OptaPlanner distribution 6.2.1-SNAPSHOT

org.optaplanner.core.impl.heuristic.selector.move.generic.chained
Class TailChainSwapMoveSelector

java.lang.Object
  extended by org.optaplanner.core.impl.heuristic.selector.AbstractSelector
      extended by org.optaplanner.core.impl.heuristic.selector.move.AbstractMoveSelector
          extended by org.optaplanner.core.impl.heuristic.selector.move.generic.GenericMoveSelector
              extended by org.optaplanner.core.impl.heuristic.selector.move.generic.chained.TailChainSwapMoveSelector
All Implemented Interfaces:
Iterable<Move>, EventListener, IterableSelector<Move>, MoveSelector, Selector, PhaseLifecycleListener, SolverLifecycleListener

public class TailChainSwapMoveSelector
extends GenericMoveSelector

Also known as a 2-opt move selector.


Field Summary
protected  AnchorVariableSupply anchorVariableSupply
           
protected  EntitySelector entitySelector
           
protected  SingletonInverseVariableSupply inverseVariableSupply
           
protected  boolean randomSelection
           
protected  ValueSelector valueSelector
           
 
Fields inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
logger, phaseLifecycleSupport, workingRandom
 
Constructor Summary
TailChainSwapMoveSelector(EntitySelector entitySelector, ValueSelector valueSelector, boolean randomSelection)
           
 
Method Summary
 long getSize()
          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.
 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<Move> iterator()
           
 void solvingEnded(DefaultSolverScope solverScope)
           
 void solvingStarted(DefaultSolverScope 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.Selector
getCacheType
 
Methods inherited from interface org.optaplanner.core.impl.phase.event.PhaseLifecycleListener
phaseEnded, phaseStarted, stepEnded, stepStarted
 

Field Detail

entitySelector

protected final EntitySelector entitySelector

valueSelector

protected final ValueSelector valueSelector

randomSelection

protected final boolean randomSelection

inverseVariableSupply

protected SingletonInverseVariableSupply inverseVariableSupply

anchorVariableSupply

protected AnchorVariableSupply anchorVariableSupply
Constructor Detail

TailChainSwapMoveSelector

public TailChainSwapMoveSelector(EntitySelector entitySelector,
                                 ValueSelector valueSelector,
                                 boolean randomSelection)
Method Detail

solvingStarted

public void solvingStarted(DefaultSolverScope solverScope)
Specified by:
solvingStarted in interface SolverLifecycleListener
Overrides:
solvingStarted in class AbstractSelector

solvingEnded

public void solvingEnded(DefaultSolverScope solverScope)
Specified by:
solvingEnded in interface SolverLifecycleListener
Overrides:
solvingEnded 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()
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<Move> iterator()

toString

public String toString()
Overrides:
toString in class Object

OptaPlanner distribution 6.2.1-SNAPSHOT

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