Package org.jacop.set.constraints
Class CardA
java.lang.Object
org.jacop.constraints.DecomposedConstraint<Constraint>
org.jacop.constraints.Constraint
org.jacop.set.constraints.CardA
- All Implemented Interfaces:
SatisfiedPresent
The set cardinality constraint.
- Version:
- 4.8
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Field Summary
FieldsModifier and TypeFieldDescriptionIt specifies a set variable x which is being restricted.It specifies variable c specifying the possible cardinality of variable x.(package private) static AtomicInteger
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
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Constructor Summary
ConstructorsModifierConstructorDescriptionprivate
It constructs a cardinality constraint to restrict the number of elements in the set assigned to a set variable a.It constructs a cardinality constraint to restrict the number of elements in the set assigned to set variable a.It constructs a cardinality constraint to restrict the number of elements in the set assigned to set variable a. -
Method Summary
Modifier and TypeMethodDescriptionvoid
consistency
(Store store) It is a (most probably incomplete) consistency function which removes the values from variables domains.int
boolean
It checks if the constraint is satisfied.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
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Field Details
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idNumber
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a
It specifies a set variable x which is being restricted. -
cardinality
It specifies variable c specifying the possible cardinality of variable x.
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Constructor Details
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CardA
It constructs a cardinality constraint to restrict the number of elements in the set assigned to a set variable a.- Parameters:
a
- variable that is restricted to have the cardinality c.c
- the value specifying cardinality of variable a.
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CardA
It constructs a cardinality constraint to restrict the number of elements in the set assigned to set variable a.- Parameters:
a
- variable that is restricted to have the cardinality c.c
- domain for the cardinality variable.
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CardA
It constructs a cardinality constraint to restrict the number of elements in the set assigned to set variable a.- Parameters:
a
- variable that is restricted to have the cardinality [min, max].min
- the minimum value possible for the cardinality of a.max
- the maximum value possible for the cardinality of a.
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CardA
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Method Details
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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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getDefaultConsistencyPruningEvent
public int getDefaultConsistencyPruningEvent()- Specified by:
getDefaultConsistencyPruningEvent
in classConstraint
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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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