Package org.jacop.set.constraints
Class AeqB
java.lang.Object
org.jacop.constraints.DecomposedConstraint<Constraint>
org.jacop.constraints.Constraint
org.jacop.constraints.PrimitiveConstraint
org.jacop.set.constraints.AeqB
- All Implemented Interfaces:
SatisfiedPresent
,StoreAware
It creates an equality constraint to make sure that two set variables
have the same value.
- Version:
- 4.8
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Field Summary
FieldsModifier and TypeFieldDescriptionIt specifies set variable a, which must be equal to set variable b.It specifies set variable b, which must be equal to set variable a.(package private) static AtomicInteger
Fields inherited from class org.jacop.constraints.PrimitiveConstraint
notConsistencyPruningEvents
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
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
consistency
(Store store) It is a (most probably incomplete) consistency function which removes the values from variables domains.int
protected int
protected int
protected int
void
notConsistency
(Store store) It makes pruning in such a way that constraint is notConsistent.boolean
It checks if constraint would be always not satisfied.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.PrimitiveConstraint
getNestedPruningEvent, getNotConsistencyPruningEvent, impose, include, setNotConsistencyPruningEvent
Methods inherited from class org.jacop.constraints.Constraint
afc, arguments, cleanAfterFailure, decompose, getConsistencyPruningEvent, getGuideConstraint, getGuideValue, getGuideVariable, grounded, grounded, id, 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 set variable a, which must be equal to set variable b. -
b
It specifies set variable b, which must be equal to set variable a.
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Constructor Details
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AeqB
It constructs an AeqB constraint to restrict the domain of the variables.- Parameters:
a
- variable a restricted to be equal to b.b
- variable b restricted to be equal to a.
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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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notConsistency
Description copied from class:PrimitiveConstraint
It makes pruning in such a way that constraint is notConsistent. It removes values which always belong to a solution.- Specified by:
notConsistency
in classPrimitiveConstraint
- Parameters:
store
- the constraint store in which context the notConsistency technique is evaluated.
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notSatisfied
public boolean notSatisfied()Description copied from class:PrimitiveConstraint
It checks if constraint would be always not satisfied.- Specified by:
notSatisfied
in classPrimitiveConstraint
- Returns:
- true if constraint must be notSatisfied, false otherwise.
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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.
- Returns:
- true if constraint is possible to verify that it is satisfied.
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getDefaultNestedNotConsistencyPruningEvent
protected int getDefaultNestedNotConsistencyPruningEvent()- Overrides:
getDefaultNestedNotConsistencyPruningEvent
in classPrimitiveConstraint
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getDefaultNestedConsistencyPruningEvent
protected int getDefaultNestedConsistencyPruningEvent()- Overrides:
getDefaultNestedConsistencyPruningEvent
in classPrimitiveConstraint
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getDefaultNotConsistencyPruningEvent
protected int getDefaultNotConsistencyPruningEvent()- Specified by:
getDefaultNotConsistencyPruningEvent
in classPrimitiveConstraint
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getDefaultConsistencyPruningEvent
public int getDefaultConsistencyPruningEvent()- Specified by:
getDefaultConsistencyPruningEvent
in classConstraint
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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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