QueryListenerImpl.java 文件源码

public void walkTree() {
    try {
        init();
        QueryLexer lexer = new QueryLexer(new ANTLRInputStream(new StringReader(queryStr)));
        CommonTokenStream token = new CommonTokenStream(lexer);
        QueryParser parser = new QueryParser(token);
        parser.setBuildParseTree(true);
        QueryParser.ScriptContext tree = parser.script(); // parse
        ParseTreeWalker parseTreeWalker = new ParseTreeWalker();
        parseTreeWalker.walk( this, tree);
        //check for key# if size = 1
        checkPredicateStack();
    } catch (Exception ex) {
        logger.error(ex.getMessage());
        throw new QueryException( ex.getMessage(), ex );
    }
}