realm怎样支持hashmap

realm不支持hashmap这种形式
stackoverflow给出了解决方案
http://stackoverflow.com/ques...

class MyData extends RealmObject {
    private RealmList<MyMap> myMap;
}

class MyMap extends RealmObject {
    private String key;
    private MyClass value;
}

但是我用gson解析时会报错
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2656 path $.layers[0].icons
因为map是一个对象，而private RealmList<MyMap> myMap;是一个数组
应该怎样解析呢？