choco.cp.solver.constraints.integer
Class InverseChannelingWithinRange

java.lang.Object
  extended by choco.kernel.solver.propagation.Propagator
      extended by choco.kernel.solver.constraints.AbstractSConstraint<IntDomainVar>
          extended by choco.kernel.solver.constraints.integer.AbstractIntSConstraint
              extended by choco.kernel.solver.constraints.integer.AbstractLargeIntSConstraint
                  extended by choco.cp.solver.constraints.integer.InverseChannelingWithinRange
All Implemented Interfaces:
IExtensionnable, IPretty, SConstraint<IntDomainVar>, IntPropagator, Cloneable, EventListener

public class InverseChannelingWithinRange
extends AbstractLargeIntSConstraint

Created by IntelliJ IDEA. User: njussien Date: 26/04/11 Time: 13:24

X collection int-variable Y collection int-variable

if the ith variable of the collection X is assigned to j and if j is less than or equal to the number of items of the collection Y then the jth variable of the collection Y is assigned to i. Conversely, if the jth variable of the collection Y is assigned to i and if i is less than or equal to the number of items of the collection X then the ith variable of the collection X is assigned to j.

note : this version (as inverseChanneling) takes into account on offset defined as the minimum value of the first variable of the X sequence

derived from inverseChanneling

see inverse_within_range


Field Summary
protected  int nbx
           
protected  int nby
           
 
Fields inherited from class choco.kernel.solver.constraints.AbstractSConstraint
cIndices, constraintType, extensions, vars
 
Fields inherited from class choco.kernel.solver.propagation.Propagator
active, constAwakeEvent, priority, propagationEngine
 
Fields inherited from interface choco.kernel.solver.constraints.SConstraint
LOGGER
 
Constructor Summary
InverseChannelingWithinRange(IntDomainVar[] allVars, int n)
          link x and y so that x[i] = j <=> y[j] = i It is used to maintain both models on permutation problems
 
Method Summary
 void awakeOnInf(int idx)
          Default propagation on improved lower bound: propagation on domain revision.
 void awakeOnInst(int idx)
          Default propagation on instantiation: full constraint re-propagation.
 void awakeOnRem(int idx, int x)
          Default propagation on one value removal: propagation on domain revision.
 void awakeOnSup(int idx)
          Default propagation on improved upper bound: propagation on domain revision.
 int getFilteredEventMask(int idx)
           
 boolean isSatisfied(int[] tuple)
          TEMPORARY: if not overriden by the constraint, throws an error to avoid bug using reified constraints in constraints that have not been changed to fulfill this api yet !
 String pretty()
          pretty printing of the object.
 void propagate()
          Propagation: Propagating the constraint until local consistency is reached.
 
Methods inherited from class choco.kernel.solver.constraints.integer.AbstractIntSConstraint
awakeOnBounds, awakeOnRemovals, getConstraintType, isConsistent, isSatisfied
 
Methods inherited from class choco.kernel.solver.constraints.AbstractSConstraint
addExtension, addListener, clone, getAbstractSConstraintExtensionNumber, getConstraintIdx, getExtension, getFineDegree, getNbVarNotInst, getNbVars, getVar, getVarQuick, isCompletelyInstantiated, isEntailed, opposite, setConstraintIndex, setExtension, setVar, toString
 
Methods inherited from class choco.kernel.solver.propagation.Propagator
activate, awake, constAwake, fail, getEvent, getPriority, isActive, setActive, setActiveSilently, setEntailed, setPassive, setPropagationEngine
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

nbx

protected int nbx

nby

protected int nby
Constructor Detail

InverseChannelingWithinRange

public InverseChannelingWithinRange(IntDomainVar[] allVars,
                                    int n)
link x and y so that x[i] = j <=> y[j] = i It is used to maintain both models on permutation problems

Parameters:
allVars - arrays of variables (x + y)
n - nb of x
Method Detail

getFilteredEventMask

public int getFilteredEventMask(int idx)
Overrides:
getFilteredEventMask in class Propagator

propagate

public void propagate()
               throws ContradictionException
Description copied from class: Propagator
Propagation: Propagating the constraint until local consistency is reached.

Specified by:
propagate in class Propagator
Throws:
ContradictionException - contradiction exception

awakeOnInf

public void awakeOnInf(int idx)
                throws ContradictionException
Description copied from class: AbstractIntSConstraint
Default propagation on improved lower bound: propagation on domain revision.

Specified by:
awakeOnInf in interface IntPropagator
Overrides:
awakeOnInf in class AbstractIntSConstraint
Throws:
ContradictionException

awakeOnSup

public void awakeOnSup(int idx)
                throws ContradictionException
Description copied from class: AbstractIntSConstraint
Default propagation on improved upper bound: propagation on domain revision.

Specified by:
awakeOnSup in interface IntPropagator
Overrides:
awakeOnSup in class AbstractIntSConstraint
Throws:
ContradictionException

awakeOnRem

public void awakeOnRem(int idx,
                       int x)
                throws ContradictionException
Description copied from class: AbstractIntSConstraint
Default propagation on one value removal: propagation on domain revision.

Specified by:
awakeOnRem in interface IntPropagator
Overrides:
awakeOnRem in class AbstractIntSConstraint
Throws:
ContradictionException

awakeOnInst

public void awakeOnInst(int idx)
                 throws ContradictionException
Description copied from class: AbstractIntSConstraint
Default propagation on instantiation: full constraint re-propagation.

Specified by:
awakeOnInst in interface IntPropagator
Overrides:
awakeOnInst in class AbstractIntSConstraint
Throws:
ContradictionException

isSatisfied

public boolean isSatisfied(int[] tuple)
Description copied from class: AbstractIntSConstraint
TEMPORARY: if not overriden by the constraint, throws an error to avoid bug using reified constraints in constraints that have not been changed to fulfill this api yet !

Specified by:
isSatisfied in interface IntPropagator
Overrides:
isSatisfied in class AbstractIntSConstraint

pretty

public String pretty()
Description copied from interface: IPretty
pretty printing of the object. This String is not constant and may depend on the context.

Specified by:
pretty in interface IPretty
Overrides:
pretty in class AbstractSConstraint<IntDomainVar>
Returns:
a readable string representation of the object


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