Package org.jacop.set.constraints

Class PartitionSet

java.lang.Object

org.jacop.constraints.DecomposedConstraint<Constraint>

org.jacop.constraints.Constraint

org.jacop.set.constraints.PartitionSet

All Implemented Interfaces:

UsesQueueVariable

public class PartitionSet
extends Constraint
implements UsesQueueVariable

Channel constraint requires that array of int variables x and array of set variables y are related such that (x[i] = j) <-> (i in s[j]). Indexes start form 0, both for integer and set variables, by default. To define other starting index use offset definitions.

Version:

4.10

Field Summary

Fields

Modifier and Type	Field	Description
(package private) boolean	firstConsistencyCheck
(package private) static AtomicInteger	idNumber
(package private) int	n
(package private) SetVar[]	s
(package private) Store	store
(package private) IntDomain	u
(package private) LinkedHashSet<Integer>	variableQueue
(package private) HashMap<SetVar,Integer>	varMap

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
PartitionSet(SetVar[] s, IntDomain universe)	It constructs a Channel 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()
void	queueVariable(int level, Var var)	This is a function called to indicate which variable in a scope of constraint has changed.
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, long2int, numberArgs, 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

idNumber

static AtomicInteger idNumber

s

SetVar[] s

n

int n

u

IntDomain u

firstConsistencyCheck

boolean firstConsistencyCheck

variableQueue

LinkedHashSet<Integer> variableQueue

varMap

HashMap<SetVar,Integer> varMap

store

Store store

Constructor Details

PartitionSet

public PartitionSet(SetVar[] s,
 IntDomain universe)

It constructs a Channel constraint.

Parameters:

s - array of set variables.

universe - set of all values.

Method Details

consistency

public void consistency(Store store)
                 throws FailException

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.

Throws:

FailException

queueVariable

public void queueVariable(int level,
 Var var)

Description copied from class: Constraint

This is a function called to indicate which variable in a scope of constraint has changed. It also indicates a store level at which the change has occurred.

Overrides:

queueVariable in class Constraint

Parameters:

level - the level of the store at which the change has occurred.

var - variable which has changed.

getDefaultConsistencyPruningEvent

public int getDefaultConsistencyPruningEvent()

Specified by:

getDefaultConsistencyPruningEvent in class Constraint

toString

public String toString()

Description copied from class: Constraint

It produces a string representation of a constraint state.

Overrides:

toString in class Constraint