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

Class ListUnassignMove<Solution_>

java.lang.Object

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

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

All Implemented Interfaces:

Move<Solution_>

public class ListUnassignMove<Solution_>
extends AbstractMove<Solution_>

Constructor Summary

Constructors

Constructor	Description
ListUnassignMove(ListVariableDescriptor<Solution_> variableDescriptor, Object sourceEntity, int sourceIndex)

Method Summary

Modifier and Type	Method	Description
AbstractMove<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).
boolean	equals(Object o)
String	getSimpleMoveTypeDescription()	Describes the move type for statistical purposes.
int	hashCode()
boolean	isMoveDoable(ScoreDirector<Solution_> scoreDirector)	Called before a move is evaluated to decide whether the move can be done and evaluated.
String	toString()

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

doMove, doMoveOnly, rebaseArray, rebaseList

Methods inherited from class java.lang.Object

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

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

getPlanningEntities, getPlanningValues, rebase

Constructor Detail

ListUnassignMove

public ListUnassignMove(ListVariableDescriptor<Solution_> variableDescriptor,
                        Object sourceEntity,
                        int sourceIndex)

Method Detail

isMoveDoable

public boolean isMoveDoable(ScoreDirector<Solution_> scoreDirector)

Description copied from interface: Move

Called before a move is evaluated to decide whether the move can be done and evaluated. A Move is not doable if:

• Either doing it would change nothing in the PlanningSolution.
• Either it's simply not possible to do (for example due to built-in hard constraints).

It is recommended to keep this method implementation simple: do not use it in an attempt to satisfy normal hard and soft constraints.

Although you could also filter out non-doable moves in for example the MoveSelector or MoveListFactory, this is not needed as the Solver will do it for you.

Parameters:

scoreDirector - the ScoreDirector not yet modified by the move.

Returns:

true if the move achieves a change in the solution and the move is possible to do on the solution.

createUndoMove

public AbstractMove<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.

Specified by:

createUndoMove in class AbstractMove<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).

Specified by:

doMoveOnGenuineVariables in class AbstractMove<Solution_>

Parameters:

scoreDirector - never null

getSimpleMoveTypeDescription

public String getSimpleMoveTypeDescription()

Description copied from interface: Move

Describes the move type for statistical purposes. For example "ChangeMove(Process.computer)".

The format is not formalized. Never parse the String returned by this method.

Returns:

never null

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object