@Override
public Expression parse(Parser parser, ParserToken token) throws ParseException {
if (parser.hasNext()
&& !parser.tokenStream().lookAheadType(0).equals(Operator.AND)
&& !parser.tokenStream().lookAheadType(0).equals(Operator.OR)
&& !parser.tokenStream().lookAheadType(0).equals(CommonTypes.CLOSEPARENS)) {
return new BinaryOperatorExpression(
new ValueExpression(token.text, token.type),
new ParserToken(defaultOperator.toString(), defaultOperator),
parser.next());
}
return new ValueExpression(token.text, token.getType());
}
public SerializablePredicate<HString> parse(String query) throws ParseException {
Parser parser = new Parser(grammar, lexer.lex(query));
List<SerializablePredicate<HString>> predicates = new ArrayList<>();
while (parser.hasNext()) {
Expression expression = parser.next();
predicates.add(generate(expression));
}
if (predicates.isEmpty()) {
return d -> true;
}
SerializablePredicate<HString> finalPredicate = predicates.get(0);
for (int i = 1; i < predicates.size(); i++) {
finalPredicate =
defaultOperator == Operator.AND
? and(finalPredicate, predicates.get(i))
: or(finalPredicate, predicates.get(i));
}
return finalPredicate;
}