杰克逊mixins抛出stackoverflow错误

Question

Hi I'm writing a Rest service for a user object retrieved from common framework of my company.

User userobj = commonframework.getuser(userid); //user is interface

The problem is the user object from common framework has an object with 2 getters for a String field like "isSomeflag()" and "getSomeflag()" I cannot modify the code from commonframework

I ended up using ** Jackson Mixins** but it is throwing stackoverflow error. Any help will be appreciated.

Code below

    public abstract class IgnoreMixin {
    @JsonIgnore 
    public abstract String isServiceOnlyflg();
}

In service method:

@Produces(MediaType.APPLICATION_JSON)
public Response createUserInfo{
mapper = new ObjectMapper();
mapper.getSerializationConfig().addMixInAnnotations(DealerImpl.class,IgnoreMixin.class);
writer = mapper.writer().withDefaultPrettyPrinter();
return writer.writeValueAsString(userobj);
}

Approach -2

I tried creating local class with similar property and try mapping those properties from user object to local object. inital inference the problem class is referenced only once in user object

But The problem is user contains many member object which in turn refer the problem object many times and I have to create many local copy of many classes from framework user structure

Any solution for this

Answer 1

Accoring to the documentation if the method in your base class are isSomeflag() and getSomeflag() . You should use

 @JsonProperty("newProp") abstract int isSomeflag()
 @JsonIgnore abstract int getSomeflag();

Ignore one and let the other be marshall with the JsonProperty.

Also probably you are within a circular dependency that you need to break with jsonfilter, check this link

 FilterProvider filterProvider = new SimpleFilterProvider()
      .addFilter("filtermixin", SimpleBeanPropertyFilter.serializeAllExcept("circulardependency"));