Package net.sf.tweety.logics.qbf.semantics

Class QbPossibleWorld

java.lang.Object

net.sf.tweety.commons.AbstractInterpretation<B,S>

net.sf.tweety.commons.InterpretationSet<Proposition,PlBeliefSet,PlFormula>

net.sf.tweety.logics.qbf.semantics.QbPossibleWorld

All Implemented Interfaces:

java.lang.Comparable<PossibleWorld>, java.lang.Iterable<Proposition>, java.util.Collection<Proposition>, Interpretation<PlBeliefSet,PlFormula>

public class QbPossibleWorld
extends InterpretationSet<Proposition,PlBeliefSet,PlFormula>
implements java.lang.Comparable<PossibleWorld>

This class represents a possible world of quantified boolean logic, i.e. some set of propositions.

Author:

Anna Gessler, Matthias Thimm

Constructor Summary

Constructors

Constructor	Description
QbPossibleWorld()	Creates a new empty possible world.
QbPossibleWorld(java.util.Collection<? extends Proposition> propositions)	Creates a new possible world with the given set of propositions.

Method Summary

Modifier and Type	Method	Description
int	compareTo(PossibleWorld o)
static java.util.Set<QbPossibleWorld>	getAllPossibleWorlds(java.util.Collection<Proposition> signature)	Returns the set of all possible worlds for the given propositional signature.
static java.util.Set<QbPossibleWorld>	getAllPossibleWorlds(PlSignature signature)	Returns the set of all possible worlds for the given propositional signature.
boolean	satisfies(java.util.Collection<PlFormula> formulas)	Checks whether this interpretation satisfies the given formula.
boolean	satisfies(PlBeliefSet beliefBase)	Checks whether this interpretation satisfies the given formula.
boolean	satisfies(PlFormula formula)	Checks whether this interpretation satisfies the given formula.
java.util.Set<PlFormula>	substitute(PlFormula f, Proposition v)	Substitutes all occurrences of the proposition v with the possible truth values and returns a set of the possible substitutions.

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

add, add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, spliterator, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

QbPossibleWorld

public QbPossibleWorld()

Creates a new empty possible world.

QbPossibleWorld

public QbPossibleWorld(java.util.Collection<? extends Proposition> propositions)

Creates a new possible world with the given set of propositions.

Parameters:

propositions - the propositions that are true in this possible world

Method Detail

satisfies

public boolean satisfies(PlFormula formula)
                  throws java.lang.IllegalArgumentException

Checks whether this interpretation satisfies the given formula.

Specified by:

satisfies in interface Interpretation<PlBeliefSet,PlFormula>

Parameters:

formula - a formula .

Returns:

"true" if this interpretation satisfies the given formula.

Throws:

java.lang.IllegalArgumentException - if the formula does not correspond to the expected language.

satisfies

public boolean satisfies(java.util.Collection<PlFormula> formulas)
                  throws java.lang.IllegalArgumentException

Checks whether this interpretation satisfies the given formula.

Specified by:

satisfies in interface Interpretation<PlBeliefSet,PlFormula>

Overrides:

satisfies in class AbstractInterpretation<PlBeliefSet,PlFormula>

Parameters:

formulas - a collection of formulas.

Returns:

"true" if this interpretation satisfies all given formulas.

Throws:

java.lang.IllegalArgumentException - if at least one formula does not correspond to the expected language.

satisfies

public boolean satisfies(PlBeliefSet beliefBase)
                  throws java.lang.IllegalArgumentException

Checks whether this interpretation satisfies the given formula.

Specified by:

satisfies in interface Interpretation<PlBeliefSet,PlFormula>

Parameters:

beliefBase - a knowledge base.

Returns:

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

Throws:

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

getAllPossibleWorlds

public static java.util.Set<QbPossibleWorld> getAllPossibleWorlds(java.util.Collection<Proposition> signature)

Returns the set of all possible worlds for the given propositional signature.

Parameters:

signature - a propositional signature.

Returns:

the set of all possible worlds for the given propositional signature.

getAllPossibleWorlds

public static java.util.Set<QbPossibleWorld> getAllPossibleWorlds(PlSignature signature)

Returns the set of all possible worlds for the given propositional signature.

Parameters:

signature - a propositional signature.

Returns:

the set of all possible worlds for the given propositional signature.

substitute

public java.util.Set<PlFormula> substitute(PlFormula f,
                                           Proposition v)

Substitutes all occurrences of the proposition v with the possible truth values and returns a set of the possible substitutions.

Parameters:

f - a formula

v - a proposition

Returns:

all possible substituted formulas

compareTo

public int compareTo(PossibleWorld o)

Specified by:

compareTo in interface java.lang.Comparable<PossibleWorld>