minicp.engine.constraints

Class TableCT

java.lang.Object

minicp.engine.core.AbstractConstraint

minicp.engine.constraints.TableCT

All Implemented Interfaces:

Constraint

public class TableCT
extends AbstractConstraint

Implementation of Compact Table algorithm described in

Compact-Table: Efficiently Filtering Table Constraints with Reversible Sparse Bit-Sets Jordan Demeulenaere, Renaud Hartert, Christophe Lecoutre, Guillaume Perez, Laurent Perron, Jean-Charles Régin, Pierre Schaus

See The article.

Constructor Summary

Constructors

Constructor and Description
TableCT(IntVar[] x, int[][] table) Table 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

TableCT

public TableCT(IntVar[] x,
               int[][] table)

Table constraint.

The table constraint ensures that x is a row from the given table. More exactly, there exist some row i such that x[0]==table[i][0], x[1]==table[i][1], etc.

This constraint is sometimes called in extension constraint as the user enumerates the set of solutions that can be taken by the variables.

Parameters:

x - the non empty set of variables to constraint

table - the possible set of solutions for x. The second dimension must be of the same size as the array x.

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