minicp.engine.constraints

Class Sum

java.lang.Object

minicp.engine.core.AbstractConstraint

minicp.engine.constraints.Sum

All Implemented Interfaces:

Constraint

public class Sum
extends AbstractConstraint

Sum Constraint

Constructor Summary

Constructors

Constructor and Description
Sum(IntVar[] x) Creates a sum constraint.
Sum(IntVar[] x, int y) Creates a sum constraint.
Sum(IntVar[] x, IntVar y) Creates a sum constraint.

Method Summary

Modifier and Type	Method and Description
void	post() Initializes the constraint when it is posted to the solver.
void	propagate() Propagates the constraint.

Methods inherited from class minicp.engine.core.AbstractConstraint

getSolver, isActive, isScheduled, setActive, setScheduled

Methods inherited from class java.lang.Object

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

Constructor Detail

Sum

public Sum(IntVar[] x,
           IntVar y)

Creates a sum constraint.

This constraint holds iff x[0]+x[1]+...+x[x.length-1] == y.

Parameters:

x - the non empty left hand side of the sum

y - the right hand side of the sum

Sum

public Sum(IntVar[] x,
           int y)

Creates a sum constraint.

This constraint holds iff x[0]+x[1]+...+x[x.length-1] == y.

Parameters:

x - the non empty left hand side of the sum

y - the right hand side of the sum

Sum

public Sum(IntVar[] x)

Creates a sum constraint.

This constraint holds iff x[0]+x[1]+...+x[x.length-1] == 0.

Parameters:

x - the non empty set of variables that should sum to zero

Method Detail

post

public void post()

Description copied from interface: Constraint

Initializes the constraint when it is posted to the solver.

Specified by:

post in interface Constraint

Overrides:

post in class AbstractConstraint

propagate

public void propagate()

Description copied from interface: Constraint

Propagates the constraint.

Specified by:

propagate in interface Constraint

Overrides:

propagate in class AbstractConstraint