net.sf.cpsolver.ifs.extension
Class Assignment

java.lang.Object
  net.sf.cpsolver.ifs.extension.Assignment

public class Assignment
extends Object

This class describing an assignment of a value to a variable together with a counter (used by CBS). Counter also supports ageing: the counter is multiplied by aging factor for each iteration.

Version:

IFS 1.1 (Iterative Forward Search)
Copyright (C) 2006 Tomáš Müller
muller@unitime.org
Lazenska 391, 76314 Zlin, Czech Republic

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Nested Class Summary

static class

Assignment.AssignmentComparator Assignment comparator

Constructor Summary

Assignment(long iteration, Value value, double ageing)
Constructor

Method Summary

static int	combine(int a, int b) Combine two integers (for hash code)
int	compareTo(long iteration, Assignment a) Compare two assignments (their counters)
boolean	equals(Object o)
static Comparator	getComparator(long iteration) Returns comparator of assignments
Constraint	getConstraint() Returns constraint
double	getCounter(long iteration) Get counter
Value	getValue() Returns value
int	hashCode()
void	incCounter(long iteration) Increments counter
void	revise(long iteration) Revise counter.
void	setConstraint(Constraint constraint) Sets constraint
void	setCounter(double cnt) Set counter
String	toString() String representation
String	toString(long iteration, boolean assignment) String representation (e.g., 10x A := a)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Assignment

public Assignment(long iteration,
                  Value value,
                  double ageing)

Constructor

Parameters:

iteration - current iteration

value - value

ageing - ageing factor

Method Detail

getValue

public Value getValue()

Returns value

incCounter

public void incCounter(long iteration)

Increments counter

Parameters:

iteration - current iteration

setCounter

public void setCounter(double cnt)

Set counter

Parameters:

cnt - new value

getCounter

public double getCounter(long iteration)

Get counter

Parameters:

iteration - current iteration

getConstraint

public Constraint getConstraint()

Returns constraint

setConstraint

public void setConstraint(Constraint constraint)

Sets constraint

revise

public void revise(long iteration)

Revise counter. If ageing is used, counter is adopted to the current iteration: it is multiplited by ageing factor powered by the number of iterations since last revision.

combine

public static int combine(int a,
                          int b)

Combine two integers (for hash code)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

getComparator

public static Comparator getComparator(long iteration)

Returns comparator of assignments

toString

public String toString()

String representation

Overrides:

toString in class Object

toString

public String toString(long iteration,
                       boolean assignment)

String representation (e.g., 10x A := a)

compareTo

public int compareTo(long iteration,
                     Assignment a)

Compare two assignments (their counters)