org.drools.planner.core.heuristic.selector.value
Class FromSolutionPropertyValueSelector
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.FromSolutionPropertyValueSelector
- All Implemented Interfaces:
- Iterable<Object>, EventListener, SelectionCacheLifecycleListener, Selector, ValueSelector, SolverPhaseLifecycleListener, SolverLifecycleListener
public class FromSolutionPropertyValueSelector
- extends AbstractValueSelector
- implements SelectionCacheLifecycleListener
This is the common ValueSelector
implementation.
variableDescriptor
protected final PlanningVariableDescriptor variableDescriptor
cacheType
protected final SelectionCacheType cacheType
randomSelection
protected final boolean randomSelection
cachedValueList
protected List<Object> cachedValueList
FromSolutionPropertyValueSelector
public FromSolutionPropertyValueSelector(PlanningVariableDescriptor variableDescriptor,
SelectionCacheType cacheType,
boolean randomSelection)
getVariableDescriptor
public PlanningVariableDescriptor getVariableDescriptor()
- Specified by:
getVariableDescriptor
in interface ValueSelector
- 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
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)
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).
- Specified by:
isNeverEnding
in interface Selector
- Returns:
- true if the
Iterator.hasNext()
of the Iterator
created by Iterable.iterator()
never returns false.
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
iterator
public ValueIterator iterator()
- Specified by:
iterator
in interface Iterable<Object>
- Specified by:
iterator
in interface ValueSelector
toString
public String toString()
- Overrides:
toString
in class Object
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