Package org.jacop.constraints.netflow

Class DomainStructure

java.lang.Object

org.jacop.constraints.netflow.DomainStructure

All Implemented Interfaces:

VarHandler

public class DomainStructure
extends Object
implements VarHandler

A domain based structure variable.

Arcs can be associated to sub-domains of the structure variable. The state of the arc is said to be active if the variable takes a value from its sub-domain and it is inactive otherwise.

Version:

4.10

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	DomainStructure.Behavior

Field Summary

Fields

Modifier and Type	Field	Description
final Arc[]	arcs
final DomainStructure.Behavior	behavior
final IntDomain[]	domains
int	notGrounded
final IntVar	variable

Constructor Summary

Constructors

Constructor	Description
DomainStructure(IntVar variable, List<Domain> domList, List<Arc> arcList)	Creates an S-variable
DomainStructure(IntVar variable, IntDomain[] domains, Arc[] arcs)
DomainStructure(IntVar variable, IntDomain[] domains, Arc[] arcs, DomainStructure.Behavior behavior)

Method Summary

Modifier and Type	Method	Description
int	getPruningEvent(Var var)	Retrieves the consistency pruning event of a handler variable that causes the handler to be reevaluated.
private void	groundArc(int arcID, boolean active, MutableNetwork network)
boolean	isGrounded(int arcID)
List<IntVar>	listVariables()
void	processEvent(IntVar variable, MutableNetwork network)	Informs the handler that one of its variable has changed and asks the handler to update the state of the network accordingly.
private void	swap(int i, int j)
void	ungroundArc(int arcID)

Methods inherited from class java.lang.Object

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

Field Details

variable

public final IntVar variable

arcs

public final Arc[] arcs

domains

public final IntDomain[] domains

behavior

public final DomainStructure.Behavior behavior

notGrounded

public int notGrounded

Constructor Details

DomainStructure

public DomainStructure(IntVar variable,
 List<Domain> domList,
 List<Arc> arcList)

Creates an S-variable

Parameters:

variable - variable to create for

domList - list of domains

arcList - list of arcs

DomainStructure

public DomainStructure(IntVar variable,
 IntDomain[] domains,
 Arc[] arcs)

DomainStructure

public DomainStructure(IntVar variable,
 IntDomain[] domains,
 Arc[] arcs,
 DomainStructure.Behavior behavior)

Method Details

processEvent

public void processEvent(IntVar variable,
 MutableNetwork network)

Description copied from interface: VarHandler

Informs the handler that one of its variable has changed and asks the handler to update the state of the network accordingly.

Specified by:

processEvent in interface VarHandler

Parameters:

variable - the variable that changed

network - the network

groundArc

private void groundArc(int arcID,
 boolean active,
 MutableNetwork network)

swap

private void swap(int i,
 int j)

ungroundArc

public void ungroundArc(int arcID)

listVariables

public List<IntVar> listVariables()

Specified by:

listVariables in interface VarHandler

Returns:

the list of variables handled by this handler

isGrounded

public boolean isGrounded(int arcID)

getPruningEvent

public int getPruningEvent(Var var)

Description copied from interface: VarHandler

Retrieves the consistency pruning event of a handler variable that causes the handler to be reevaluated. For instance, X- and W-variables will listen to BOUND events while S-variables typically consider ANY events.

Specified by:

getPruningEvent in interface VarHandler

Parameters:

var - a handler variable

Returns:

the pruning event which causes reevaluation of the handler