Package ai.timefold.solver.core.impl.heuristic.move

Class AbstractMove<Solution_>

java.lang.Object

ai.timefold.solver.core.impl.heuristic.move.AbstractMove<Solution_>

Type Parameters:

Solution_ - the solution type, the class with the PlanningSolution annotation

All Implemented Interfaces:

Move<Solution_>

Direct Known Subclasses:

ChangeMove, KOptListMove, KOptMove, ListChangeMove, ListRuinRecreateMove, ListSwapMove, PillarChangeMove, PillarSwapMove, RuinRecreateMove, SubChainChangeMove, SubChainReversingChangeMove, SubChainReversingSwapMove, SubChainSwapMove, SubListChangeMove, SubListSwapMove, SwapMove, TailChainSwapMove, TwoOptListMove

public abstract class AbstractMove<Solution_>
extends Object
implements Move<Solution_>

Abstract superclass for Move, requiring implementation of undo moves. Unless raw performance is a concern, consider using AbstractSimplifiedMove instead.

See Also:

• Move

Constructor Summary

Constructors

Constructor	Description
AbstractMove()

Method Summary

Modifier and Type	Method	Description
protected abstract Move<Solution_>	createUndoMove(ScoreDirector<Solution_> scoreDirector)	Called before the move is done, so the move can be evaluated and then be undone without resulting into a permanent change in the solution.
final Move<Solution_>	doMove(ScoreDirector<Solution_> scoreDirector)	Does the move (which indirectly affects the ScoreDirector.getWorkingSolution()).
protected abstract void	doMoveOnGenuineVariables(ScoreDirector<Solution_> scoreDirector)	Like doMoveOnly(ScoreDirector) but without the ScoreDirector.triggerVariableListeners() call (because doMoveOnly(ScoreDirector) already does that).
final void	doMoveOnly(ScoreDirector<Solution_> scoreDirector)	As defined by Move.doMove(ScoreDirector), but does not return an undo move.
static <E> List<E>	rebaseList(List<E> externalObjectList, ScoreDirector<?> destinationScoreDirector)
static <E> Set<E>	rebaseSet(Set<E> externalObjectSet, ScoreDirector<?> destinationScoreDirector)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ai.timefold.solver.core.impl.heuristic.move.Move

getPlanningEntities, getPlanningValues, getSimpleMoveTypeDescription, isMoveDoable, rebase

Constructor Details

AbstractMove

public AbstractMove()

Method Details

doMove

public final Move<Solution_> doMove(ScoreDirector<Solution_> scoreDirector)

Description copied from interface: Move

Does the move (which indirectly affects the ScoreDirector.getWorkingSolution()). When the working solution is modified, the ScoreDirector must be correctly notified (through ScoreDirector.beforeVariableChanged(Object, String) and ScoreDirector.afterVariableChanged(Object, String)), otherwise later calculated Scores will be corrupted.

This method must end with calling ScoreDirector.triggerVariableListeners() to ensure all shadow variables are updated.

This method must return an undo move, so the move can be evaluated and then be undone without resulting into a permanent change in the solution.

Specified by:

doMove in interface Move<Solution_>

Parameters:

scoreDirector - never null, the ScoreDirector that needs to get notified of the changes

Returns:

an undoMove which does the exact opposite of this move

doMoveOnly

public final void doMoveOnly(ScoreDirector<Solution_> scoreDirector)

Description copied from interface: Move

As defined by Move.doMove(ScoreDirector), but does not return an undo move.

Specified by:

doMoveOnly in interface Move<Solution_>

Parameters:

scoreDirector - never null, the ScoreDirector that needs to get notified of the changes

createUndoMove

protected abstract Move<Solution_> createUndoMove(ScoreDirector<Solution_> scoreDirector)

Called before the move is done, so the move can be evaluated and then be undone without resulting into a permanent change in the solution.

Parameters:

scoreDirector - the ScoreDirector not yet modified by the move.

Returns:

an undoMove which does the exact opposite of this move.

doMoveOnGenuineVariables

protected abstract void doMoveOnGenuineVariables(ScoreDirector<Solution_> scoreDirector)

Like doMoveOnly(ScoreDirector) but without the ScoreDirector.triggerVariableListeners() call (because doMoveOnly(ScoreDirector) already does that).

Parameters:

scoreDirector - never null

rebaseList

public static <E> List<E> rebaseList(List<E> externalObjectList,
 ScoreDirector<?> destinationScoreDirector)

rebaseSet

public static <E> Set<E> rebaseSet(Set<E> externalObjectSet,
 ScoreDirector<?> destinationScoreDirector)