private Sentence transformImpliedSentence(BinarySentence bs)
{
Sentence first = new UnarySentence((Sentence)bs.getFirst().accept(
this, null));
return new BinarySentence("OR", first, (Sentence)bs.getSecond()
.accept(this, null));
}
public override Object visitNotSentence(UnarySentence ns, Object arg)
{
List<Symbol> s = (List<Symbol>)arg;
if (ns.getNegated() is Symbol)
{
s.Add((Symbol)ns.getNegated());
}
else
{
s = SetOps
.union(s, (List<Symbol>)ns.getNegated().accept(this, arg));
}
return s;
}
public override Object visitNotSentence(UnarySentence ns, Object arg)
{
List<Symbol> s = (List<Symbol>)arg;
if (ns.getNegated() is Symbol)
{
// do nothing .do NOT add a negated Symbol
}
else
{
s = SetOps
.union(s, (List<Symbol>)ns.getNegated().accept(this, arg));
}
return s;
}
public override bool Equals(Object o)
{
if (this == o)
{
return(true);
}
if ((o == null) || !(o is UnarySentence))
{
return(false);
}
UnarySentence ns = (UnarySentence)o;
return(ns.negated.Equals(negated));
}
private Sentence transformNotSentence(UnarySentence us)
{
if (us.getNegated() is UnarySentence)
{
return (Sentence)((UnarySentence)us.getNegated()).getNegated()
.accept(this, null);
}
else if (us.getNegated() is BinarySentence)
{
BinarySentence bs = (BinarySentence)us.getNegated();
if (bs.isAndSentence())
{
Sentence first = new UnarySentence((Sentence)bs.getFirst()
.accept(this, null));
Sentence second = new UnarySentence((Sentence)bs.getSecond()
.accept(this, null));
return new BinarySentence("OR", first, second);
}
else if (bs.isOrSentence())
{
Sentence first = new UnarySentence((Sentence)bs.getFirst()
.accept(this, null));
Sentence second = new UnarySentence((Sentence)bs.getSecond()
.accept(this, null));
return new BinarySentence("AND", first, second);
}
else
{
return (Sentence)base.visitNotSentence(us, null);
}
}
else
{
return (Sentence)base.visitNotSentence(us, null);
}
}
public virtual Object visitNotSentence(UnarySentence ns, Object arg)
{
List<Sentence> s = (List<Sentence>)arg;
return SetOps.union(s, (List<Sentence>)ns.getNegated().accept(this, arg));
}
public Object visitNotSentence(UnarySentence fs, Object arg)
{
return fs.getNegated().accept(this, null);
}
public virtual Object visitNotSentence(UnarySentence fs, Object arg)
{
return new UnarySentence((Sentence)fs.getNegated().accept(this, arg));
}
public override Object visitNotSentence(UnarySentence us, Object arg)
{
return transformNotSentence(us);
}
public Object visitNotSentence(UnarySentence fs, Object arg) {
Object negatedValue = fs.getNegated().accept(this, null);
if (negatedValue != null) {
return !((bool) negatedValue);
} else {
return null;
}
}