Examples with Recognizer org.antlr.v4.runtime.Recognizer used on opensource projects

Example 76 with Recognizer

use of org.antlr.v4.runtime.Recognizer in project drools by kiegroup.

the class FEELParserErrorListener method syntaxError.

@Override
public void syntaxError(final Recognizer<?, ?> recognizer, final Object offendingSymbol, final int line, final int charPositionInLine, final String msg, final RecognitionException e) {
    final SyntaxErrorEvent error;
    final CommonToken token = (CommonToken) offendingSymbol;
    final int tokenIndex = token.getTokenIndex();
    final Parser parser = (Parser) recognizer;
    if (parser.getRuleInvocationStack().contains("nameDefinitionWithEOF")) {
        error = generateInvalidVariableError(offendingSymbol, line, charPositionInLine, e, token);
    } else if ("}".equals(token.getText()) && tokenIndex > 1 && ":".equals(parser.getTokenStream().get(tokenIndex - 1).getText())) {
        error = new SyntaxErrorEvent(FEELEvent.Severity.ERROR, Msg.createMessage(Msg.MISSING_EXPRESSION, parser.getTokenStream().get(tokenIndex - 2).getText()), e, line, charPositionInLine, offendingSymbol);
    } else if (e != null && parser.getRuleInvocationStack().get(0).equals("ifExpression")) {
        final List<String> expected = toList(e.getExpectedTokens(), e.getRecognizer().getVocabulary());
        if (expected.contains("ELSE")) {
            error = new SyntaxErrorEvent(FEELEvent.Severity.ERROR, Msg.createMessage(Msg.IF_MISSING_ELSE, token.getText(), msg), e, line, charPositionInLine, offendingSymbol);
        } else if (expected.contains("THEN")) {
            error = new SyntaxErrorEvent(FEELEvent.Severity.ERROR, Msg.createMessage(Msg.IF_MISSING_THEN, token.getText(), msg), e, line, charPositionInLine, offendingSymbol);
        } else {
            // fallback.
            error = new SyntaxErrorEvent(FEELEvent.Severity.ERROR, msg, e, line, charPositionInLine, offendingSymbol);
        }
    } else {
        error = new SyntaxErrorEvent(FEELEvent.Severity.ERROR, msg, e, line, charPositionInLine, offendingSymbol);
    }
    // if the event manager is set, notify listeners, otherwise store the error in the errors list
    if (eventsManager != null) {
        FEELEventListenersManager.notifyListeners(eventsManager, () -> error);
    } else {
        if (errors == null) {
            errors = new ArrayList<>();
        }
        errors.add(error);
    }
}