org.optaplanner.core.impl.heuristic.selector.move.decorator
Class ProbabilityMoveSelector
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.decorator.ProbabilityMoveSelector
- All Implemented Interfaces:
- Iterable<Move>, EventListener, SelectionCacheLifecycleListener, IterableSelector<Move>, MoveSelector, Selector, PhaseLifecycleListener, SolverLifecycleListener
public class ProbabilityMoveSelector
- extends AbstractMoveSelector
- implements SelectionCacheLifecycleListener
childMoveSelector
protected final MoveSelector childMoveSelector
cacheType
protected final SelectionCacheType cacheType
probabilityWeightFactory
protected final SelectionProbabilityWeightFactory probabilityWeightFactory
cachedMoveMap
protected NavigableMap<Double,Move> cachedMoveMap
probabilityWeightTotal
protected double probabilityWeightTotal
ProbabilityMoveSelector
public ProbabilityMoveSelector(MoveSelector childMoveSelector,
SelectionCacheType cacheType,
SelectionProbabilityWeightFactory probabilityWeightFactory)
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
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 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
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