com.google.ortools.constraintsolver

Class Constraint

java.lang.Object

com.google.ortools.constraintsolver.BaseObject

com.google.ortools.constraintsolver.PropagationBaseObject

com.google.ortools.constraintsolver.Constraint

Direct Known Subclasses:

CastConstraint, DisjunctiveConstraint, GlobalVehicleBreaksConstraint, Pack, TypeRegulationsConstraint

public class Constraint
extends PropagationBaseObject

A constraint is the main modeling object. It provides two methods:
- Post() is responsible for creating the demons and attaching them to
immediate demons().
- InitialPropagate() is called once just after Post and performs
the initial propagation. The subsequent propagations will be performed
by the demons Posted during the post() method.

Field Summary

Fields inherited from class com.google.ortools.constraintsolver.BaseObject

swigCMemOwn

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Constraint(long cPtr, boolean cMemoryOwn)

Method Summary

Modifier and Type	Method and Description
void	accept(ModelVisitor visitor) Accepts the given visitor.
void	delete()
protected void	finalize()
protected static long	getCPtr(Constraint obj)
void	initialPropagate() This method performs the initial propagation of the constraint.
boolean	isCastConstraint() Is the constraint created by a cast from expression to integer variable?
void	post() This method is called when the constraint is processed by the solver.
void	postAndPropagate() Calls Post and then Propagate to initialize the constraints.
protected static long	swigRelease(Constraint obj)
java.lang.String	toString()
IntVar	var() Creates a Boolean variable representing the status of the constraint (false = constraint is violated, true = constraint is satisfied).

Methods inherited from class com.google.ortools.constraintsolver.PropagationBaseObject

baseName, enqueueDelayedDemon, enqueueVar, freezeQueue, getCPtr, hasName, name, reset_action_on_fail, set_variable_to_clean_on_fail, setName, solver, swigRelease, unfreezeQueue

Methods inherited from class com.google.ortools.constraintsolver.BaseObject

getCPtr, swigRelease

Methods inherited from class java.lang.Object

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

Constructor Detail

Constraint

protected Constraint(long cPtr,
                     boolean cMemoryOwn)

Method Detail

getCPtr

protected static long getCPtr(Constraint obj)

swigRelease

protected static long swigRelease(Constraint obj)

finalize

protected void finalize()

Overrides:

finalize in class PropagationBaseObject

delete

public void delete()

Overrides:

delete in class PropagationBaseObject

post

public void post()

This method is called when the constraint is processed by the
solver. Its main usage is to attach demons to variables.

initialPropagate

public void initialPropagate()

This method performs the initial propagation of the
constraint. It is called just after the post.

toString

public java.lang.String toString()

Overrides:

toString in class PropagationBaseObject

postAndPropagate

public void postAndPropagate()

Calls Post and then Propagate to initialize the constraints. This
is usually done in the root node.

accept

public void accept(ModelVisitor visitor)

Accepts the given visitor.

isCastConstraint

public boolean isCastConstraint()

Is the constraint created by a cast from expression to integer variable?

var

public IntVar var()

Creates a Boolean variable representing the status of the constraint
(false = constraint is violated, true = constraint is satisfied). It
returns nullptr if the constraint does not support this API.