Package ai.timefold.solver.core.impl.heuristic.selector.move.generic.chained

Class ChainedSwapMove<Solution_>

java.lang.Object

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

ai.timefold.solver.core.impl.heuristic.selector.move.generic.SwapMove<Solution_>

ai.timefold.solver.core.impl.heuristic.selector.move.generic.chained.ChainedSwapMove<Solution_>

Type Parameters:

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

All Implemented Interfaces:

Move<Solution_>

public class ChainedSwapMove<Solution_>
extends SwapMove<Solution_>

Field Summary

Fields

Modifier and Type	Field	Description
protected final List<Object>	oldLeftTrailingEntityList
protected final List<Object>	oldRightTrailingEntityList

Fields inherited from class ai.timefold.solver.core.impl.heuristic.selector.move.generic.SwapMove

leftEntity, rightEntity, variableDescriptorList

Constructor Summary

Constructors

Constructor	Description
ChainedSwapMove(List<GenuineVariableDescriptor<Solution_>> genuineVariableDescriptors, Object leftEntity, Object rightEntity, List<Object> oldLeftTrailingEntityList, List<Object> oldRightTrailingEntityList)
ChainedSwapMove(List<GenuineVariableDescriptor<Solution_>> variableDescriptorList, List<SingletonInverseVariableSupply> inverseVariableSupplyList, Object leftEntity, Object rightEntity)

Method Summary

Modifier and Type	Method	Description
ChainedSwapMove<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.
protected void	doMoveOnGenuineVariables(ScoreDirector<Solution_> scoreDirector)	Like AbstractMove.doMoveOnly(ScoreDirector) but without the ScoreDirector.triggerVariableListeners() call (because AbstractMove.doMoveOnly(ScoreDirector) already does that).
ChainedSwapMove<Solution_>	rebase(ScoreDirector<Solution_> destinationScoreDirector)	Rebases a move from an origin ScoreDirector to another destination ScoreDirector which is usually on another Thread or JVM.

Methods inherited from class ai.timefold.solver.core.impl.heuristic.selector.move.generic.SwapMove

appendVariablesToString, equals, getLeftEntity, getPlanningEntities, getPlanningValues, getRightEntity, getSimpleMoveTypeDescription, hashCode, isMoveDoable, toString

Methods inherited from class ai.timefold.solver.core.impl.heuristic.move.AbstractMove

doMove, doMoveOnly, rebaseList, rebaseSet

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

oldLeftTrailingEntityList

protected final List<Object> oldLeftTrailingEntityList

oldRightTrailingEntityList

protected final List<Object> oldRightTrailingEntityList

Constructor Details

ChainedSwapMove

public ChainedSwapMove(List<GenuineVariableDescriptor<Solution_>> variableDescriptorList,
 List<SingletonInverseVariableSupply> inverseVariableSupplyList,
 Object leftEntity,
 Object rightEntity)

ChainedSwapMove

public ChainedSwapMove(List<GenuineVariableDescriptor<Solution_>> genuineVariableDescriptors,
 Object leftEntity,
 Object rightEntity,
 List<Object> oldLeftTrailingEntityList,
 List<Object> oldRightTrailingEntityList)

Method Details

createUndoMove

public ChainedSwapMove<Solution_> createUndoMove(ScoreDirector<Solution_> scoreDirector)

Description copied from class: AbstractMove

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.

Overrides:

createUndoMove in class SwapMove<Solution_>

Parameters:

scoreDirector - the ScoreDirector not yet modified by the move.

Returns:

an undoMove which does the exact opposite of this move.

doMoveOnGenuineVariables

protected void doMoveOnGenuineVariables(ScoreDirector<Solution_> scoreDirector)

Description copied from class: AbstractMove

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

Overrides:

doMoveOnGenuineVariables in class SwapMove<Solution_>

Parameters:

scoreDirector - never null

rebase

public ChainedSwapMove<Solution_> rebase(ScoreDirector<Solution_> destinationScoreDirector)

Description copied from interface: Move

Rebases a move from an origin ScoreDirector to another destination ScoreDirector which is usually on another Thread or JVM. The new move returned by this method translates the entities and problem facts to the destination PlanningSolution of the destination ScoreDirector, That destination PlanningSolution is a deep planning clone (or an even deeper clone) of the origin PlanningSolution that this move has been generated from.

That new move does the exact same change as this move, resulting in the same PlanningSolution state, presuming that destination PlanningSolution was in the same state as the original PlanningSolution to begin with.

Generally speaking, an implementation of this method iterates through every entity and fact instance in this move, translates each one to the destination ScoreDirector with ScoreDirector.lookUpWorkingObject(Object) and creates a new move instance of the same move type, using those translated instances.

The destination PlanningSolution can be in a different state than the original PlanningSolution. So, rebasing can only depend on the identity of planning entities and problem facts, which are usually declared by a PlanningId on those classes. It must not depend on the state of the planning variables. One thread might rebase a move before, amid or after another thread does that same move instance.

This method is thread-safe.

Specified by:

rebase in interface Move<Solution_>

Overrides:

rebase in class SwapMove<Solution_>

Parameters:

destinationScoreDirector - never null, the ScoreDirector.getWorkingSolution() that the new move should change the planning entity instances of.

Returns:

never null, a new move that does the same change as this move on another solution instance