Alldifferent (jacop 4.2.0 API)

java.lang.Object
- org.jacop.constraints.DecomposedConstraint
- - org.jacop.constraints.Constraint
  - - org.jacop.constraints.Alldifferent

Direct Known Subclasses:

Alldiff
```
public class Alldifferent
extends Constraint
```
Alldifferent constraint assures that all FDVs has differnet values. It uses partial consistency technique.

Version:

4.2

Author:

Krzysztof Kuchcinski and Radoslaw Szymanek

Field Summary

Fields
Modifier and Type	Field and Description
`protected TimeStamp<Integer>`	`grounded`
`IntVar[]`	`list` It specifies a list of variables which must take different values.
`protected HashMap<IntVar,Integer>`	`positionMapping`
`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.

Fields inherited from class org.jacop.constraints.Constraint
atomicExecution, consistencyPruningEvents, earlyTerminationOK, id, increaseWeight, numberArgs, numberId, trace

Fields inherited from class org.jacop.constraints.DecomposedConstraint
queueIndex

Constructor Summary

Constructors
Constructor and Description
`Alldifferent(ArrayList<? extends IntVar> variables)` It constructs the alldifferent constraint for the supplied variable.
`Alldifferent(IntVar[] list)` It constructs the alldifferent constraint for the supplied variable.

Method Summary

All Methods Instance Methods Concrete Methods
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.
`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`	`queueVariable(int level, Var V)` This is a function called to indicate which variable in a scope of constraint has changed.
`void`	`removeConstraint()` It removes the constraint by removing this constraint from all variables.
`boolean`	`satisfied()` It checks if the constraint is satisfied.
`String`	`toString()` It produces a string representation of a constraint state.

Methods inherited from class org.jacop.constraints.Constraint
cleanAfterFailure, decompose, getGuideConstraint, getGuideValue, getGuideVariable, id, impose, imposeDecomposition, numberArgs, removeLevel, removeLevelLate, requiresMonotonicity, setConsistencyPruningEvent, supplyGuideFeedback

Methods inherited from class org.jacop.constraints.DecomposedConstraint
auxiliaryVariables, derivative, imposeDecomposition

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - list
```
public IntVar[] list
```
    It specifies a list of variables which must take different values.
  - positionMapping
```
protected HashMap<IntVar,Integer> positionMapping
```
  - grounded
```
protected TimeStamp<Integer> grounded
```
  - xmlAttributes
```
public 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.
- Constructor Detail
  - Alldifferent
```
public Alldifferent(IntVar[] list)
```
    It constructs the alldifferent constraint for the supplied variable.
    
    Parameters:
    
    list - variables which are constrained to take different values.
  - Alldifferent
```
public Alldifferent(ArrayList<? extends IntVar> variables)
```
    It constructs the alldifferent constraint for the supplied variable.
    
    Parameters:
    
    variables - variables which are constrained to take different values.
- Method Detail
  - arguments
```
public ArrayList<Var> arguments()
```
    Description copied from class: Constraint
    
    It returns the variables in a scope of the constraint.
    
    Specified by:
    
    arguments in class Constraint
    
    Returns:
    
    variables in a scope of the constraint.
  - 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 class Constraint
    
    Parameters:
    
    store - constraint store within which the constraint consistency is being checked.
  - getConsistencyPruningEvent
```
public int getConsistencyPruningEvent(Var var)
```
    Description copied from class: Constraint
    
    It retrieves the pruning event which causes reevaluation of the constraint.
    
    Specified by:
    
    getConsistencyPruningEvent in class Constraint
    
    Parameters:
    
    var - variable for which pruning event is retrieved
    
    Returns:
    
    it returns the int code of the pruning event (GROUND, BOUND, ANY, NONE)
  - satisfied
```
public boolean satisfied()
```
    Description copied from class: Constraint
    
    It checks if the constraint is satisfied. If this function is incorrectly implemented a constraint may not be satisfied in a solution.
    
    Specified by:
    
    satisfied in class Constraint
    
    Returns:
    
    true if the constraint is for certain satisfied, false otherwise.
  - impose
```
public void impose(Store store)
```
    Description copied from class: Constraint
    
    It imposes the constraint in a given store.
    
    Specified by:
    
    impose in class Constraint
    
    Parameters:
    
    store - the constraint store to which the constraint is imposed to.
  - queueVariable
```
public void queueVariable(int level,
                          Var V)
```
    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 class Constraint
    
    Parameters:
    
    level - the level of the store at which the change has occurred.
    
    V - variable which has changed.
  - removeConstraint
```
public void removeConstraint()
```
    Description copied from class: Constraint
    
    It removes the constraint by removing this constraint from all variables.
    
    Specified by:
    
    removeConstraint in class Constraint
  - toString
```
public String toString()
```
    Description copied from class: Constraint
    
    It produces a string representation of a constraint state.
    
    Specified by:
    
    toString in class Constraint
  - increaseWeight
```
public void increaseWeight()
```
    Description copied from class: Constraint
    
    It increases the weight of the variables in the constraint scope.
    
    Specified by:
    
    increaseWeight in class Constraint

Class Alldifferent

Field Summary

Fields inherited from class org.jacop.constraints.Constraint

Fields inherited from class org.jacop.constraints.DecomposedConstraint

Constructor Summary

Method Summary

Methods inherited from class org.jacop.constraints.Constraint

Methods inherited from class org.jacop.constraints.DecomposedConstraint

Methods inherited from class java.lang.Object

Field Detail

list

positionMapping

grounded

xmlAttributes

Constructor Detail

Alldifferent

Alldifferent

Method Detail

arguments

consistency

getConsistencyPruningEvent

satisfied

impose

queueVariable

removeConstraint

toString

increaseWeight