private static TokenSource getLexer(String sql, Set<String> terminators) { requireNonNull(sql, "sql is null"); CharStream stream = new CaseInsensitiveStream(new ANTLRInputStream(sql)); return new DelimiterLexer(stream, terminators); }
private static TokenSource getLexer(String sql, Set<String> terminators) { requireNonNull(sql, "sql is null"); CharStream stream = new CaseInsensitiveStream(new ANTLRInputStream(sql)); return new DelimiterLexer(stream, terminators); }
private static ParserRuleContext parseTypeCalculation(String calculation) { TypeCalculationLexer lexer = new TypeCalculationLexer(new CaseInsensitiveStream(new ANTLRInputStream(calculation))); CommonTokenStream tokenStream = new CommonTokenStream(lexer); TypeCalculationParser parser = new TypeCalculationParser(tokenStream); lexer.removeErrorListeners(); lexer.addErrorListener(ERROR_LISTENER); parser.removeErrorListeners(); parser.addErrorListener(ERROR_LISTENER); ParserRuleContext tree; try { // first, try parsing with potentially faster SLL mode parser.getInterpreter().setPredictionMode(PredictionMode.SLL); tree = parser.typeCalculation(); } catch (ParseCancellationException ex) { // if we fail, parse with LL mode tokenStream.reset(); // rewind input stream parser.reset(); parser.getInterpreter().setPredictionMode(PredictionMode.LL); tree = parser.typeCalculation(); } return tree; }
private static ParserRuleContext parseTypeCalculation(String calculation) { TypeCalculationLexer lexer = new TypeCalculationLexer(new CaseInsensitiveStream(new ANTLRInputStream(calculation))); CommonTokenStream tokenStream = new CommonTokenStream(lexer); TypeCalculationParser parser = new TypeCalculationParser(tokenStream); lexer.removeErrorListeners(); lexer.addErrorListener(ERROR_LISTENER); parser.removeErrorListeners(); parser.addErrorListener(ERROR_LISTENER); ParserRuleContext tree; try { // first, try parsing with potentially faster SLL mode parser.getInterpreter().setPredictionMode(PredictionMode.SLL); tree = parser.typeCalculation(); } catch (ParseCancellationException ex) { // if we fail, parse with LL mode tokenStream.reset(); // rewind input stream parser.reset(); parser.getInterpreter().setPredictionMode(PredictionMode.LL); tree = parser.typeCalculation(); } return tree; }
private Node invokeParser(String name, String sql, Function<SqlBaseParser, ParserRuleContext> parseFunction, ParsingOptions parsingOptions) SqlBaseLexer lexer = new SqlBaseLexer(new CaseInsensitiveStream(CharStreams.fromString(sql))); CommonTokenStream tokenStream = new CommonTokenStream(lexer); SqlBaseParser parser = new SqlBaseParser(tokenStream);
private Node invokeParser(String name, String sql, Function<SqlBaseParser, ParserRuleContext> parseFunction, ParsingOptions parsingOptions) SqlBaseLexer lexer = new SqlBaseLexer(new CaseInsensitiveStream(CharStreams.fromString(sql))); CommonTokenStream tokenStream = new CommonTokenStream(lexer); SqlBaseParser parser = new SqlBaseParser(tokenStream);