QueryParserImpl.java 文件源码

/**
 * Parse the {@link GraqlParser} into a Java object, where errors are reported to the given
 * {@link GraqlErrorListener}.
 */
final T parse(GraqlParser parser, GraqlErrorListener errorListener) {
    S tree;

    try {
        tree = parseTree(parser);
    } catch (ParseCancellationException e) {
        // If we're using the BailErrorStrategy, we will throw here
        // This strategy is designed for parsing very large files and cannot provide useful error information
        throw GraqlSyntaxException.parsingError("syntax error");
    }

    if (errorListener.hasErrors()) {
        throw GraqlSyntaxException.parsingError(errorListener.toString());
    }

    return visit(getQueryVisitor(), tree);
}