net.sf.tweety.logics.pl.util

Class RandomSatSampler

java.lang.Object

net.sf.tweety.commons.BeliefSetSampler<PropositionalFormula,PlBeliefSet>

net.sf.tweety.logics.pl.util.RandomSatSampler

All Implemented Interfaces:

Iterator<PlBeliefSet>, net.sf.tweety.commons.BeliefSetIterator<PropositionalFormula,PlBeliefSet>

public class RandomSatSampler
extends net.sf.tweety.commons.BeliefSetSampler<PropositionalFormula,PlBeliefSet>

A sampler for uniform random k-SAT instances.

Author:

Matthias Thimm

Field Summary

Fields inherited from class net.sf.tweety.commons.BeliefSetSampler

DEFAULT_MAXIMUM_BELIEFBASE_LENGTH, DEFAULT_MINIMUM_BELIEFBASE_LENGTH

Constructor Summary

Constructors

Constructor and Description
RandomSatSampler(net.sf.tweety.commons.Signature signature, int k) Constructs a new sampler
RandomSatSampler(net.sf.tweety.commons.Signature signature, int k, int minLength, int maxLength) Constructs a new sampler

Method Summary

Modifier and Type	Method and Description
PlBeliefSet	next()
Disjunction	randomClause() Generates a random clause with k literals.

Methods inherited from class net.sf.tweety.commons.BeliefSetSampler

getMaxLength, getMinLength, getSignature, hasNext

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

RandomSatSampler

public RandomSatSampler(net.sf.tweety.commons.Signature signature,
                        int k)

Constructs a new sampler

Parameters:

signature - some signature

k - the length of each clause

RandomSatSampler

public RandomSatSampler(net.sf.tweety.commons.Signature signature,
                        int k,
                        int minLength,
                        int maxLength)

Constructs a new sampler

Parameters:

signature - some signature

k - the length of each clause

minLength - the minimum length of knowledge bases

maxLength - the maximum length of knowledge bases

Method Detail

next

public PlBeliefSet next()

Specified by:

next in interface Iterator<PlBeliefSet>

Specified by:

next in interface net.sf.tweety.commons.BeliefSetIterator<PropositionalFormula,PlBeliefSet>

Overrides:

next in class net.sf.tweety.commons.BeliefSetSampler<PropositionalFormula,PlBeliefSet>

randomClause

public Disjunction randomClause()

Generates a random clause with k literals.

Returns:

a disjunction of literals.