Package org.jacop.constraints.cumulative

Class CumulativeBasic

java.lang.Object

org.jacop.constraints.DecomposedConstraint<Constraint>

org.jacop.constraints.Constraint

org.jacop.constraints.cumulative.CumulativeBasic

Direct Known Subclasses:

Cumulative

public class CumulativeBasic
extends Constraint

CumulativeBasic implements the cumulative constraint using time tabling algorithm.

Version:

4.8

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	CumulativeBasic.Event

Field Summary

Fields

Modifier and Type	Field	Description
(package private) CumulativePrimary	cumulativeForConstants
private static boolean	debug
private static boolean	debugNarr
private java.util.Comparator<CumulativeBasic.Event>	eventComparator
private static java.util.concurrent.atomic.AtomicInteger	idNumber
IntVar	limit	It specifies the limit of the profile of cumulative use of resources.
(package private) boolean	possibleZeroTasks	It specifies whether there possibly exist tasks that have duration or resource variable min value equal zero.
private static int	profile
private static int	pruneEnd
private static int	pruneStart
(package private) TaskView[]	taskNormal	All tasks of the constraint

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
CumulativeBasic(java.util.List<? extends IntVar> starts, java.util.List<? extends IntVar> durations, java.util.List<? extends IntVar> resources, IntVar limit)	It creates a cumulative constraint.
CumulativeBasic(IntVar[] starts, IntVar[] durations, IntVar[] resources, IntVar limit)	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.
int	getDefaultConsistencyPruningEvent()
(package private) void	profileProp(Store store)
private void	sweepPruning(Store store)
java.lang.String	toString()	It produces a string representation of a constraint state.
private void	updateTasksRes(Store store)

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 Detail

idNumber

private static final java.util.concurrent.atomic.AtomicInteger idNumber

debug

private static final boolean debug

See Also:

Constant Field Values

debugNarr

private static final boolean debugNarr

See Also:

Constant Field Values

eventComparator

private java.util.Comparator<CumulativeBasic.Event> eventComparator

taskNormal

final TaskView[] taskNormal

All tasks of the constraint

limit

public final IntVar limit

It specifies the limit of the profile of cumulative use of resources.

possibleZeroTasks

boolean possibleZeroTasks

It specifies whether there possibly exist tasks that have duration or resource variable min value equal zero.

cumulativeForConstants

CumulativePrimary cumulativeForConstants

profile

private static final int profile

See Also:

Constant Field Values

pruneStart

private static final int pruneStart

See Also:

Constant Field Values

pruneEnd

private static final int pruneEnd

See Also:

Constant Field Values

Constructor Detail

CumulativeBasic

public CumulativeBasic(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.

CumulativeBasic

public CumulativeBasic(java.util.List<? extends IntVar> starts,
                       java.util.List<? extends IntVar> durations,
                       java.util.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.

Method Detail

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.

Specified by:

consistency in class Constraint

Parameters:

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

profileProp

void profileProp(Store store)

getDefaultConsistencyPruningEvent

public int getDefaultConsistencyPruningEvent()

Specified by:

getDefaultConsistencyPruningEvent in class Constraint

updateTasksRes

private void updateTasksRes(Store store)

toString

public java.lang.String toString()

Description copied from class: Constraint

It produces a string representation of a constraint state.

Overrides:

toString in class Constraint

sweepPruning

private void sweepPruning(Store store)