public override bool Equals(Object o)
{
if (this == o)
{
return(true);
}
if ((o == null) || !(o is BinarySentence))
{
return(false);
}
BinarySentence bs = (BinarySentence)o;
return((bs.getOperator().Equals(getOperator())) &&
(bs.getFirst().Equals(first)) && (bs.getSecond()
.Equals(second)));
}
public virtual Object visitBinarySentence(BinarySentence fs, Object arg)
{
return new BinarySentence(fs.getOperator(), (Sentence)fs.getFirst()
.accept(this, arg), (Sentence)fs.getSecond().accept(this, arg));
}
public Object visitBinarySentence(BinarySentence bs, Object arg) {
bool? firstValue = (bool?) bs.getFirst().accept(this, null);
bool? secondValue = (bool?) bs.getSecond().accept(this, null);
if (!firstValue.HasValue || !secondValue.HasValue) {
// strictly not true for or/and
// -FIX later
return null;
} else {
String op = bs.getOperator();
if (op.Equals("AND")) {
return firstValue.Value && secondValue.Value;
} else if (op.Equals("OR")) {
return firstValue.Value || secondValue.Value;
} else if (op.Equals("=>")) {
return !(firstValue.Value && !secondValue.Value);
}
else if (op.Equals("<=>"))
{
return firstValue.Equals(secondValue);
}
return null;
}
}
