public class ElementSet extends Constraint implements SatisfiedPresent
By default, indexing starts from 1, if it is required to be different for example starting from 0, then indexOffset must be specified to be equal to -1.
Modifier and Type | Field and Description |
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IntVar |
index
It specifies what element from the list of sets is equal to set variable value.
|
int |
indexOffset
It allows to offset the indexing.
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IntDomain[] |
list
It specifies a list of sets from which one element will be made equal to set variable
value.
|
SetVar |
value
It specifies the set variable which is equal to one of the sets from the list as
indicated by int variable index.
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atomicExecution, consistencyPruningEvents, constraintScope, earlyTerminationOK, increaseWeight, numberId, scope, trace
queueIndex
Constructor and Description |
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ElementSet(IntVar index,
IntDomain[] list,
SetVar value)
It constructs an elementSet constraint to restrict the domains of the variables index and value.
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ElementSet(IntVar index,
IntDomain[] list,
SetVar value,
int indexOffset)
It constructs a constraint to restrict the domains of the variables index and value.
|
Modifier and Type | Method and Description |
---|---|
void |
consistency(Store store)
It is a (most probably incomplete) consistency function which removes the
values from variables domains.
|
int |
getConsistencyPruningEvent(Var var)
It retrieves the pruning event which causes reevaluation of the
constraint.
|
int |
getDefaultConsistencyPruningEvent() |
boolean |
satisfied()
It checks if the constraint is satisfied.
|
String |
toString()
It produces a string representation of a constraint state.
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afc, arguments, cleanAfterFailure, decompose, getGuideConstraint, getGuideValue, getGuideVariable, grounded, grounded, id, impose, impose, imposeDecomposition, increaseWeight, intArrayToString, long2int, numberArgs, queueVariable, removeConstraint, requiresMonotonicity, setConsistencyPruningEvent, setConstraintScope, setScope, setScope, setScope, setScope, setScope, setWatchedVariableGrounded, supplyGuideFeedback, updateAFC, watchedVariableGrounded
auxiliaryVariables, checkInput, checkInput, checkInputForDuplication, checkInputForDuplicationSkipSingletons, checkInputForNullness, checkInputForNullness, checkInputForNullness, derivative, getDubletonsSkipSingletons, imposeDecomposition
public IntVar index
public IntDomain[] list
public SetVar value
public int indexOffset
public ElementSet(IntVar index, IntDomain[] list, SetVar value, int indexOffset)
value
- variable that is restricted to have the same elements as list[index].list
- array of sets that contains possible values for variable value.index
- variable that is restricted to be the index of sets for which list[index] == value.indexOffset
- the shift applied to the index variable.public ElementSet(IntVar index, IntDomain[] list, SetVar value)
value
- variable that is restricted to have the same elements as list[index].list
- array of sets that contains possible values for variable value.index
- variable that is restricted to be the index of sets for which list[index] == value.public void consistency(Store store)
Constraint
consistency
in class Constraint
store
- constraint store within which the constraint consistency is being checked.public int getConsistencyPruningEvent(Var var)
Constraint
getConsistencyPruningEvent
in class Constraint
var
- variable for which pruning event is retrievedpublic int getDefaultConsistencyPruningEvent()
getDefaultConsistencyPruningEvent
in class Constraint
public boolean satisfied()
SatisfiedPresent
Implementations of this interface for constraints that are not PrimitiveConstraint may require constraint imposition and consistency check as a requirement to work correctly.
satisfied
in interface SatisfiedPresent
public String toString()
Constraint
toString
in class Constraint
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