Module org.maxicp

Package org.maxicp.cp.engine.constraints.scheduling

Class Alternative

java.lang.Object

org.maxicp.cp.engine.core.AbstractCPConstraint

org.maxicp.cp.engine.constraints.scheduling.Alternative

All Implemented Interfaces:

CPConstraint, ConcreteConstraint<ConcreteCPModel>

public class Alternative
extends AbstractCPConstraint

Alternative Constraint with cardinality: Enforces that if the interval a is present, then c intervals from the array alt must be present and synchronized with a. If a is not present, then all the intervals of alt must be absent.

Author:

Charles Thomas

Constructor Summary

Constructors

Constructor	Description
Alternative(CPIntervalVar a, CPIntervalVar[] alts, CPIntVar c)	Creates an Alternative constraint with cardinality c.

Method Summary

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

Methods inherited from class org.maxicp.cp.engine.core.AbstractCPConstraint

getSolver, isActive, isScheduled, priority, registerDelta, setActive, setScheduled, updateDeltas

Methods inherited from class java.lang.Object

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

Constructor Details

Alternative

public Alternative(CPIntervalVar a,
 CPIntervalVar[] alts,
 CPIntVar c)

Creates an Alternative constraint with cardinality c.

Parameters:

a - the main interval variable

alts - the array of alternative interval variables

c - the cardinality variable specifying how many intervals in alts are present when a is present

Method Details

post

public void post()

Description copied from interface: CPConstraint

Initializes the constraint when it is posted to the solver.

Specified by:

post in interface CPConstraint

Overrides:

post in class AbstractCPConstraint

propagate

public void propagate()

Description copied from interface: CPConstraint

Propagates the constraint.

Specified by:

propagate in interface CPConstraint

Overrides:

propagate in class AbstractCPConstraint