@@ -0,0 +1,871 @@
+package com.alibaba.json.bvt.bug;%0A%0Aimport com.alibaba.fastjson.JSON;%0Aimport com.alibaba.fastjson.TypeReference;%0Aimport junit.framework.TestCase;%0A%0Apublic class Issue569_1 extends TestCase %7B%0A    public void test_for_issue() throws Exception %7B%0A        String json = %22%7B%5C%22result%5C%22:%7B%7D%7D%22;%0A        InterfaceResult%3CValue%3E result = JSON.parseObject(json, new TypeReference%3CInterfaceResult%3CValue%3E%3E() %7B%7D);%0A        assertNotNull(result.getResult());%0A        assertEquals(Value.class, result.getResult().getClass());%0A    %7D%0A%0A    public static class BaseInterfaceResult %7B%0A%0A    %7D%0A%0A    public static class InterfaceResult%3CT%3E extends BaseInterfaceResult%0A    %7B%0A        public T getResult() %7B%0A            return result;%0A        %7D%0A%0A        public void setResult(T result) %7B%0A            this.result = result;%0A        %7D%0A%0A        private T result;%0A    %7D%0A%0A    public static class Value %7B%0A%0A    %7D%0A%7D%0A

add testcase for issue #569