net.sf.tweety.arg.lp.reasoner

Class LiteralReasoner

java.lang.Object

net.sf.tweety.arg.lp.reasoner.ArgumentationReasoner

net.sf.tweety.arg.lp.reasoner.LiteralReasoner

All Implemented Interfaces:

net.sf.tweety.commons.QualitativeReasoner<ArgumentationKnowledgeBase,Argument>, net.sf.tweety.commons.Reasoner<Boolean,ArgumentationKnowledgeBase,Argument>

public class LiteralReasoner
extends ArgumentationReasoner

This class extends the default argumentation reasoner to the reasoning about literals in the set of arguments constructible from an extended logic program p. A literal l is considered true, also called justified, in p, iff there is a justified argument with conclusion l.

Author:

Sebastian Homann

Field Summary

Fields inherited from class net.sf.tweety.arg.lp.reasoner.ArgumentationReasoner

attackStrategy, defenceStrategy

Constructor Summary

Constructors

Constructor and Description
LiteralReasoner(AttackStrategy attack, AttackStrategy defence) Creates a new reasoner for reasoning about literals in an extended logic program given by the beliefBase.

Method Summary

Modifier and Type	Method and Description
boolean	isJustified(ArgumentationKnowledgeBase kb, net.sf.tweety.lp.asp.syntax.ASPLiteral arg) A literal is called x/y-justified, if a x/y-justified argument with conclusion arg can be constructed from p.
boolean	isOverruled(ArgumentationKnowledgeBase kb, net.sf.tweety.lp.asp.syntax.ASPLiteral arg) A literal is called x/y-overruled, iff it is not x/y-justified.
Boolean	query(ArgumentationKnowledgeBase kb, net.sf.tweety.lp.asp.syntax.ASPLiteral query)

Methods inherited from class net.sf.tweety.arg.lp.reasoner.ArgumentationReasoner

getDefensibleArguments, getJustifiedArguments, getOverruledArguments, isDefensible, isOverruled, query

Methods inherited from class java.lang.Object

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

Constructor Detail

LiteralReasoner

public LiteralReasoner(AttackStrategy attack,
                       AttackStrategy defence)

Creates a new reasoner for reasoning about literals in an extended logic program given by the beliefBase. The argumentation framework is parameterised by two notions of attack. See the original ArgumentationReasoner for details.

Parameters:

beliefBase -

attack -

defence -

Method Detail

query

public Boolean query(ArgumentationKnowledgeBase kb,
                     net.sf.tweety.lp.asp.syntax.ASPLiteral query)

isOverruled

public boolean isOverruled(ArgumentationKnowledgeBase kb,
                           net.sf.tweety.lp.asp.syntax.ASPLiteral arg)

A literal is called x/y-overruled, iff it is not x/y-justified.

Parameters:

arg - a literal

Returns:

true iff arg is not x/y-overruled

isJustified

public boolean isJustified(ArgumentationKnowledgeBase kb,
                           net.sf.tweety.lp.asp.syntax.ASPLiteral arg)

A literal is called x/y-justified, if a x/y-justified argument with conclusion arg can be constructed from p.

Parameters:

arg - a literal

Returns:

true iff a x/y-justified argument with conclusion arg can be constructed from p