Package org.jacop.constraints.cumulative

Class CumulativeUnary

java.lang.Object

org.jacop.constraints.DecomposedConstraint<Constraint>

org.jacop.constraints.Constraint

org.jacop.constraints.cumulative.CumulativeBasic

org.jacop.constraints.cumulative.Cumulative

org.jacop.constraints.cumulative.CumulativeUnary

public class CumulativeUnary
extends Cumulative

CumulativeUnary implements the scheduling constraint for unary resources using

overload, not-first-not-last and detectable algorithms based on

Petr Vilim, "O(n log n) Filtering Algorithms for Unary Resource Constraints", Proceedings of CP-AI-OR 2004,

Version:

4.8

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	doProfile
private Comparator<TaskView>	taskIncEctComparator
private Comparator<TaskView>	taskIncLctComparator
private Comparator<TaskView>	taskIncLstComparator
private final TaskView[]	tvn	Local copies of tasks in normal and reserved views
private final TaskView[]	tvr

Fields inherited from class org.jacop.constraints.cumulative.Cumulative

taskDecLctComparator, taskIncEstComparator, taskReversed

Fields inherited from class org.jacop.constraints.cumulative.CumulativeBasic

cumulativeForConstants, limit, possibleZeroTasks, taskNormal

Fields inherited from class org.jacop.constraints.Constraint

atomicExecution, consistencyPruningEvents, constraintScope, earlyTerminationOK, increaseWeight, numberId, scope, trace

Fields inherited from class org.jacop.constraints.DecomposedConstraint

queueIndex

Constructor Summary

Constructors

Constructor	Description
CumulativeUnary(List<? extends IntVar> starts, List<? extends IntVar> durations, List<? extends IntVar> resources, IntVar limit)	It creates a cumulative constraint.
CumulativeUnary(List<? extends IntVar> starts, List<? extends IntVar> durations, List<? extends IntVar> resources, IntVar limit, boolean doProfile)	It creates a cumulative constraint.
CumulativeUnary(IntVar[] starts, IntVar[] durations, IntVar[] resources, IntVar limit)	It creates a cumulative constraint.
CumulativeUnary(IntVar[] starts, IntVar[] durations, IntVar[] resources, IntVar limit, boolean doProfile)	It creates a cumulative constraint.

Method Summary

Modifier and Type	Method	Description
void	consistency(Store store)	It is a (most probably incomplete) consistency function which removes the values from variables domains.
private void	detectable(Store store, TaskView[] tn, TaskView[] tr)
private void	detectable(Store store, ThetaTree tree, TaskView[] t, TaskView[] q, TaskView[] to)
private void	detectablePhase(Store store, TaskView[] tc)
private void	edgeFind(Store store, TaskView[] tn, TaskView[] tr)
private void	edgeFindPhase(Store store, TaskView[] tc)
private void	notFirstNotLast(Store store, TaskView[] tn, TaskView[] tr)
private void	notFirstNotLastPhase(Store store, TaskView[] tc)
private void	notLast(Store store, ThetaTree tree, TaskView[] t, TaskView[] q, TaskView[] tc)
private void	overload(TaskView[] ts)
String	toString()	It produces a string representation of a constraint state.

Methods inherited from class org.jacop.constraints.cumulative.Cumulative

doQuadraticEdgeFind, filterZeroTasks, getDefaultConsistencyPruningEvent

Methods inherited from class org.jacop.constraints.cumulative.CumulativeBasic

profileProp

Methods inherited from class org.jacop.constraints.Constraint

afc, arguments, cleanAfterFailure, decompose, getConsistencyPruningEvent, getGuideConstraint, getGuideValue, getGuideVariable, grounded, grounded, id, impose, impose, imposeDecomposition, increaseWeight, intArrayToString, numberArgs, queueVariable, removeConstraint, requiresMonotonicity, setConsistencyPruningEvent, setConstraintScope, setScope, setScope, setScope, setScope, setScope, setWatchedVariableGrounded, supplyGuideFeedback, updateAFC, watchedVariableGrounded

Methods inherited from class org.jacop.constraints.DecomposedConstraint

auxiliaryVariables, checkInput, checkInput, checkInputForDuplication, checkInputForDuplicationSkipSingletons, checkInputForNullness, checkInputForNullness, checkInputForNullness, derivative, getDubletonsSkipSingletons, imposeDecomposition

Methods inherited from class java.lang.Object

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

Field Details

doProfile

private boolean doProfile

tvn

private final TaskView[] tvn

Local copies of tasks in normal and reserved views

tvr

private final TaskView[] tvr

taskIncLctComparator

private Comparator<TaskView> taskIncLctComparator

taskIncLstComparator

private Comparator<TaskView> taskIncLstComparator

taskIncEctComparator

private Comparator<TaskView> taskIncEctComparator

Constructor Details

CumulativeUnary

public CumulativeUnary(IntVar[] starts,
 IntVar[] durations,
 IntVar[] resources,
 IntVar limit)

It creates a cumulative constraint.

Parameters:

starts - variables denoting starts of the tasks.

durations - variables denoting durations of the tasks.

resources - variables denoting resource usage of the tasks.

limit - the overall limit of resources which has to be used.

CumulativeUnary

public CumulativeUnary(IntVar[] starts,
 IntVar[] durations,
 IntVar[] resources,
 IntVar limit,
 boolean doProfile)

It creates a cumulative constraint.

Parameters:

starts - variables denoting starts of the tasks.

durations - variables denoting durations of the tasks.

resources - variables denoting resource usage of the tasks.

limit - the overall limit of resources which has to be used.

doProfile - defines whether to do profile-based propagation (true) or not (false); default is false

CumulativeUnary

public CumulativeUnary(List<? extends IntVar> starts,
 List<? extends IntVar> durations,
 List<? extends IntVar> resources,
 IntVar limit)

It creates a cumulative constraint.

Parameters:

starts - variables denoting starts of the tasks.

durations - variables denoting durations of the tasks.

resources - variables denoting resource usage of the tasks.

limit - the overall limit of resources which has to be used.

CumulativeUnary

public CumulativeUnary(List<? extends IntVar> starts,
 List<? extends IntVar> durations,
 List<? extends IntVar> resources,
 IntVar limit,
 boolean doProfile)

It creates a cumulative constraint.

Parameters:

starts - variables denoting starts of the tasks.

durations - variables denoting durations of the tasks.

resources - variables denoting resource usage of the tasks.

limit - the overall limit of resources which has to be used.

doProfile - defines whether to do profile-based propagation (true) or not (false); default is false

Method Details

consistency

public void consistency(Store store)

Description copied from class: Constraint

It is a (most probably incomplete) consistency function which removes the values from variables domains. Only values which do not have any support in a solution space are removed.

Overrides:

consistency in class Cumulative

Parameters:

store - constraint store within which the constraint consistency is being checked.

overload

private void overload(TaskView[] ts)

notFirstNotLast

private void notFirstNotLast(Store store,
 TaskView[] tn,
 TaskView[] tr)

notFirstNotLastPhase

private void notFirstNotLastPhase(Store store,
 TaskView[] tc)

notLast

private void notLast(Store store,
 ThetaTree tree,
 TaskView[] t,
 TaskView[] q,
 TaskView[] tc)

detectable

private void detectable(Store store,
 TaskView[] tn,
 TaskView[] tr)

detectablePhase

private void detectablePhase(Store store,
 TaskView[] tc)

detectable

private void detectable(Store store,
 ThetaTree tree,
 TaskView[] t,
 TaskView[] q,
 TaskView[] to)

edgeFind

private void edgeFind(Store store,
 TaskView[] tn,
 TaskView[] tr)

edgeFindPhase

private void edgeFindPhase(Store store,
 TaskView[] tc)

toString

public String toString()

Description copied from class: Constraint

It produces a string representation of a constraint state.

Overrides:

toString in class Cumulative