org.sat4j.minisat.orders
Class PhaseInLastLearnedClauseSelectionStrategy

java.lang.Object
  extended by org.sat4j.minisat.orders.PhaseInLastLearnedClauseSelectionStrategy
All Implemented Interfaces:
Serializable, IPhaseSelectionStrategy

public final class PhaseInLastLearnedClauseSelectionStrategy
extends Object

Keeps record of the phase of a variable in the lastest recorded clause.

Author:
leberre
See Also:
Serialized Form

Field Summary
protected  int[] phase
           
 
Constructor Summary
PhaseInLastLearnedClauseSelectionStrategy()
           
 
Method Summary
 void assignLiteral(int p)
          indicate that a literal has been satisfied.
 void init(int nlength)
          that method has the responsibility to initialize all arrays in the heuristics.
 void init(int var, int p)
          initialize the phase of a given variable to the given value.
 int select(int var)
          selects the phase of the variable according to a phase selection strategy.
 String toString()
           
 void updateVar(int p)
          To be called when the activity of a literal changed.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

phase

protected int[] phase
Constructor Detail

PhaseInLastLearnedClauseSelectionStrategy

public PhaseInLastLearnedClauseSelectionStrategy()
Method Detail

updateVar

public void updateVar(int p)
Description copied from interface: IPhaseSelectionStrategy
To be called when the activity of a literal changed.

Parameters:
p - a literal. The associated variable will be updated.

toString

public String toString()
Overrides:
toString in class Object

assignLiteral

public void assignLiteral(int p)
Description copied from interface: IPhaseSelectionStrategy
indicate that a literal has been satisfied.


init

public void init(int nlength)
Description copied from interface: IPhaseSelectionStrategy
that method has the responsibility to initialize all arrays in the heuristics.

Specified by:
init in interface IPhaseSelectionStrategy
Parameters:
nlength - the number of variables managed by the heuristics.

init

public void init(int var,
                 int p)
Description copied from interface: IPhaseSelectionStrategy
initialize the phase of a given variable to the given value. That method is suppose to be called AFTER init(int).

Specified by:
init in interface IPhaseSelectionStrategy
Parameters:
var - a variable
p - it's initial phase

select

public int select(int var)
Description copied from interface: IPhaseSelectionStrategy
selects the phase of the variable according to a phase selection strategy.

Specified by:
select in interface IPhaseSelectionStrategy
Parameters:
var - a variable chosen by the heuristics
Returns:
either var or not var, depending of the selection strategy.


Copyright © 2010 Centre de Recherche en Informatique de Lens (CRIL). All Rights Reserved.