choco.integer.constraints
Class ElementV

java.lang.Object
  choco.AbstractEntity
      choco.AbstractConstraint
          choco.integer.constraints.AbstractIntConstraint
              choco.integer.constraints.AbstractLargeIntConstraint
                  choco.integer.constraints.ElementV

All Implemented Interfaces:

Constraint, Entity, IntConstraint, IntVarEventListener, VarEventListener, Propagator, java.lang.Cloneable, java.util.EventListener

public class ElementV
extends AbstractLargeIntConstraint

A class implementing the constraint A[I] == X, with I and X being IntVars and A an array of IntVars

Field Summary

protected StoredBool	indexUpdateNeeded
protected StoredBool	valueUpdateNeeded

Fields inherited from class choco.integer.constraints.AbstractLargeIntConstraint

cIndices, cste, vars

Fields inherited from class choco.integer.constraints.AbstractIntConstraint

logger

Fields inherited from class choco.AbstractConstraint

active, constAwakeEvent, hook, priority

Fields inherited from class choco.AbstractEntity

problem

Constructor Summary

ElementV(IntDomainVar[] vars, int offset)

Method Summary

void	awake() Default initial propagation: full constraint re-propagation.
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.
void	awakeOnVar(int idx) Default propagation on variable revision: full constraint re-propagation.
java.lang.Object	clone() returns a copy of the constraint.
protected void	equalityBehaviour()
protected IntDomainVar	getIndexVar()
protected IntDomainVar	getValueVar()
java.lang.Boolean	isEntailed() Checks whether the constraint is definitely satisfied, no matter what further restrictions occur to the domain of its variables.
boolean	isSatisfied() Semantic: Testing if the constraint is satisfied.
java.lang.String	pretty() pretty printing of the object.
void	propagate() Propagates the constraint awake events.
java.lang.String	toString()
protected void	updateIndexFromValue()
protected void	updateValueFromIndex()

Methods inherited from class choco.integer.constraints.AbstractLargeIntConstraint

assignIndices, getConstraintIdx, getIntVar, getNbVars, getVar, isCompletelyInstantiated, setConstraintIndex, setVar

Methods inherited from class choco.integer.constraints.AbstractIntConstraint

awakeOnBounds, awakeOnRemovals, getSelfIndex, isConsistent

Methods inherited from class choco.AbstractConstraint

addListener, connectVar, constAwake, delete, fail, getEvent, getPlugIn, getPriority, getProblem, getVarIdxInOpposite, isActive, isEquivalentTo, opposite, setActive, setEntailed, setPassive, setPlugIn, substituteVar

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface choco.Propagator

constAwake, delete, getEvent, getPlugIn, getPriority

Methods inherited from interface choco.prop.VarEventListener

addListener, isActive, setActive, setPassive

Methods inherited from interface choco.prop.VarEventListener

addListener, isActive, setActive, setPassive

Field Detail

valueUpdateNeeded

protected StoredBool valueUpdateNeeded

indexUpdateNeeded

protected StoredBool indexUpdateNeeded

Constructor Detail

ElementV

public ElementV(IntDomainVar[] vars,
                int offset)

Method Detail

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Description copied from interface: Constraint

returns a copy of the constraint. This copy is a new object, may be a recursive copy in case of composite constraints. The original and the copy share the same variables & plugins

Specified by:

clone in interface Constraint

Overrides:

clone in class AbstractLargeIntConstraint

Returns:

Throws:

java.lang.CloneNotSupportedException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

pretty

public java.lang.String pretty()

Description copied from interface: Entity

pretty printing of the object. This String is not constant and may depend on the context.

Specified by:

pretty in interface Entity

Overrides:

pretty in class AbstractEntity

Returns:

a readable string representation of the object

getIndexVar

protected IntDomainVar getIndexVar()

getValueVar

protected IntDomainVar getValueVar()

isSatisfied

public boolean isSatisfied()

Description copied from interface: Constraint

Semantic: Testing if the constraint is satisfied. Note that all variables involved in the constraint must be instantiated when this method is called.

updateValueFromIndex

protected void updateValueFromIndex()
                             throws ContradictionException

Throws:

ContradictionException

updateIndexFromValue

protected void updateIndexFromValue()
                             throws ContradictionException

Throws:

ContradictionException

equalityBehaviour

protected void equalityBehaviour()
                          throws ContradictionException

Throws:

ContradictionException

awake

public void awake()
           throws ContradictionException

Description copied from class: AbstractConstraint

Default initial propagation: full constraint re-propagation.

Specified by:

awake in interface Propagator

Overrides:

awake in class AbstractConstraint

Throws:

ContradictionException

propagate

public void propagate()
               throws ContradictionException

Description copied from class: AbstractLargeIntConstraint

Propagates the constraint awake events.

Specified by:

propagate in interface Propagator

Overrides:

propagate in class AbstractLargeIntConstraint

Throws:

ContradictionException

awakeOnInf

public void awakeOnInf(int idx)
                throws ContradictionException

Description copied from class: AbstractIntConstraint

Default propagation on improved lower bound: propagation on domain revision.

Specified by:

awakeOnInf in interface IntVarEventListener

Overrides:

awakeOnInf in class AbstractIntConstraint

Throws:

ContradictionException

awakeOnSup

public void awakeOnSup(int idx)
                throws ContradictionException

Description copied from class: AbstractIntConstraint

Default propagation on improved upper bound: propagation on domain revision.

Specified by:

awakeOnSup in interface IntVarEventListener

Overrides:

awakeOnSup in class AbstractIntConstraint

Throws:

ContradictionException

awakeOnInst

public void awakeOnInst(int idx)
                 throws ContradictionException

Description copied from class: AbstractIntConstraint

Default propagation on instantiation: full constraint re-propagation.

Specified by:

awakeOnInst in interface IntVarEventListener

Overrides:

awakeOnInst in class AbstractIntConstraint

Throws:

ContradictionException

awakeOnRem

public void awakeOnRem(int idx,
                       int x)
                throws ContradictionException

Description copied from class: AbstractIntConstraint

Default propagation on one value removal: propagation on domain revision.

Specified by:

awakeOnRem in interface IntVarEventListener

Overrides:

awakeOnRem in class AbstractIntConstraint

Throws:

ContradictionException

awakeOnVar

public void awakeOnVar(int idx)
                throws ContradictionException

Description copied from class: AbstractConstraint

Default propagation on variable revision: full constraint re-propagation.

Specified by:

awakeOnVar in interface VarEventListener

Specified by:

awakeOnVar in interface Propagator

Overrides:

awakeOnVar in class AbstractConstraint

Throws:

ContradictionException

isEntailed

public java.lang.Boolean isEntailed()

Description copied from interface: Propagator

Checks whether the constraint is definitely satisfied, no matter what further restrictions occur to the domain of its variables.

Specified by:

isEntailed in interface Propagator

Overrides:

isEntailed in class AbstractConstraint