Package org.jacop.set.constraints
Class AintersectBeqC
- 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.set.constraints.AintersectBeqC
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- All Implemented Interfaces:
SatisfiedPresent
,UsesQueueVariable
public class AintersectBeqC extends Constraint implements UsesQueueVariable, SatisfiedPresent
It creates a constraint that makes sure that A intersected with B is equal to C. A /\ B = C.- Version:
- 4.7
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Field Summary
Fields Modifier and Type Field Description SetVar
a
It specifies set variable a.private boolean
aHasChanged
SetVar
b
It specifies set variable b.private boolean
bHasChanged
SetVar
c
It specifies set variable c.private boolean
cHasChanged
(package private) static java.util.concurrent.atomic.AtomicInteger
idNumber
boolean
performCardinalityReasoning
It specifies if the constrain attempts to perform expensive and yet unlikely propagation due to cardinality information.-
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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Constructor Summary
Constructors Constructor Description AintersectBeqC(SetVar a, SetVar b, SetVar c)
It constructs an AintersectBeqC constraint.
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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()
void
queueVariable(int level, Var variable)
This is a function called to indicate which variable in a scope of constraint has changed.boolean
satisfied()
It checks if the constraint is satisfied.java.lang.String
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, 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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Field Detail
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idNumber
static java.util.concurrent.atomic.AtomicInteger idNumber
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a
public SetVar a
It specifies set variable a.
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b
public SetVar b
It specifies set variable b.
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c
public SetVar c
It specifies set variable c.
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performCardinalityReasoning
public boolean performCardinalityReasoning
It specifies if the constrain attempts to perform expensive and yet unlikely propagation due to cardinality information.
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aHasChanged
private boolean aHasChanged
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bHasChanged
private boolean bHasChanged
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cHasChanged
private boolean cHasChanged
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Constructor Detail
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AintersectBeqC
public AintersectBeqC(SetVar a, SetVar b, SetVar c)
It constructs an AintersectBeqC constraint.- Parameters:
a
- set variable a, which is being intersected with set variable b.b
- set variable b, which is being intersected with set variable a.c
- variable that is restricted to be the intersection of a and b.
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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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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
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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queueVariable
public void queueVariable(int level, Var variable)
Description copied from class:Constraint
This is a function called to indicate which variable in a scope of constraint has changed. It also indicates a store level at which the change has occurred.- Overrides:
queueVariable
in classConstraint
- Parameters:
level
- the level of the store at which the change has occurred.variable
- variable which has changed.
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