Package net.sf.tweety.lp.asp.syntax

Class ASPAtom

java.lang.Object

net.sf.tweety.lp.asp.syntax.ASPElement

net.sf.tweety.lp.asp.syntax.ASPBodyElement

net.sf.tweety.lp.asp.syntax.ASPLiteral

net.sf.tweety.lp.asp.syntax.ASPAtom

All Implemented Interfaces:

Comparable<ASPLiteral>, net.sf.tweety.commons.Formula, net.sf.tweety.logics.commons.syntax.interfaces.Atom, net.sf.tweety.logics.commons.syntax.interfaces.ComplexLogicalFormula, net.sf.tweety.logics.commons.syntax.interfaces.Invertable, net.sf.tweety.logics.commons.syntax.interfaces.LogicStructure, net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

public class ASPAtom
extends ASPLiteral

This class models an atom, which is a basic structure for building literals and rules for logic programs.

Author:

Tim Janus, Thomas Vengels, Matthias Thimm, Anna Gessler

Nested Class Summary

Nested classes/interfaces inherited from interface net.sf.tweety.logics.commons.syntax.interfaces.Atom

net.sf.tweety.logics.commons.syntax.interfaces.Atom.AtomImpl, net.sf.tweety.logics.commons.syntax.interfaces.Atom.RETURN_SET_PREDICATE

Field Summary

Fields

Modifier and Type	Field	Description
protected List<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>>	arguments	A list of arguments of the atom
protected net.sf.tweety.logics.commons.syntax.Predicate	predicate	The predicate identifying the atom

Constructor Summary

Constructors

Constructor	Description
ASPAtom()	Empty constructor.
ASPAtom(String name)	Creates a new atom with the given predicate name and no terms.
ASPAtom(String symbol, net.sf.tweety.logics.commons.syntax.interfaces.Term<?>... terms)	Creates an atom with the given predicate as name and the given terms as argument
ASPAtom(net.sf.tweety.logics.commons.syntax.Predicate p)	Creates a new ASPAtom with the given predicate.
ASPAtom(net.sf.tweety.logics.commons.syntax.Predicate p, List<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> terms)	Creates a new atom with the given predicate and terms.
ASPAtom(net.sf.tweety.logics.fol.syntax.FolAtom other)	Copy-Constructor: Generates a deep copy of the given FOL atom.
ASPAtom(ASPAtom other)	Copy-Constructor: Generates a deep copy of the given ASP atom.

Method Summary

Modifier and Type	Method	Description
void	addArgument(net.sf.tweety.logics.commons.syntax.interfaces.Term<?> arg)
ASPAtom	clone()
ASPAtom	cloneWithAddedTerm(net.sf.tweety.logics.commons.syntax.interfaces.Term<?> term)	Creates a copy of the literal and adds the given term as argument to the end of the argument list.
int	compareTo(ASPLiteral o)
ASPLiteral	complement()
boolean	equals(Object o)
List<? extends net.sf.tweety.logics.commons.syntax.interfaces.Term<?>>	getArguments()
ASPAtom	getAtom()
Set<ASPAtom>	getAtoms()
SortedSet<ASPLiteral>	getLiterals()	Returns all literals in this element in form of a SortedSet.
String	getName()
net.sf.tweety.logics.commons.syntax.Predicate	getPredicate()
Set<net.sf.tweety.logics.commons.syntax.Predicate>	getPredicates()
net.sf.tweety.logics.fol.syntax.FolSignature	getSignature()
net.sf.tweety.logics.commons.syntax.interfaces.Term<?>	getTerm(int i)
Set<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>>	getTerms()
<C extends net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> Set<C>	getTerms(Class<C> cls)
int	hashCode()
boolean	isComplete()
net.sf.tweety.logics.commons.syntax.interfaces.Atom.RETURN_SET_PREDICATE	setPredicate(net.sf.tweety.logics.commons.syntax.Predicate newer)
ASPAtom	substitute(net.sf.tweety.logics.commons.syntax.interfaces.Term<?> v, net.sf.tweety.logics.commons.syntax.interfaces.Term<?> t)
String	toString()

Methods inherited from class net.sf.tweety.lp.asp.syntax.ASPLiteral

isLiteral

Methods inherited from class net.sf.tweety.lp.asp.syntax.ASPElement

containsTermsOfType, exchange, getPredicateCls, isGround, isWellFormed, substitute

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

getPredicateCls

Field Detail

predicate

protected net.sf.tweety.logics.commons.syntax.Predicate predicate

The predicate identifying the atom

arguments

protected List<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> arguments

A list of arguments of the atom

Constructor Detail

ASPAtom

public ASPAtom()

Empty constructor.

ASPAtom

public ASPAtom(net.sf.tweety.logics.commons.syntax.Predicate p,
               List<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> terms)

Creates a new atom with the given predicate and terms.

Parameters:

p - a predicate

terms - arguments of the atom

ASPAtom

public ASPAtom(String name)

Creates a new atom with the given predicate name and no terms.

Parameters:

name - a name

ASPAtom

public ASPAtom(net.sf.tweety.logics.fol.syntax.FolAtom other)

Copy-Constructor: Generates a deep copy of the given FOL atom.

Parameters:

other - The FOL atom acting as source for the deep copy

ASPAtom

public ASPAtom(ASPAtom other)

Copy-Constructor: Generates a deep copy of the given ASP atom.

Parameters:

other - The atom acting as source for the deep copy

ASPAtom

public ASPAtom(String symbol,
               net.sf.tweety.logics.commons.syntax.interfaces.Term<?>... terms)

Creates an atom with the given predicate as name and the given terms as argument

Parameters:

symbol - The name of the atom

terms - A list of Term<?> defining the arguments of the term

ASPAtom

public ASPAtom(net.sf.tweety.logics.commons.syntax.Predicate p)

Creates a new ASPAtom with the given predicate.

Parameters:

p - a predicate

Method Detail

getName

public String getName()

toString

public String toString()

Overrides:

toString in class Object

getLiterals

public SortedSet<ASPLiteral> getLiterals()

Description copied from class: ASPBodyElement

Returns all literals in this element in form of a SortedSet. Literals are atoms or strict negations of atoms.

Specified by:

getLiterals in class ASPBodyElement

Returns:

all the literals used in the rule element

getPredicates

public Set<net.sf.tweety.logics.commons.syntax.Predicate> getPredicates()

Specified by:

getPredicates in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Specified by:

getPredicates in class ASPElement

getAtoms

public Set<ASPAtom> getAtoms()

Specified by:

getAtoms in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Specified by:

getAtoms in class ASPElement

getSignature

public net.sf.tweety.logics.fol.syntax.FolSignature getSignature()

Specified by:

getSignature in interface net.sf.tweety.commons.Formula

Specified by:

getSignature in class ASPElement

clone

public ASPAtom clone()

Specified by:

clone in interface net.sf.tweety.logics.commons.syntax.interfaces.ComplexLogicalFormula

Specified by:

clone in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Specified by:

clone in class ASPElement

getTerms

public Set<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> getTerms()

getTerms

public <C extends net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> Set<C> getTerms(Class<C> cls)

getPredicate

public net.sf.tweety.logics.commons.syntax.Predicate getPredicate()

setPredicate

public net.sf.tweety.logics.commons.syntax.interfaces.Atom.RETURN_SET_PREDICATE setPredicate(net.sf.tweety.logics.commons.syntax.Predicate newer)

addArgument

public void addArgument(net.sf.tweety.logics.commons.syntax.interfaces.Term<?> arg)
                 throws net.sf.tweety.logics.commons.error.LanguageException

Throws:

net.sf.tweety.logics.commons.error.LanguageException

getArguments

public List<? extends net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> getArguments()

isComplete

public boolean isComplete()

compareTo

public int compareTo(ASPLiteral o)

cloneWithAddedTerm

public ASPAtom cloneWithAddedTerm(net.sf.tweety.logics.commons.syntax.interfaces.Term<?> term)

Description copied from class: ASPLiteral

Creates a copy of the literal and adds the given term as argument to the end of the argument list.

Specified by:

cloneWithAddedTerm in class ASPLiteral

Parameters:

term - the new argument.

Returns:

A copy of the literal containing the given term as new argument.

getAtom

public ASPAtom getAtom()

Specified by:

getAtom in class ASPLiteral

Returns:

The atom representing the literal.

complement

public ASPLiteral complement()

Specified by:

complement in interface net.sf.tweety.logics.commons.syntax.interfaces.Invertable

Specified by:

complement in class ASPLiteral

substitute

public ASPAtom substitute(net.sf.tweety.logics.commons.syntax.interfaces.Term<?> v,
                          net.sf.tweety.logics.commons.syntax.interfaces.Term<?> t)
                   throws IllegalArgumentException

Specified by:

substitute in interface net.sf.tweety.logics.commons.syntax.interfaces.ComplexLogicalFormula

Specified by:

substitute in class ASPBodyElement

Throws:

IllegalArgumentException

getTerm

public net.sf.tweety.logics.commons.syntax.interfaces.Term<?> getTerm(int i)

equals

public boolean equals(Object o)

Specified by:

equals in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Overrides:

hashCode in class Object