Package org.jacop.constraints.cumulative

Class CumulativePrimary

java.lang.Object

org.jacop.constraints.DecomposedConstraint<Constraint>

org.jacop.constraints.Constraint

org.jacop.constraints.cumulative.CumulativePrimary

class CumulativePrimary
extends Constraint

CumulativePrimary implements the cumulative constraint using time tabling algorithm.

Version:

4.8

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	CumulativePrimary.Event

Field Summary

Fields

Modifier and Type	Field	Description
private int[]	activeMap
private TimeStamp<java.lang.Integer>	activePnt
private static boolean	debug
private static boolean	debugNarr
private int[]	dur	All durations and resources of the constraint
private java.util.Comparator<CumulativePrimary.Event>	eventComparator
private static java.util.concurrent.atomic.AtomicInteger	idNumber
IntVar	limit	It specifies the limit of the profile of cumulative use of resources.
private static int	profile
private static int	pruneEnd
private static int	pruneStart
private int[]	res
private IntVar[]	start	start times of tasks

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
CumulativePrimary(java.util.List<? extends IntVar> starts, java.util.List<? extends java.lang.Integer> durations, java.util.List<? extends java.lang.Integer> resources, IntVar limit)	It creates a cumulative constraint.
CumulativePrimary(IntVar[] starts, int[] durations, int[] 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()
private void	removeNotUsedProfleTasks()
private void	swap(int i, int j)
(package private) void	sweepPruning(Store store)
java.lang.String	toString()	It produces a string representation of a constraint state.

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 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<CumulativePrimary.Event> eventComparator

start

private final IntVar[] start

start times of tasks

dur

private final int[] dur

All durations and resources of the constraint

res

private final int[] res

activeMap

private int[] activeMap

activePnt

private TimeStamp<java.lang.Integer> activePnt

limit

public final IntVar limit

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

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

CumulativePrimary

public CumulativePrimary(IntVar[] starts,
                         int[] durations,
                         int[] 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.

CumulativePrimary

public CumulativePrimary(java.util.List<? extends IntVar> starts,
                         java.util.List<? extends java.lang.Integer> durations,
                         java.util.List<? extends java.lang.Integer> 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.

getDefaultConsistencyPruningEvent

public int getDefaultConsistencyPruningEvent()

Specified by:

getDefaultConsistencyPruningEvent in class Constraint

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

void sweepPruning(Store store)

removeNotUsedProfleTasks

private void removeNotUsedProfleTasks()

swap

private void swap(int i,
                  int j)