public class Lex extends Constraint
Modifier and Type | Field and Description |
---|---|
SetVar |
a
It specifies a list on which element a lex relationship holds for every
two consecutive variables.
|
SetVar |
b
It specifies a list on which element a lex relationship holds for every
two consecutive variables.
|
protected int |
inclusionLevel |
protected TimeStamp<IntDomain> |
inDifference |
protected int |
inSupport |
protected TimeStamp<IntDomain> |
smallerDifference |
protected int |
smallerElLevel |
protected int |
smallerElSupport |
boolean |
strict
It specifies if the relation is strict or not.
|
static String[] |
xmlAttributes
It specifies the arguments required to be saved by an XML format as well as
the constructor being called to recreate an object from an XML format.
|
atomicExecution, consistencyPruningEvents, earlyTerminationOK, id, increaseWeight, numberArgs, numberId, trace
queueIndex
Constructor and Description |
---|
Lex(SetVar a,
SetVar b)
It constructs an Lexical ordering constraint to restrict the domain of the variables a and b.
|
Lex(SetVar a,
SetVar b,
boolean strict)
It constructs an Lexical ordering constraint to restrict the domain of the variables a and b.
|
Modifier and Type | Method and Description |
---|---|
ArrayList<Var> |
arguments()
It returns the variables in a scope of the constraint.
|
void |
consistency(Store store)
It is a (most probably incomplete) consistency function which removes the
values from variables domains.
|
int |
getConsistencyPruningEvent(Var var)
It retrieves the pruning event which causes reevaluation of the
constraint.
|
String |
id()
It gives the id string of a constraint.
|
void |
impose(Store store)
It imposes the constraint in a given store.
|
void |
increaseWeight()
It increases the weight of the variables in the constraint scope.
|
void |
removeConstraint()
It removes the constraint by removing this constraint from all variables.
|
void |
removeLevel(int level)
This function is called in case of the backtrack, so a constraint can
clear the queue of changed variables which is no longer valid.
|
boolean |
satisfied()
It checks if the constraint is satisfied.
|
String |
toString()
It produces a string representation of a constraint state.
|
cleanAfterFailure, decompose, getGuideConstraint, getGuideValue, getGuideVariable, impose, imposeDecomposition, numberArgs, queueVariable, removeLevelLate, requiresMonotonicity, setConsistencyPruningEvent, supplyGuideFeedback
auxiliaryVariables, derivative, imposeDecomposition
public SetVar a
public SetVar b
public boolean strict
public static String[] xmlAttributes
protected int inSupport
protected int inclusionLevel
protected int smallerElSupport
protected int smallerElLevel
public Lex(SetVar a, SetVar b)
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.public Lex(SetVar a, SetVar b, boolean strict)
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.strict
- specifies if the lex relation is strict.public ArrayList<Var> arguments()
Constraint
arguments
in class Constraint
public void consistency(Store store)
Constraint
consistency
in class Constraint
store
- constraint store within which the constraint consistency is being checked.public int getConsistencyPruningEvent(Var var)
Constraint
getConsistencyPruningEvent
in class Constraint
var
- variable for which pruning event is retrievedpublic String id()
Constraint
id
in class Constraint
public void impose(Store store)
Constraint
impose
in class Constraint
store
- the constraint store to which the constraint is imposed to.public void removeLevel(int level)
Constraint
removeLevel
in class Constraint
level
- the level which is being removed.public void removeConstraint()
Constraint
removeConstraint
in class Constraint
public boolean satisfied()
Constraint
satisfied
in class Constraint
public String toString()
Constraint
toString
in class Constraint
public void increaseWeight()
Constraint
increaseWeight
in class Constraint
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