Package org.jacop.set.constraints
Class AleB
- java.lang.Object
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- org.jacop.constraints.DecomposedConstraint<Constraint>
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- org.jacop.constraints.Constraint
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- org.jacop.constraints.PrimitiveConstraint
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- org.jacop.set.constraints.AleB
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- All Implemented Interfaces:
SatisfiedPresent
,StoreAware
public class AleB extends PrimitiveConstraint
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:
- 4.8
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Field Summary
Fields Modifier and Type Field Description SetVar
a
It specifies the first variable of the constraint(package private) AltB
aGTb
Negated constraintSetVar
b
It specifies the second variable of the constraint(package private) static java.util.concurrent.atomic.AtomicInteger
idNumber
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Fields inherited from class org.jacop.constraints.PrimitiveConstraint
notConsistencyPruningEvents
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Fields inherited from class org.jacop.constraints.Constraint
atomicExecution, consistencyPruningEvents, constraintScope, earlyTerminationOK, increaseWeight, numberId, scope, trace
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Fields inherited from class org.jacop.constraints.DecomposedConstraint
queueIndex
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
consistency(Store store)
It is a (most probably incomplete) consistency function which removes the values from variables domains.int
getDefaultConsistencyPruningEvent()
protected int
getDefaultNestedConsistencyPruningEvent()
protected int
getDefaultNestedNotConsistencyPruningEvent()
protected int
getDefaultNotConsistencyPruningEvent()
void
impose(Store store)
It imposes the constraint in a given store.void
notConsistency(Store store)
It makes pruning in such a way that constraint is notConsistent.boolean
notSatisfied()
It checks if constraint would be always not satisfied.boolean
satisfied()
It checks if the constraint is satisfied.(package private) boolean
setLexLE(IntDomain x, IntDomain y)
java.lang.String
toString()
It produces a string representation of a constraint state.-
Methods inherited from class org.jacop.constraints.PrimitiveConstraint
getNestedPruningEvent, getNotConsistencyPruningEvent, include, setNotConsistencyPruningEvent
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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
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Methods inherited from class org.jacop.constraints.DecomposedConstraint
auxiliaryVariables, checkInput, checkInput, checkInputForDuplication, checkInputForDuplicationSkipSingletons, checkInputForNullness, checkInputForNullness, checkInputForNullness, derivative, getDubletonsSkipSingletons, imposeDecomposition
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Constructor Detail
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AleB
public AleB(SetVar a, SetVar b)
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
AleB(SetVar a, SetVar b, boolean negated)
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 Detail
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consistency
public void consistency(Store store)
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
public void notConsistency(Store store)
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
public void impose(Store store)
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
public java.lang.String toString()
Description copied from class:Constraint
It produces a string representation of a constraint state.- Overrides:
toString
in classConstraint
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