Package edu.harvard.seas.pl.abcdatalog.ast

Class NegatedAtom

java.lang.Object

edu.harvard.seas.pl.abcdatalog.ast.NegatedAtom

All Implemented Interfaces:

Premise

public class NegatedAtom
extends Object
implements Premise

A negated atom. Typically a negated atom is considered to hold during evaluation if the atom it negates is not provable.

Constructor Summary

Constructors

Constructor	Description
NegatedAtom(PositiveAtom atom)
NegatedAtom(PredicateSym pred, Term[] args)

Method Summary

Modifier and Type	Method	Description
<I, O> O	accept(PremiseVisitor<I,O> visitor, I state)
Premise	applySubst(Substitution subst)
PositiveAtom	asPositiveAtom()
boolean	equals(Object obj)
Term[]	getArgs()
PredicateSym	getPred()
int	hashCode()
boolean	isGround()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

NegatedAtom

public NegatedAtom(PredicateSym pred,
 Term[] args)

NegatedAtom

public NegatedAtom(PositiveAtom atom)

Method Details

accept

public <I,
O> O accept(PremiseVisitor<I,O> visitor,
 I state)

Specified by:

accept in interface Premise

getArgs

public Term[] getArgs()

getPred

public PredicateSym getPred()

isGround

public boolean isGround()

asPositiveAtom

public PositiveAtom asPositiveAtom()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

applySubst

public Premise applySubst(Substitution subst)

Specified by:

applySubst in interface Premise