Class RandomSubListSelector<Solution_>
- java.lang.Object
-
- org.optaplanner.core.impl.heuristic.selector.AbstractSelector<Solution_>
-
- org.optaplanner.core.impl.heuristic.selector.move.generic.list.RandomSubListSelector<Solution_>
-
- All Implemented Interfaces:
Iterable<SubList>
,EventListener
,IterableSelector<Solution_,SubList>
,Selector<Solution_>
,PhaseLifecycleListener<Solution_>
,SolverLifecycleListener<Solution_>
public class RandomSubListSelector<Solution_> extends AbstractSelector<Solution_> implements IterableSelector<Solution_,SubList>
-
-
Field Summary
-
Fields inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
logger, phaseLifecycleSupport, workingRandom
-
-
Constructor Summary
Constructors Constructor Description RandomSubListSelector(ListVariableDescriptor<Solution_> listVariableDescriptor, EntitySelector<Solution_> entitySelector, EntityIndependentValueSelector<Solution_> valueSelector, int minimumSubListSize, int maximumSubListSize)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description long
getSize()
A random JITSelector
withSelector.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 inSelectionProbabilityWeightFactory
.boolean
isCountable()
If false, thenSelector.isNeverEnding()
is true.boolean
isNeverEnding()
Is true ifSelector.isCountable()
is false or if this selector is in random order (for most cases).Iterator<SubList>
iterator()
void
solvingEnded(SolverScope<Solution_> solverScope)
void
solvingStarted(SolverScope<Solution_> solverScope)
String
toString()
-
Methods inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
getCacheType, phaseEnded, phaseStarted, 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.IterableSelector
spliterator
-
Methods inherited from interface org.optaplanner.core.impl.phase.event.PhaseLifecycleListener
phaseEnded, phaseStarted, stepEnded, stepStarted
-
Methods inherited from interface org.optaplanner.core.impl.heuristic.selector.Selector
getCacheType
-
Methods inherited from interface org.optaplanner.core.impl.solver.event.SolverLifecycleListener
solvingError
-
-
-
-
Constructor Detail
-
RandomSubListSelector
public RandomSubListSelector(ListVariableDescriptor<Solution_> listVariableDescriptor, EntitySelector<Solution_> entitySelector, EntityIndependentValueSelector<Solution_> valueSelector, int minimumSubListSize, int maximumSubListSize)
-
-
Method Detail
-
solvingStarted
public void solvingStarted(SolverScope<Solution_> solverScope)
- Specified by:
solvingStarted
in interfaceSolverLifecycleListener<Solution_>
- Overrides:
solvingStarted
in classAbstractSelector<Solution_>
-
solvingEnded
public void solvingEnded(SolverScope<Solution_> solverScope)
- Specified by:
solvingEnded
in interfaceSolverLifecycleListener<Solution_>
- Overrides:
solvingEnded
in classAbstractSelector<Solution_>
-
isCountable
public boolean isCountable()
Description copied from interface:Selector
If false, thenSelector.isNeverEnding()
is true.- Specified by:
isCountable
in interfaceSelector<Solution_>
- Returns:
- true if all the
ValueRange
s 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 ifSelector.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 interfaceSelector<Solution_>
- Returns:
- true if the
Iterator.hasNext()
of theIterator
created byIterable.iterator()
never returns false (except when it's empty).
-
getSize
public long getSize()
Description copied from interface:IterableSelector
A random JITSelector
withSelector.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 inSelectionProbabilityWeightFactory
.- Specified by:
getSize
in interfaceIterableSelector<Solution_,SubList>
- Returns:
- the approximate number of elements generated by this
Selector
, always>= 0
-
-