org.optaplanner.core.impl.heuristic.selector.entity
Class FromSolutionEntitySelector
java.lang.Object
org.optaplanner.core.impl.heuristic.selector.AbstractSelector
org.optaplanner.core.impl.heuristic.selector.entity.AbstractEntitySelector
org.optaplanner.core.impl.heuristic.selector.entity.FromSolutionEntitySelector
- All Implemented Interfaces:
- Iterable<Object>, EventListener, ListIterable<Object>, EntitySelector, IterableSelector<Object>, ListIterableSelector<Object>, Selector, PhaseLifecycleListener, SolverLifecycleListener
public class FromSolutionEntitySelector
- extends AbstractEntitySelector
This is the common EntitySelector
implementation.
entityDescriptor
protected final EntityDescriptor entityDescriptor
minimumCacheType
protected final SelectionCacheType minimumCacheType
randomSelection
protected final boolean randomSelection
cachedEntityList
protected List<Object> cachedEntityList
cachedEntityListRevision
protected Long cachedEntityListRevision
cachedEntityListIsDirty
protected boolean cachedEntityListIsDirty
FromSolutionEntitySelector
public FromSolutionEntitySelector(EntityDescriptor entityDescriptor,
SelectionCacheType minimumCacheType,
boolean randomSelection)
getEntityDescriptor
public EntityDescriptor getEntityDescriptor()
- Returns:
- never null
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, at least
SelectionCacheType.STEP
phaseStarted
public void phaseStarted(AbstractPhaseScope phaseScope)
- Specified by:
phaseStarted
in interface PhaseLifecycleListener
- Overrides:
phaseStarted
in class AbstractSelector
stepStarted
public void stepStarted(AbstractStepScope stepScope)
- Specified by:
stepStarted
in interface PhaseLifecycleListener
- Overrides:
stepStarted
in class AbstractSelector
phaseEnded
public void phaseEnded(AbstractPhaseScope phaseScope)
- Specified by:
phaseEnded
in interface PhaseLifecycleListener
- Overrides:
phaseEnded
in class AbstractSelector
isCountable
public boolean isCountable()
- Description copied from interface:
Selector
- If false, then
Selector.isNeverEnding()
is true.
- 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).
- 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
.
- Returns:
- the approximate number of elements generated by this
Selector
, always >= 0
iterator
public Iterator<Object> iterator()
listIterator
public ListIterator<Object> listIterator()
- Description copied from interface:
ListIterable
- See
List.listIterator()
- Returns:
- never null, see
List.listIterator()
.
listIterator
public ListIterator<Object> listIterator(int index)
- Description copied from interface:
ListIterable
- See
List.listIterator()
- Parameters:
index
- lower than the size of this ListIterable
, see List.listIterator(int)
.
- Returns:
- never null, see
List.listIterator(int)
.
endingIterator
public Iterator<Object> endingIterator()
- Description copied from interface:
EntitySelector
- If
Selector.isNeverEnding()
is true, then Iterable.iterator()
will never end.
This returns an ending Iterator
, that tries to match Iterable.iterator()
as much as possible,
but return each distinct element only once
and therefore it might not respect the configuration of this EntitySelector
entirely.
- Returns:
- never null
- See Also:
Iterable.iterator()
toString
public String toString()
- Overrides:
toString
in class Object
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