net.sf.tweety.lp.asp.syntax

Class DLPNot

java.lang.Object

net.sf.tweety.logics.commons.syntax.ComplexLogicalFormulaAdapter

net.sf.tweety.lp.asp.syntax.DLPElementAdapter

net.sf.tweety.lp.asp.syntax.DLPNot

All Implemented Interfaces:

net.sf.tweety.commons.Formula, net.sf.tweety.logics.commons.syntax.interfaces.ComplexLogicalFormula, net.sf.tweety.logics.commons.syntax.interfaces.LogicStructure, net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula, DLPElement

public class DLPNot
extends DLPElementAdapter
implements DLPElement

this class models a default negated literal. in answer set programming, the body of a rule is usually composed of a set of positive and negative literals, where this valuation refers to default negation or negation as failure. when implementing a rule, there are two opportunities: - implement the rule with two distinct lists, representing the sets of positive and negative literals - implement the rule with one set containing super literals, where a super literal can be positive or strictly negated, with or without default negation. the library takes the second approach, which allows more flexibility, but comes at the cost that malformed constructs like "not not a" are not intercepted by the library.

Author:

Tim Janus, Thomas Vengels

Constructor Summary

Constructors

Constructor and Description
DLPNot(DLPLiteral inner)
DLPNot(DLPNot other)

Method Summary

Modifier and Type	Method and Description
DLPNot	clone()
boolean	equals(Object obj)
Set<DLPAtom>	getAtoms()
SortedSet<DLPLiteral>	getLiterals()
Class<? extends net.sf.tweety.logics.commons.syntax.Predicate>	getPredicateCls()
Set<DLPPredicate>	getPredicates()
net.sf.tweety.logics.fol.syntax.FolSignature	getSignature()
Set<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>>	getTerms()
int	hashCode()
boolean	isGround()
DLPNot	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.logics.commons.syntax.ComplexLogicalFormulaAdapter

containsTermsOfType, exchange, getTerms, isLiteral, 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.ComplexLogicalFormula

exchange, isWellFormed, substitute

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

isLiteral

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

containsTermsOfType, getTerms

Constructor Detail

DLPNot

public DLPNot(DLPLiteral inner)

DLPNot

public DLPNot(DLPNot other)

Method Detail

toString

public String toString()

Overrides:

toString 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

equals

public boolean equals(Object obj)

Specified by:

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

Overrides:

equals in class Object

isGround

public boolean isGround()

Specified by:

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

Overrides:

isGround in class net.sf.tweety.logics.commons.syntax.ComplexLogicalFormulaAdapter

clone

public DLPNot 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 interface DLPElement

Specified by:

clone in class DLPElementAdapter

getAtoms

public Set<DLPAtom> getAtoms()

Specified by:

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

Specified by:

getAtoms in interface DLPElement

getPredicates

public Set<DLPPredicate> getPredicates()

Specified by:

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

Specified by:

getPredicates in interface DLPElement

getPredicateCls

public Class<? extends net.sf.tweety.logics.commons.syntax.Predicate> getPredicateCls()

Specified by:

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

Overrides:

getPredicateCls in class DLPElementAdapter

getSignature

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

Specified by:

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

Specified by:

getSignature in interface DLPElement

getTerms

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

Specified by:

getTerms in interface net.sf.tweety.logics.commons.syntax.interfaces.LogicStructure

substitute

public DLPNot 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 interface DLPElement

Throws:

IllegalArgumentException

getLiterals

public SortedSet<DLPLiteral> getLiterals()

Specified by:

getLiterals in interface DLPElement

Returns:

all the literals used in the rule element