Node.java 文件源码

private static String getNodeText(@NotNull Tree t, @Nullable List<String> ruleNames, @Nullable List<String> tokenNames) {

        if (t instanceof RuleNode) {
            int ruleIndex = ((RuleNode) t).getRuleContext().getRuleIndex();
            return ruleNames.get(ruleIndex);
        }

        if (t instanceof ErrorNode) {
            return t.toString();
        }

        if (t instanceof TerminalNode) {
            Token symbol = ((TerminalNode) t).getSymbol();
            if (symbol != null) {
                return tokenNames.get(symbol.getType());
            }
        }

        // no recog for rule names
        Object payload = t.getPayload();

        if (payload instanceof Token) {
            return ((Token) payload).getText();
        }

        return t.getPayload().toString();

    }