GoLangTreeListener.java 文件源码

/**
 * Searches the children of the given context for a context of the given clazz
 * type and returns its Text Value. If there are multiple relevant child nodes,
 * we will return the text value for one of them at random.
 */
public String getChildContextText(RuleContext ctx) {

    if (ctx == null) {
        return "";
    }
    if (ctx instanceof TypeNameContext) {
        return ctx.getText();
    }

    String s = "";
    for (int i = 0; i < ctx.getChildCount(); i++) {
        if (!(ctx.getChild(i) instanceof TerminalNodeImpl)) {
            try {
                String t = getChildContextText((RuleContext) ctx.getChild(i));
                if (!t.isEmpty()) {
                    s += t + ",";
                }
            } catch (Exception e) {
                // do nothing
            }
        }
    }
    return s.replaceAll(",$", "");
}