Example usage for org.antlr.v4.runtime DiagnosticErrorListener DiagnosticErrorListener

Introduction

In this page you can find the example usage for org.antlr.v4.runtime DiagnosticErrorListener DiagnosticErrorListener.

Prototype

public DiagnosticErrorListener() 

Source Link

Document

Initializes a new instance of DiagnosticErrorListener which only reports exact ambiguities.

Usage

From source file:no.ssb.vtl.test.junit.GrammarRule.java

License:Apache License

/**
 * Parse an expression starting from the given <b>ANTLR rule</b>
 * <p>// w  ww  . j  a  va2s . c  o  m
 * In order to get the Rule, use the {@link #withRule(String)} method.
 *
 * @param expression the expression to parse.
 * @param rule       the rule to start from.
 *                   @param diagnostic {@link DiagnosticErrorListener} will be used if true.
 * @return the resulting parse tree.
 * @throws Exception if the expression failed to parse.
 */
public ParserRuleContext parse(String expression, Rule rule, boolean diagnostic) throws Exception {
    Multimap<Integer, String> messages = LinkedListMultimap.create();

    LexerInterpreter lexerInterpreter = grammar.createLexerInterpreter(new ANTLRInputStream(expression));
    GrammarParserInterpreter parserInterpreter = grammar
            .createGrammarParserInterpreter(new CommonTokenStream(lexerInterpreter));

    BaseErrorListener errorListener;
    if (diagnostic) {
        errorListener = new DiagnosticErrorListener();
    } else {
        errorListener = new ConsoleErrorListener();
    }

    BaseErrorListener ruleErrorReporter = new BaseErrorListener() {
        @Override
        public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line,
                int charPositionInLine, String msg, org.antlr.v4.runtime.RecognitionException e) {
            int startLine = line, stopLine = line;
            int startColumn = charPositionInLine, stopColumn = charPositionInLine;
            if (offendingSymbol instanceof Token) {
                Token symbol = (Token) offendingSymbol;
                int start = symbol.getStartIndex();
                int stop = symbol.getStopIndex();
                if (start >= 0 && stop >= 0) {
                    stopColumn = startColumn + (stop - start) + 1;
                }
            }

            messages.put(stopLine,
                    String.format("at [%4s:%6s]:\t%s (%s)\n", String.format("%d,%d", startLine, stopLine),
                            String.format("%d,%d", startColumn, stopColumn), msg,
                            Optional.ofNullable(e).map(ex -> ex.getClass().getSimpleName()).orElse("null")));
        }
    };

    parserInterpreter.setErrorHandler(new GrammarParserInterpreter.BailButConsumeErrorStrategy());
    lexerInterpreter.removeErrorListeners();
    parserInterpreter.removeErrorListeners();

    lexerInterpreter.addErrorListener(errorListener);
    parserInterpreter.addErrorListener(errorListener);
    lexerInterpreter.addErrorListener(ruleErrorReporter);
    parserInterpreter.addErrorListener(ruleErrorReporter);

    ParserRuleContext parse = parserInterpreter.parse(rule.index);

    if (!messages.isEmpty()) {

        StringBuilder expressionWithErrors = new StringBuilder();
        LineNumberReader expressionReader = new LineNumberReader(new StringReader(expression));
        String line;
        while ((line = expressionReader.readLine()) != null) {
            int lineNumber = expressionReader.getLineNumber();
            expressionWithErrors.append(String.format("\t%d:%s%n", lineNumber, line));
            if (messages.containsKey(lineNumber)) {
                expressionWithErrors.append(String.format("%n"));
                for (String message : messages.get(lineNumber)) {
                    expressionWithErrors.append(message);
                }
            }
        }
        throw new Exception(
                String.format("errors parsing expression:%n%n%s%n", expressionWithErrors.toString()));
    }

    return parse;
}

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From source file:org.apache.olingo.server.core.uri.testutil.ParserWithLogging.java

License:Apache License

@Override
protected void addStage1ErrorListener(final UriParserParser parser) {
    // Log error to console
    parser.removeErrorListeners();/*from   www . java 2 s. com*/
    parser.addErrorListener(errorCollector1);
    parser.addErrorListener(new DiagnosticErrorListener());
}

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From source file:org.apache.olingo.server.core.uri.testutil.ParserWithLogging.java

License:Apache License

@Override
protected void addStage2ErrorListener(final UriParserParser parser) {
    // Log error to console
    parser.removeErrorListeners();//from   w w w  . j a va  2 s .  c om
    parser.addErrorListener(errorCollector2);
    parser.addErrorListener(new DiagnosticErrorListener());
}

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From source file:org.btrplace.safeplace.spec.SpecScanner.java

License:Open Source License

private static CommonTokenStream getTokens(String source) throws IOException {
    CharStream is = CharStreams.fromReader(new StringReader(source));
    CstrSpecLexer lexer = new CstrSpecLexer(is);
    lexer.removeErrorListeners();/*  w w  w  .j  a va2  s  .  c  om*/
    lexer.addErrorListener(new DiagnosticErrorListener());
    return new CommonTokenStream(lexer);
}

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