Example usage for org.antlr.v4.runtime.tree Trees toStringTree

Introduction

In this page you can find the example usage for org.antlr.v4.runtime.tree Trees toStringTree.

Prototype

public static String toStringTree(final Tree t, final List<String> ruleNames) 

Source Link

Document

Print out a whole tree in LISP form.

Usage

From source file:es.ucm.fdi.ac.parser.AntlrTokenizer.java

License:Open Source License

public void tokenize(String source, String sourceFile, PrintWriter out) {
    Writer debugWriter = null;/*from w ww .  j a va2 s .  c o  m*/
    try {
        Lexer lexer = (Lexer) language.lexerConstructor.newInstance(new ANTLRInputStream(source));
        final CommonTokenStream tokens = new CommonTokenStream(lexer);
        tokens.fill();

        if (log.isDebugEnabled()) {
            try {
                debugWriter = new BufferedWriter(
                        new FileWriter(Files.createTempFile("tokens-" + NDC.get() + "-", ".txt").toFile()));
            } catch (IOException ioe) {
                log.warn("Could not create debugWriter", ioe);
            }
        }

        for (final Token tok : tokens.getTokens()) {
            out.print(tokenToString(tok));
            if (log.isDebugEnabled()) {
                log.debug(tok);
                if (debugWriter != null) {
                    debugWriter.write(tokenToString(tok));
                }
            }
        }

        if (parse) {
            Parser parser = (Parser) language.parserConstructor.newInstance(tokens);
            parser.setErrorHandler(new BailErrorStrategy());
            ParserRuleContext parserRuleContext = (ParserRuleContext) language.parserMethod.invoke(parser);

            if (log.isDebugEnabled()) {
                log.debug(Trees.toStringTree(parserRuleContext, parser));
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        throw new IllegalArgumentException("Bad token in source, or failed to parse", e);
    } finally {
        out.flush();
        if (log.isDebugEnabled() && debugWriter != null) {
            try {
                debugWriter.close();
            } catch (IOException ioe) {
                log.warn("Could not close debugWriter", ioe);
            }
        }
    }
}

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From source file:io.proleap.cobol.runner.impl.CobolParseTestRunnerImpl.java

License:Open Source License

protected void doCompareParseTree(final File treeFile, final StartRuleContext startRule,
        final CobolParser parser) throws IOException {
    final String treeFileData = FileUtils.readFileToString(treeFile, StandardCharsets.UTF_8);

    if (!StringUtils.isEmpty(treeFileData)) {
        LOG.info("Comparing parse tree with file {}.", treeFile.getName());

        final String inputFileTree = Trees.toStringTree(startRule, parser);
        final String cleanedInputFileTree = io.proleap.cobol.util.CobolTestStringUtils
                .cleanFileTree(inputFileTree);
        final String cleanedTreeFileData = io.proleap.cobol.util.CobolTestStringUtils
                .cleanFileTree(treeFileData);

        assertEquals(cleanedTreeFileData, cleanedInputFileTree);
    } else {/*ww  w  . jav a 2  s . c  om*/
        LOG.info("Ignoring empty parse tree file {}.", treeFile.getName());
    }
}

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From source file:io.proleap.vb6.runner.impl.VbParseTestRunnerImpl.java

License:Open Source License

protected void doCompareParseTree(final File treeFile, final StartRuleContext startRule,
        final VisualBasic6Parser parser) throws IOException {

    final String treeFileData = FileUtils.readFileToString(treeFile);

    if (!Strings.isBlank(treeFileData)) {
        LOG.info("Comparing parse tree with file {}.", treeFile.getName());

        final String inputFileTree = Trees.toStringTree(startRule, parser);
        final String cleanedInputFileTree = io.proleap.vb6.util.StringUtils.cleanFileTree(inputFileTree);
        final String cleanedTreeFileData = io.proleap.vb6.util.StringUtils.cleanFileTree(treeFileData);

        assertEquals(cleanedTreeFileData, cleanedInputFileTree);
    } else {//from  w w w  . j a  v a2 s  .co m
        LOG.info("Ignoring empty parse tree file {}.", treeFile.getName());
    }
}

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