SaltTest.java 文件源码

/**
 * Parse the string passed as parameter returning the string representing the structure of the UI
 * described by the parameter.
 * @param document
 * @return
 * @throws Exception
 */
private String parse(String document) throws Exception {
    ANTLRInputStream input = new ANTLRInputStream(document);
    SaltLexer lexer = new SaltLexer(input);
    // The lexer should not recover errors.
    lexer.addErrorListener(new BaseErrorListener() {

        @Override
        public void syntaxError(Recognizer<?, ?> arg0, Object arg1, int arg2,
                int arg3, String arg4, RecognitionException arg5) {
            throw new RuntimeException(arg5);
        }

    });
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    SaltParser parser = new SaltParser(tokens);
    ParseTree tree = parser.document();
    if (parser.getNumberOfSyntaxErrors() > 0) {
        throw new SyntaxException("Syntax error into the document: " + document);
    }
    //
    SaltTextVisitor visitor = new SaltTextVisitor(parser);
    return visitor.visit(tree);
}