Skip to content
This repository was archived by the owner on Aug 9, 2020. It is now read-only.

java.lang.ClassCastException: com.google.gson.internal.LinkedTreeMap #41

Closed
androidle opened this issue Jun 22, 2016 · 6 comments
Closed

java.lang.ClassCastException: com.google.gson.internal.LinkedTreeMap #41

androidle opened this issue Jun 22, 2016 · 6 comments
Labels
help wanted

Comments

@androidle
Copy link

androidle commented Jun 22, 2016 •
edited
Loading

i use retrofit + rxjava + rxcache in my project,and the response json data format is:

{"data":{},"status":200}

i define a BaseResponse.class ps : data is a object not list:

public class BaseResponse<T> { public int status; public T data; }

i define a cache interface method :
@LifeCache(duration = 20, timeUnit = TimeUnit.MINUTES) Observable<Reply<BaseResponse<UserBasicInfoResponse>>> loadUserBasicInfo(Observable<BaseResponse<UserBasicInfoResponse>> userBasicInfoResponseObservable , DynamicKey userId , EvictProvider evictProvider);

when racache load from memory it's ok,but raCache load from disk an error has occurred(java.lang.ClassCastException: com.google.gson.internal.LinkedTreeMap ),I don't know how to solve this question.

when i debug I find diskCache lose type "UserBasicInfoResponse", do you have any advice about it ?

thinks!
@VictorAlbertos
Copy link
Owner

VictorAlbertos commented Jun 22, 2016 •
edited
Loading

Don't save the object BaseResponse, instead, use map operator to transform it to UserBasicInfoResponse prior to calling RxCache.

 Observable<UserBasicInfoResponse> oUser = userBasicInfoResponseObservable
     .map(userBasicInfoResponse -> userBasicInfoResponse.data);

rxProviders.loadUserBasicInfo(oUser , new DynamicKey(1) , new EvictProvider(false));

@androidle
Copy link
Author

Thinks so much for your quick reply!
but I still have some confused ,since data from net is Observable<BaseResponse<UserBasicInfoResponse>>,how can I save UserBasicInfoResponse instead of BaseResponse<UserBasicInfoResponse> , do you give me some detail advices ?
thanks!

my core code about it as below
This is the core method:

 @Override
    public Observable<UserBasicInfo> getUserBasicInfo(final boolean isUpdateNow) {

        return mLoginUserCache.get()
                .flatMap(new Func1<User, Observable<Reply<BaseResponse<UserBasicInfoResponse>>>>() {
                    @Override
                    public Observable<Reply<BaseResponse<UserBasicInfoResponse>>> call(User user) {
                        return mUserCacheProviders.loadUserBasicInfo(mUserApi.loadUserBasicInfo(user.getUserId()), new DynamicKey(user.getUserId()), new EvictProvider(isUpdateNow));
                    }
                }).flatMap(new Func1<Reply<BaseResponse<UserBasicInfoResponse>>, Observable<UserBasicInfo>>() {
                    @Override
                    public Observable<UserBasicInfo> call(Reply<BaseResponse<UserBasicInfoResponse>> baseResponseReply) {
                        if (null == baseResponseReply || null == baseResponseReply.getData()) {
                            return Observable.empty();
                        }
                        BaseResponse<UserBasicInfoResponse> userBasicInfoResponseBaseResponse = baseResponseReply.getData();
                        if (!userBasicInfoResponseBaseResponse.isSuccess()) {
                            return Observable.error(new ServerResponseException(userBasicInfoResponseBaseResponse.getMsg()));
                        }
                        ThinkcooLog.d("---->", userBasicInfoResponseBaseResponse.toString());
                        UserBasicInfoResponse userBasicInfoResponse = userBasicInfoResponseBaseResponse.getData();
                        return Observable.just(UserBasicInfo.fromServerResponse(userBasicInfoResponse, mServerDataConverter));
                    }
                });

    }

This is the net API

 @POST("personalinfor.json")
Observable<BaseResponse<UserBasicInfoResponse>> loadUserBasicInfo(@Query("userId") String userId);

This is the cache interface method

@LifeCache(duration =5, timeUnit = TimeUnit.SECONDS)
    Observable<Reply<BaseResponse<UserBasicInfoResponse>>> loadUserBasicInfo(Observable<BaseResponse<UserBasicInfoResponse>> userBasicInfoResponseObservable
            , DynamicKey userId , EvictProvider evictProvider);

@VictorAlbertos
Copy link
Owner

VictorAlbertos commented Jun 22, 2016 •
edited
Loading

The endpoint should be

@LifeCache(duration =5, timeUnit = TimeUnit.SECONDS)
    Observable<UserBasicInfoResponse> loadUserBasicInfo(Observable<UserBasicInfoResponse> userBasicInfoResponseObservable
            , DynamicKey userId , EvictProvider evictProvider);

And you just need to apply the map operator to transform the data. I suggest to you to learn a little more rxjava before attempting to use RxCache, or any reactive library for that matters. ;)

@androidle
Copy link
Author

OK,thank you so much!

@androidle androidle reopened this Jun 23, 2016
@androidle androidle reopened this Jun 23, 2016
@darenegade darenegade mentioned this issue Jun 25, 2016
Closed
@guobinAndroid
Copy link

but if i want to save just baseResponse, how can i do @VictorAlbertos

@ml-bright
Copy link

this is my method to avoid use BaseResponse<T>

@VictorAlbertos help me that whether this can sovle problem

#73

@BryceLee BryceLee mentioned this issue Aug 12, 2019
Closed
Sign up for free to subscribe to this conversation on GitHub. Already have an account? Sign in.
Assignees
No one assigned
Labels
help wanted
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
4 participants
@VictorAlbertos @ml-bright @androidle @guobinAndroid