private CT_DrawParam getDrawParamFinal(String id, Set<String> visited) {
    if (id == null || visited.contains(id)) {
        return null; // 避免循环引用
    }
    visited.add(id);

    CT_DrawParam current = drawParamMap.get(id);
    return superDrawParam(current, visited);
}

/**
 * 寻找继承属性用于覆盖当前为空的属性
 *
 * @param current 当前需要子节点
 * @return 补全后的子节点副本
 */
public CT_DrawParam superDrawParam(CT_DrawParam current, Set<String> visited) {
    if (current == null) {
        return null;
    }
    // 复制为副本防止造成污染
    current = current.clone();
    ST_RefID relative = current.getRelative();
    if (relative == null) {
        return current;
    }
    // 递归的寻找上一级继承的参数的最终参数
    CT_DrawParam parent = getDrawParamFinal(relative.toString(), visited);
    if (parent == null) {
        return current;
    }
    // 本次绘制属性将覆盖其引用的绘制参数中的同名属性。
    if (current.attributeValue("LineWidth") == null
            && parent.attributeValue("LineWidth") != null) {
        current.addAttribute("LineWidth", parent.attributeValue("LineWidth"));
    }
    if (current.attributeValue("Join") == null
            && parent.attributeValue("Join") != null) {
        current.addAttribute("Join", parent.attributeValue("Join"));
    }
    if (current.attributeValue("Cap") == null
            && parent.attributeValue("Cap") != null) {
        current.addAttribute("Cap", parent.attributeValue("Cap"));
    }
    if (current.attributeValue("DashOffset") == null
            && parent.attributeValue("DashOffset") != null) {
        current.addAttribute("DashOffset", parent.attributeValue("DashOffset"));
    }
    if (current.attributeValue("DashPattern") == null
            && parent.attributeValue("DashPattern") != null) {
        current.addAttribute("DashPattern", parent.attributeValue("DashPattern"));
    }
    if (current.attributeValue("MiterLimit") == null
            && parent.attributeValue("MiterLimit") != null) {
        current.addAttribute("MiterLimit", parent.attributeValue("MiterLimit"));
    }
    if (current.getFillColor() == null
            && parent.getFillColor() != null) {
        current.setFillColor(parent.getFillColor());
    }
    if (current.getStrokeColor() == null
            && parent.getStrokeColor() != null) {
        current.setStrokeColor(parent.getStrokeColor());
    }
    return current;
}