEntitySelector and CachingMoveSelector.

Field Summary

protected boolean

randomSelection

Fields inherited from class org.drools.planner.core.heuristic.selector.value.decorator.AbstractCachingValueSelector

cachedValueList, cacheType, childValueSelector

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

logger, solverPhaseLifecycleSupport, workingRandom

Constructor Summary

CachingValueSelector(ValueSelector childValueSelector, SelectionCacheType cacheType, boolean randomSelection)

Method Summary

boolean	isNeverEnding() Is true if Selector.isContinuous() is true or if this selector is in random order (for most cases).
ValueIterator	iterator()
String	toString()

Methods inherited from class org.drools.planner.core.heuristic.selector.value.decorator.AbstractCachingValueSelector

constructCache, disposeCache, getChildValueSelector, getSize, getVariableDescriptor, isContinuous

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, wait, wait, wait

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

randomSelection

protected final boolean randomSelection

Constructor Detail

CachingValueSelector

public CachingValueSelector(ValueSelector childValueSelector,
                            SelectionCacheType cacheType,
                            boolean randomSelection)

Method Detail

isNeverEnding

public boolean isNeverEnding()

Description copied from interface: Selector

Is true if Selector.isContinuous() is true 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.

iterator

public ValueIterator iterator()

toString

public String toString()

Overrides:

toString in class Object