Package org.tweetyproject.logics.translators.adfconditional

Class ThreeValuedWorld

java.lang.Object

org.tweetyproject.commons.AbstractInterpretation<PlBeliefSet,PlFormula>

org.tweetyproject.logics.translators.adfconditional.ThreeValuedWorld

All Implemented Interfaces:

Interpretation<PlBeliefSet,PlFormula>

public class ThreeValuedWorld
extends AbstractInterpretation<PlBeliefSet,PlFormula>

This class models a three-valued interpretation for propositional logic Formulas are interpreted using completions Every atom is assigned one of the three truth values: TRUE, FALSE, UNDECIDED.

Author:

Jonas Schumacher

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	ThreeValuedWorld.TruthValue	The three truth values.

Constructor Summary

Constructors

Constructor	Description
ThreeValuedWorld()	Creates an empty 3-valued world
ThreeValuedWorld(ThreeValuedWorld other)	Creates a new world which is a copy of the given world

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
ThreeValuedWorld.TruthValue	get(Proposition p)	Returns the truth value of the given proposition.
PlSignature	getSignature()	Returns the signature of this world.
Collection<PossibleWorld>	getTwoValuedSet()	This method calculates a collection of 2-valued worlds based on this 3-valued world UNDECIDED atoms are replaced by FALSE or TRUE
int	hashCode()
boolean	satisfies(PlBeliefSet beliefBase)	Checks whether this interpretation satisfies the given knowledge base.
boolean	satisfies(PlFormula formula)	Checks whether this interpretation satisfies the given formula.
ThreeValuedWorld.TruthValue	satisfies3VL(PlFormula formula)	Determines the 3-valued truth value of the given formula.
void	set(Proposition p, ThreeValuedWorld.TruthValue val)	Sets the value of the given proposition.
String	toString()

Methods inherited from class org.tweetyproject.commons.AbstractInterpretation

satisfies

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ThreeValuedWorld

public ThreeValuedWorld()

Creates an empty 3-valued world

ThreeValuedWorld

public ThreeValuedWorld(ThreeValuedWorld other)

Creates a new world which is a copy of the given world

Parameters:

other - some other world

Method Details

set

public void set(Proposition p,
 ThreeValuedWorld.TruthValue val)

Sets the value of the given proposition.

Parameters:

p - some proposition.

val - some truth value.

get

public ThreeValuedWorld.TruthValue get(Proposition p)

Returns the truth value of the given proposition.

Parameters:

p - a proposition

Returns:

a truth value.

getSignature

public PlSignature getSignature()

Returns the signature of this world.

Returns:

the signature of this world.

getTwoValuedSet

public Collection<PossibleWorld> getTwoValuedSet()

This method calculates a collection of 2-valued worlds based on this 3-valued world UNDECIDED atoms are replaced by FALSE or TRUE

Returns:

Collection of 2-valued worlds

satisfies

public boolean satisfies(PlFormula formula)

Description copied from interface: Interpretation

Checks whether this interpretation satisfies the given formula.

Parameters:

formula - a formula .

Returns:

"true" if this interpretation satisfies the given formula.

satisfies3VL

public ThreeValuedWorld.TruthValue satisfies3VL(PlFormula formula)

Determines the 3-valued truth value of the given formula.

Parameters:

formula - : some propositional formula

Returns:

the 3-valued truth value of the formula.

satisfies

public boolean satisfies(PlBeliefSet beliefBase)
                  throws IllegalArgumentException

Description copied from interface: Interpretation

Checks whether this interpretation satisfies the given knowledge base.

Parameters:

beliefBase - a knowledge base.

Returns:

"true" if this interpretation satisfies the given knowledge base.

Throws:

IllegalArgumentException - IllegalArgumentException if the knowledgebase does not correspond to the expected language.

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object