Example usage for org.antlr.v4.runtime RuleContext toStringTree

Introduction

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

Prototype

public String toStringTree(List<String> ruleNames) 

Source Link

Document

Print out a whole tree, not just a node, in LISP format (root child1 ..

Usage

From source file:com.intuit.karate.core.FeatureParser.java

License:Open Source License

private FeatureParser(Feature feature, InputStream is) {
    this.feature = feature;
    CharStream stream;//from www.  j a  v a  2  s . co m
    try {
        stream = CharStreams.fromStream(is, StandardCharsets.UTF_8);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    KarateLexer lexer = new KarateLexer(stream);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    KarateParser parser = new KarateParser(tokens);
    parser.addErrorListener(errorListener);
    RuleContext tree = parser.feature();
    if (logger.isTraceEnabled()) {
        logger.debug(tree.toStringTree(parser));
    }
    ParseTreeWalker walker = new ParseTreeWalker();
    walker.walk(this, tree);
    if (errorListener.isFail()) {
        String errorMessage = errorListener.getMessage();
        logger.error("not a valid feature file: {} - {}", feature.getResource().getRelativePath(),
                errorMessage);
        throw new RuntimeException(errorMessage);
    }
}

---