AbstractPQLQuery.java 文件源码

protected String getNodeText(Tree tree, List<String> ruleNames) {
    if (ruleNames != null) {
        if(tree instanceof RuleNode) {
            int ruleIndex = ((RuleNode)tree).getRuleContext().getRuleIndex();
            String ruleName = (String)ruleNames.get(ruleIndex);
            return ruleName;
        }

        if(tree instanceof ErrorNode)
            return tree.toString();

        if(tree instanceof TerminalNode) {
            Token symbol = ((TerminalNode)tree).getSymbol();
            if(symbol != null) {
                String s = symbol.getText();
                return s;
            }
        }
    }

    Object payload = tree.getPayload();

    if(payload instanceof Token)
        return ((Token)payload).getText();
    else
        return tree.getPayload().toString();
}