关于重复依赖检测机制

[liaowang11]

请问重复依赖检测机制是什么? 目前好像没有关闭重复依赖但是开启循环依赖的方法?
如下代码ResultList不会产生$ref, ResultMap会产生$ref.

---

    @Test
    public void testJSON() {
        ResultMap resultMap = new ResultMap();
        resultMap.setA(Collections.emptyMap());
        resultMap.setB(Collections.emptyMap());
        System.out.println(JSON.toJSONString(resultMap));

        ResultList resultList = new ResultList();
        resultList.setA(Collections.emptyList());
        resultList.setB(Collections.emptyList());
        System.out.println(JSON.toJSONString(resultList));
    }

    public static class ResultMap {
        private Map<Long, Integer> a;
        private Map<Long, Integer> b;

        public Map<Long, Integer> getA() {
            return a;
        }

        public void setA(Map<Long, Integer> a) {
            this.a = a;
        }

        public Map<Long, Integer> getB() {
            return b;
        }

        public void setB(Map<Long, Integer> b) {
            this.b = b;
        }
    }

    public static class ResultList {
        private List<Long> a;
        private List<Long> b;

        public List<Long> getA() {
            return a;
        }

        public void setA(List<Long> a) {
            this.a = a;
        }

        public List<Long> getB() {
            return b;
        }

        public void setB(List<Long> b) {
            this.b = b;
        }
    }

---

{"a":{},"b":{"$ref":"$.a"}}
{"a":[],"b":[]}

[wenshao]

问题已修复，请用新版本 https://github.com/alibaba/fastjson/releases/tag/1.2.55