OptaPlanner core 6.2.0.Beta1

org.optaplanner.core.impl.heuristic.selector.value
Class FromEntityPropertyValueSelector

java.lang.Object
  extended by org.optaplanner.core.impl.heuristic.selector.AbstractSelector
      extended by org.optaplanner.core.impl.heuristic.selector.value.AbstractValueSelector
          extended by org.optaplanner.core.impl.heuristic.selector.value.FromEntityPropertyValueSelector
All Implemented Interfaces:
EventListener, Selector, ValueSelector, PhaseLifecycleListener, SolverLifecycleListener

public class FromEntityPropertyValueSelector
extends AbstractValueSelector

This is the common ValueSelector implementation.


Field Summary
protected  boolean randomSelection
           
protected  ValueRangeDescriptor valueRangeDescriptor
           
protected  Solution workingSolution
           
 
Fields inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
logger, phaseLifecycleSupport, workingRandom
 
Constructor Summary
FromEntityPropertyValueSelector(ValueRangeDescriptor valueRangeDescriptor, boolean randomSelection)
           
 
Method Summary
 long getSize(Object entity)
          Similar to IterableSelector.getSize(), but requires an entity.
 GenuineVariableDescriptor getVariableDescriptor()
           
 boolean isCountable()
          If false, then Selector.isNeverEnding() is true.
 boolean isNeverEnding()
          Is true if Selector.isCountable() is false or if this selector is in random order (for most cases).
 Iterator<Object> iterator(Object entity)
          Similar to Iterable.iterator(), but requires an entity.
 void phaseEnded(AbstractPhaseScope phaseScope)
           
 void phaseStarted(AbstractPhaseScope phaseScope)
           
 String toString()
           
 
Methods inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
getCacheType, 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.optaplanner.core.impl.heuristic.selector.Selector
getCacheType
 
Methods inherited from interface org.optaplanner.core.impl.phase.event.PhaseLifecycleListener
stepEnded, stepStarted
 
Methods inherited from interface org.optaplanner.core.impl.solver.event.SolverLifecycleListener
solvingEnded, solvingStarted
 

Field Detail

valueRangeDescriptor

protected final ValueRangeDescriptor valueRangeDescriptor

randomSelection

protected final boolean randomSelection

workingSolution

protected Solution workingSolution
Constructor Detail

FromEntityPropertyValueSelector

public FromEntityPropertyValueSelector(ValueRangeDescriptor valueRangeDescriptor,
                                       boolean randomSelection)
Method Detail

getVariableDescriptor

public GenuineVariableDescriptor getVariableDescriptor()
Returns:
never null

phaseStarted

public void phaseStarted(AbstractPhaseScope phaseScope)
Specified by:
phaseStarted in interface PhaseLifecycleListener
Overrides:
phaseStarted 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 ValueRanges 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(Object entity)
Description copied from interface: ValueSelector
Similar to IterableSelector.getSize(), but requires an entity.

Parameters:
entity - never null
Returns:
the approximate number of elements generated by this Selector, always >= 0

iterator

public Iterator<Object> iterator(Object entity)
Description copied from interface: ValueSelector
Similar to Iterable.iterator(), but requires an entity.

Parameters:
entity - never null
Returns:
never null

toString

public String toString()
Overrides:
toString in class Object

OptaPlanner core 6.2.0.Beta1

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