Package net.sf.tweety.lp.asp.semantics

Class AnswerSet

java.lang.Object

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

net.sf.tweety.commons.InterpretationSet<ASPLiteral,Program,ASPRule>

net.sf.tweety.lp.asp.semantics.AnswerSet

All Implemented Interfaces:

java.lang.Iterable<ASPLiteral>, java.util.Collection<ASPLiteral>, Interpretation<Program,ASPRule>

public class AnswerSet
extends InterpretationSet<ASPLiteral,Program,ASPRule>

An answer set is a belief set which only contains literals and represents the deductive belief set of an extended logic program under the answer set semantic.

Author:

Thomas Vengels, Tim Janus, Anna Gessler

Field Summary

Fields

Modifier and Type	Field	Description
int	level
int	weight

Constructor Summary

Constructors

Constructor	Description
AnswerSet()	Creates a new empty AnswerSet.
AnswerSet(java.util.Collection<ASPLiteral> lits, int level, int weight)	Creates a new empty AnswerSet with the given level and weight.
AnswerSet(AnswerSet other)	Copy-Constructor

Method Summary

Modifier and Type	Method	Description
java.lang.Object	clone()
java.util.Set<ASPLiteral>	getLiteralsWithName(java.lang.String name)	Returns all literals of a given name in the AnswerSet.
boolean	satisfies(ASPRule formula)	Checks whether this interpretation satisfies the given formula.
boolean	satisfies(Program beliefBase)	Checks whether this interpretation satisfies the given knowledge base.
java.lang.String	toString()

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

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

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

satisfies

Methods inherited from class java.lang.Object

finalize, 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

Field Detail

level

public final int level

weight

public final int weight

Constructor Detail

AnswerSet

public AnswerSet()

Creates a new empty AnswerSet.

AnswerSet

public AnswerSet(java.util.Collection<ASPLiteral> lits,
                 int level,
                 int weight)

Creates a new empty AnswerSet with the given level and weight.

Parameters:

lits - the literals

level - the level

weight - the weight

AnswerSet

public AnswerSet(AnswerSet other)

Copy-Constructor

Parameters:

other - another answer set

Method Detail

getLiteralsWithName

public java.util.Set<ASPLiteral> getLiteralsWithName(java.lang.String name)

Returns all literals of a given name in the AnswerSet.

Parameters:

name - the name of the literal

Returns:

set of literals

toString

public java.lang.String toString()

Overrides:

toString in class InterpretationSet<ASPLiteral,Program,ASPRule>

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object

satisfies

public boolean satisfies(Program beliefBase)
                  throws java.lang.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:

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

satisfies

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

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.

Throws:

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