RefactorUtils.java 文件源码

public static List<TerminalNode> getAllRuleRefNodes(Parser parser, ParseTree tree, String ruleName) {
    List<TerminalNode> nodes = new ArrayList<TerminalNode>();
    Collection<ParseTree> ruleRefs;
    if ( Grammar.isTokenName(ruleName) ) {
        ruleRefs = XPath.findAll(tree, "//lexerRuleBlock//TOKEN_REF", parser);
    }
    else {
        ruleRefs = XPath.findAll(tree, "//ruleBlock//RULE_REF", parser);
    }
    for (ParseTree node : ruleRefs) {
        TerminalNode terminal = (TerminalNode)node;
        Token rrefToken = terminal.getSymbol();
        String r = rrefToken.getText();
        if ( r.equals(ruleName) ) {
            nodes.add(terminal);
        }
    }
    if ( nodes.size()==0 ) return null;
    return nodes;
}