Package org.jacop.constraints
Class CountValues
java.lang.Object
org.jacop.constraints.DecomposedConstraint<Constraint>
org.jacop.constraints.Constraint
org.jacop.constraints.CountValues
- All Implemented Interfaces:
SatisfiedPresent
CountValues constraint implements the counting over numbers of occurrences of a given
vector of values in a list of variables. The number of occurrences is specified by
variable counter.
- Version:
- 4.8
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Field Summary
FieldsModifier and TypeFieldDescriptionfinal IntVar[]
It specifies variable idNumber to count the number of occurences of the specified value in a list.final IntVar
final IntVar[]
(package private) static final AtomicInteger
final IntVar[]
The list of variables which are checked and counted if equal to specified value.private final int
final int[]
The value to which is any variable is equal to makes the constraint count it.(package private) final IntDomain
(package private) final IntDomain
Fields inherited from class org.jacop.constraints.Constraint
afcWeight, atomicExecution, consistencyPruningEvents, constraintScope, earlyTerminationOK, increaseWeight, numberId, scope, trace, watchedVariableGrounded
Fields inherited from class org.jacop.constraints.DecomposedConstraint
queueIndex
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Constructor Summary
ConstructorsConstructorDescriptionCountValues
(List<? extends IntVar> list, IntVar[] counter, int[] values) It constructs a CountValues constraint.CountValues
(IntVar[] list, IntVar[] counter, int[] values) It constructs a CountValues constraint. -
Method Summary
Modifier and TypeMethodDescriptionvoid
consistency
(Store store) It is a (most probably incomplete) consistency function which removes the values from variables domains.int
void
It imposes the constraint in a given store.boolean
It checks if the constraint is satisfied.private void
swap
(int i, int j) 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, imposeDecomposition, increaseWeight, intArrayToString, long2int, numberArgs, queueVariable, removeConstraint, requiresMonotonicity, setConsistencyPruningEvent, setConstraintScope, setScope, setScope, setScope, setScope, setScope, setWatchedVariableGrounded, supplyGuideFeedback, toInt, toInt, updateAFC, watchedVariableGrounded
Methods inherited from class org.jacop.constraints.DecomposedConstraint
auxiliaryVariables, checkInput, checkInput, checkInputForDuplication, checkInputForDuplicationSkipSingletons, checkInputForNullness, checkInputForNullness, checkInputForNullness, derivative, getDubletonsSkipSingletons, imposeDecomposition
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Field Details
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idNumber
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counter
It specifies variable idNumber to count the number of occurences of the specified value in a list. -
counterRest
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extendedCounter
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list
The list of variables which are checked and counted if equal to specified value. -
n
private final int n -
values
public final int[] valuesThe value to which is any variable is equal to makes the constraint count it. -
valuesDomain
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valuesDomainComplement
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position
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equal
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rest
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Constructor Details
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CountValues
It constructs a CountValues constraint.- Parameters:
values
- values that are countedlist
- variables which equality to values is counted.counter
- number of variables equal to a value.
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CountValues
It constructs a CountValues constraint.- Parameters:
values
- value taht are countedlist
- variables which equality to values is counted.counter
- number of variables equal to values.
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Method Details
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impose
Description copied from class:Constraint
It imposes the constraint in a given store.- Overrides:
impose
in classConstraint
- Parameters:
store
- the constraint store to which the constraint is imposed to.
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getDefaultConsistencyPruningEvent
public int getDefaultConsistencyPruningEvent()- Specified by:
getDefaultConsistencyPruningEvent
in classConstraint
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consistency
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 classConstraint
- Parameters:
store
- constraint store within which the constraint consistency is being checked.
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swap
private void swap(int i, int j) -
satisfied
public boolean satisfied()Description copied from interface:SatisfiedPresent
It checks if the constraint is satisfied. It can return false even if constraint is satisfied but not all variables in its scope are grounded. It needs to return true if all variables in its scope are grounded and constraint is satisfied.Implementations of this interface for constraints that are not PrimitiveConstraint may require constraint imposition and consistency check as a requirement to work correctly.
- Specified by:
satisfied
in interfaceSatisfiedPresent
- Returns:
- true if constraint is possible to verify that it is satisfied.
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toString
Description copied from class:Constraint
It produces a string representation of a constraint state.- Overrides:
toString
in classConstraint
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