Package org.tweetyproject.lp.asp.syntax

Class StrictNegation

java.lang.Object

org.tweetyproject.lp.asp.syntax.ASPElement

org.tweetyproject.lp.asp.syntax.ASPBodyElement

org.tweetyproject.lp.asp.syntax.ASPLiteral

org.tweetyproject.lp.asp.syntax.StrictNegation

All Implemented Interfaces:

Comparable<ASPLiteral>, Formula, Atom, ComplexLogicalFormula, Invertable, LogicStructure, SimpleLogicalFormula

public class StrictNegation
extends ASPLiteral

This class models the strict negation of an atom (as opposed to a default negation: DefaultNegation).

Author:

Tim Janus, Thomas Vengels, Anna Gessler

Nested Class Summary

Nested classes/interfaces inherited from interface org.tweetyproject.logics.commons.syntax.interfaces.Atom

Atom.AtomImpl, Atom.RETURN_SET_PREDICATE

Constructor Summary

Constructors

Constructor	Description
StrictNegation(String name)	Creates a new negation with the given name.
StrictNegation(Predicate p, List<Term<?>> terms)	Creates a new negation with the given predicate and terms.
StrictNegation(ASPAtom atom)	Creates a new negation with the given atom.
StrictNegation(StrictNegation other)	Copy-Constructor

Method Summary

Modifier and Type	Method	Description
void	addArgument(Term<?> arg)	Adds an argument to the atom's argument list
StrictNegation	clone()	Creates a deep copy of this formula
ASPLiteral	cloneWithAddedTerm(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 obj)
List<? extends Term<?>>	getArguments()
ASPAtom	getAtom()	Return The atom representing the literal.
Set<ASPAtom>	getAtoms()	Processes the set of all atoms which appear in this formula
SortedSet<ASPLiteral>	getLiterals()	Returns all literals in this element in form of a SortedSet.
String	getName()
Predicate	getPredicate()
Set<Predicate>	getPredicates()	Processes the set of all predicates which appear in this formula
FolSignature	getSignature()	Returns the signature of the language of this formula.
Set<Term<?>>	getTerms()
<C extends Term<?>> Set<C>	getTerms(Class<C> cls)	Processes the set containing all terms of type C.
int	hashCode()
boolean	isComplete()
Atom.RETURN_SET_PREDICATE	setPredicate(Predicate predicate)	Changes the predicate of the atom.
StrictNegation	substitute(Term<?> v, Term<?> t)	Substitutes all occurrences of term "v" in this formula by term "t" and returns the new formula.
String	toString()

Methods inherited from class org.tweetyproject.lp.asp.syntax.ASPLiteral

isLiteral

Methods inherited from class org.tweetyproject.lp.asp.syntax.ASPElement

containsTermsOfType, exchange, getPredicateCls, isGround, isWellFormed, printToClingo, printToDLV, substitute

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.tweetyproject.logics.commons.syntax.interfaces.SimpleLogicalFormula

getPredicateCls

Constructor Details

StrictNegation

public StrictNegation(ASPAtom atom)

Creates a new negation with the given atom.

Parameters:

atom - an ASP atom

StrictNegation

public StrictNegation(Predicate p,
 List<Term<?>> terms)

Creates a new negation with the given predicate and terms.

Parameters:

p - predicate of the negated atom

terms - terms of the negated atom

StrictNegation

public StrictNegation(StrictNegation other)

Copy-Constructor

Parameters:

other - another StrictNegation

StrictNegation

public StrictNegation(String name)

Creates a new negation with the given name.

Parameters:

name - of the negated atom's predicate

Method Details

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<Predicate> getPredicates()

Description copied from interface: SimpleLogicalFormula

Processes the set of all predicates which appear in this formula

Specified by:

getPredicates in interface SimpleLogicalFormula

Specified by:

getPredicates in class ASPElement

Returns:

all predicates that appear in this formula

getAtoms

public Set<ASPAtom> getAtoms()

Description copied from interface: SimpleLogicalFormula

Processes the set of all atoms which appear in this formula

Specified by:

getAtoms in interface SimpleLogicalFormula

Specified by:

getAtoms in class ASPElement

Returns:

The set of all atoms

getSignature

public FolSignature getSignature()

Description copied from interface: Formula

Returns the signature of the language of this formula.

Specified by:

getSignature in interface Formula

Specified by:

getSignature in class ASPElement

Returns:

the signature of the language of this formula.

clone

public StrictNegation clone()

Description copied from interface: SimpleLogicalFormula

Creates a deep copy of this formula

Specified by:

clone in interface ComplexLogicalFormula

Specified by:

clone in interface SimpleLogicalFormula

Specified by:

clone in class ASPElement

Returns:

the cloned formula

getTerms

public Set<Term<?>> getTerms()

Returns:

a set containing all terms of this logical structure

getTerms

public <C extends Term<?>> Set<C> getTerms(Class<C> cls)

Description copied from interface: LogicStructure

Processes the set containing all terms of type C. This method uses the equals method of the given Class and therefore does not add terms which are sub classes of type C to the set.

Type Parameters:

C - the type of terms

Parameters:

cls - The Class structure containing type information about the searched term

Returns:

A set containing all terms of type C of this logical structure

getName

public String getName()

Returns:

the name of the predicate

getPredicate

public Predicate getPredicate()

Returns:

the predicate of the atom

setPredicate

public Atom.RETURN_SET_PREDICATE setPredicate(Predicate predicate)

Description copied from interface: Atom

Changes the predicate of the atom. Given an old Predicate po and a new predicate pn with their list of arguments types at(po) and at(pn) and the arguments of this Atom: arg(this) this method distinguishes between three cases: 1. The predicate only differ in the names, returning RSP_SUCCESS 2. The old predicates argument types is a sub-list of the new argument types then the method returns RSP_INCOMPLETE and the atoms isComplete() method returns false 3. The new predicates argument types is a sub-list of the old argument types then the method returns RSP_TRUNCATED and the arguments of this atom are truncated too and isComplete() returns true. 4. The old and new predicates' argument types differ then the list of arguments of the atom get cleared and isComplete() returns false.

Parameters:

predicate - some predicate

Returns:

Depends on the cases described above: 1. RSP_SUCCESS 2. RSP_INCOMPLETE 3. RSP_TRUNCATED 4. RSP_CLEARED

addArgument

public void addArgument(Term<?> arg)
                 throws LanguageException

Description copied from interface: Atom

Adds an argument to the atom's argument list

Parameters:

arg - The next argument

Throws:

LanguageException - If the language does not support arguments for their constructs.

getArguments

public List<? extends Term<?>> getArguments()

Returns:

A list containing all the arguments of this specific atom

isComplete

public boolean isComplete()

Returns:

true if the size of the argument list is equal to the arity of the predicate

compareTo

public int compareTo(ASPLiteral o)

cloneWithAddedTerm

public ASPLiteral cloneWithAddedTerm(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()

Description copied from class: ASPLiteral

Return The atom representing the literal.

Specified by:

getAtom in class ASPLiteral

Returns:

The atom representing the literal.

complement

public ASPLiteral complement()

Specified by:

complement in interface Invertable

Specified by:

complement in class ASPLiteral

Returns:

the complement of this formula.

substitute

public StrictNegation substitute(Term<?> v,
 Term<?> t)
                          throws IllegalArgumentException

Description copied from interface: ComplexLogicalFormula

Substitutes all occurrences of term "v" in this formula by term "t" and returns the new formula.

Specified by:

substitute in interface ComplexLogicalFormula

Specified by:

substitute in class ASPBodyElement

Parameters:

v - the term to be substituted.

t - the term to substitute.

Returns:

a formula where every occurrence of "v" is replaced by "t".

Throws:

IllegalArgumentException - if "v" and "t" are of different sorts

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface SimpleLogicalFormula

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface SimpleLogicalFormula

Overrides:

equals in class Object