Package org.jacop.set.constraints
Class AleB
java.lang.Object
org.jacop.constraints.DecomposedConstraint<Constraint>
org.jacop.constraints.Constraint
org.jacop.constraints.PrimitiveConstraint
org.jacop.set.constraints.AleB
- All Implemented Interfaces:
SatisfiedPresent
,StoreAware
It creates a <= b constraint on two set variables. The
set variables are constrained to be lexicographically ordered.
For example, {}<=lex {} {}<=lex {1} {1, 2}<=lex {1, 2} {1, 3}<=lex {2} {1}<= {2}
- Version:
- 4.9
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Field Summary
FieldsModifier and TypeFieldDescriptionIt specifies the first variable of the constraint(package private) AltB
Negated constraintIt specifies the second variable of the constraint(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
It imposes the constraint in a given store.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.(package private) boolean
toString()
It produces a string representation of a constraint state.Methods inherited from class org.jacop.constraints.PrimitiveConstraint
getNestedPruningEvent, getNotConsistencyPruningEvent, 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, long2int, 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 the first variable of the constraint -
b
It specifies the second variable of the constraint -
aGTb
AltB aGTbNegated constraint
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Constructor Details
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AleB
It constructs an Lexical ordering constraint to restrict the domain of the variables a and b.- Parameters:
a
- variable that is restricted to be less than b with lexical order.b
- variable that is restricted to be greater than a with lexical order.
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AleB
It constructs an Lexical ordering to be used in negated constrained. Not to be used for imposing constraints.- Parameters:
a
- variable that is restricted to be less than b with lexical order.b
- variable that is restricted to be greater than a with lexical order.negated
- used to distinguish constructors only.
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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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setLexLE
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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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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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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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getDefaultNestedConsistencyPruningEvent
protected int getDefaultNestedConsistencyPruningEvent()- Overrides:
getDefaultNestedConsistencyPruningEvent
in classPrimitiveConstraint
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getDefaultNestedNotConsistencyPruningEvent
protected int getDefaultNestedNotConsistencyPruningEvent()- Overrides:
getDefaultNestedNotConsistencyPruningEvent
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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impose
Description copied from class:Constraint
It imposes the constraint in a given store.- Overrides:
impose
in classPrimitiveConstraint
- Parameters:
store
- the constraint store to which the constraint is imposed to.
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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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