Develop Reference

How to insert RealmList to RealmDB

I am trying to insert realm lists to my realmdb in my first insert there is no problem but when I insert another realmList with a different class, my old values are deleted. So how can I insert a realmlist to DB? inserts are done separately.
RealmList<Product> insertedProduct = new RealmList<Product>();
RealmList<ProductSubCategory> insertedSubCategory = new RealmList<ProductSubCategory>();
RealmList<ProductMainCategory> insertedMainCategory = new RealmList<ProductMainCategory>();
... inserting to realm list firt time ...
insertRealmList(insertedProduct); //inserting to realmDB first time
insertRealmList(insertedSubCategory); //inserting to realmDB first time
insertRealmList(insertedMainCategory); //inserting to realmDB first time
first insert to realmDB
RealmList insert function
private void insertRealmList(final RealmList realmObject) {
mRealm = Realm.getDefaultInstance();
realmTask = mRealm.executeTransactionAsync(
new Realm.Transaction() {
#Override
public void execute(Realm realm) {
realm.copyToRealmOrUpdate(realmObject);
}
},
new Realm.Transaction.OnSuccess() {
#Override
public void onSuccess() {
Log.i(TAG, "onSuccess: successfully inserted data");
}
},
new Realm.Transaction.OnError() {
#Override
public void onError(Throwable error) {
Log.i(TAG, "onError: error while inserting " + "error: " + error);
}
}
);
}
... inserting to realm list second time...
insertRealmList(insertedLanguages); //insert realmDB second time
second insert to realmDB
PRODUCT MODEL
package Model;
import io.realm.RealmList;
import io.realm.RealmObject;
import io.realm.annotations.Ignore;
import io.realm.annotations.Index;
import io.realm.annotations.PrimaryKey;
public class Product extends RealmObject {
#PrimaryKey
#Index
private int ID;
#Index
private int PLU_NO;
private String PRODUCT_NAME;
private String MAIN_CATEGORY;
private String SUB_CATEGORY;
private String TYPE;
private String TUS;
private Double PRICE;
private String CALORIE;
private String COOKING_TIME;
private RealmList<String> PRODUCT_NAME_LANGUAGES;
private RealmList<String> PRODUCT_DESCRIPTION_LANGUAGES;
private String IMAGE_BASE_HORIZONTAL; //4/3
private String IMAGE_BASE_VERTICAL; //16/9
private String VIDEO_NAME; //video name
#Ignore
private int AMOUNT;
#Ignore
private int WINDOW_AMOUNT = 1;
public Product(int ID, int PLU_NO, String PRODUCT_NAME, String MAIN_CATEGORY, String SUB_CATEGORY, String TYPE, String TUS, Double PRICE, String CALORIE, String COOKING_TIME, RealmList<String> PRODUCT_NAME_LANGUAGES, RealmList<String> PRODUCT_DESCRIPTION_LANGUAGES, String IMAGE_BASE_HORIZONTAL, String IMAGE_BASE_VERTICAL, String VIDEO_NAME) {
this.ID = ID;
this.PLU_NO = PLU_NO;
this.PRODUCT_NAME = PRODUCT_NAME;
this.MAIN_CATEGORY = MAIN_CATEGORY;
this.SUB_CATEGORY = SUB_CATEGORY;
this.TYPE = TYPE;
this.TUS = TUS;
this.PRICE = PRICE;
this.CALORIE = CALORIE;
this.COOKING_TIME = COOKING_TIME;
this.PRODUCT_NAME_LANGUAGES = PRODUCT_NAME_LANGUAGES;
this.PRODUCT_DESCRIPTION_LANGUAGES = PRODUCT_DESCRIPTION_LANGUAGES;
this.IMAGE_BASE_HORIZONTAL = IMAGE_BASE_HORIZONTAL;
this.IMAGE_BASE_VERTICAL = IMAGE_BASE_VERTICAL;
this.VIDEO_NAME = VIDEO_NAME;
}
public Product() {
}
public int getID() {
return ID;
}
public void setID(int ID) {
this.ID = ID;
}
public int getPLU_NO() {
return PLU_NO;
}
public void setPLU_NO(int PLU_NO) {
this.PLU_NO = PLU_NO;
}
public String getPRODUCT_NAME() {
return PRODUCT_NAME;
}
public void setPRODUCT_NAME(String PRODUCT_NAME) {
this.PRODUCT_NAME = PRODUCT_NAME;
}
public String getMAIN_CATEGORY() {
return MAIN_CATEGORY;
}
public void setMAIN_CATEGORY(String MAIN_CATEGORY) {
this.MAIN_CATEGORY = MAIN_CATEGORY;
}
public String getSUB_CATEGORY() {
return SUB_CATEGORY;
}
public void setSUB_CATEGORY(String SUB_CATEGORY) {
this.SUB_CATEGORY = SUB_CATEGORY;
}
public String getTYPE() {
return TYPE;
}
public void setTYPE(String TYPE) {
this.TYPE = TYPE;
}
public String getTUS() {
return TUS;
}
public void setTUS(String TUS) {
this.TUS = TUS;
}
public Double getPRICE() {
return PRICE;
}
public void setPRICE(Double PRICE) {
this.PRICE = PRICE;
}
public String getCALORIE() {
return CALORIE;
}
public void setCALORIE(String CALORIE) {
this.CALORIE = CALORIE;
}
public String getCOOKING_TIME() {
return COOKING_TIME;
}
public void setCOOKING_TIME(String COOKING_TIME) {
this.COOKING_TIME = COOKING_TIME;
}
public RealmList<String> getPRODUCT_NAME_LANGUAGES() {
return PRODUCT_NAME_LANGUAGES;
}
public void setPRODUCT_NAME_LANGUAGES(RealmList<String> PRODUCT_NAME_LANGUAGES) {
this.PRODUCT_NAME_LANGUAGES = PRODUCT_NAME_LANGUAGES;
}
public RealmList<String> getPRODUCT_DESCRIPTION_LANGUAGES() {
return PRODUCT_DESCRIPTION_LANGUAGES;
}
public void setPRODUCT_DESCRIPTION_LANGUAGES(RealmList<String> PRODUCT_DESCRIPTION_LANGUAGES) {
this.PRODUCT_DESCRIPTION_LANGUAGES = PRODUCT_DESCRIPTION_LANGUAGES;
}
public String getIMAGE_BASE_HORIZONTAL() {
return IMAGE_BASE_HORIZONTAL;
}
public void setIMAGE_BASE_HORIZONTAL(String IMAGE_BASE_HORIZONTAL) {
this.IMAGE_BASE_HORIZONTAL = IMAGE_BASE_HORIZONTAL;
}
public String getIMAGE_BASE_VERTICAL() {
return IMAGE_BASE_VERTICAL;
}
public void setIMAGE_BASE_VERTICAL(String IMAGE_BASE_VERTICAL) {
this.IMAGE_BASE_VERTICAL = IMAGE_BASE_VERTICAL;
}
public String getVIDEO_NAME() {
return VIDEO_NAME;
}
public void setVIDEO_NAME(String VIDEO_NAME) {
this.VIDEO_NAME = VIDEO_NAME;
}
public int getAMOUNT() {
return AMOUNT;
}
public void setAMOUNT(int AMOUNT) {
this.AMOUNT = AMOUNT;
}
public int getWINDOW_AMOUNT() {
return WINDOW_AMOUNT;
}
public void setWINDOW_AMOUNT(int WINDOW_AMOUNT) {
this.WINDOW_AMOUNT = WINDOW_AMOUNT;
}
public void setDEFAULT_WINDOW_AMOUNT() {
this.WINDOW_AMOUNT = 1;
}
}
LANGUAGE MODEL
package Model;
import io.realm.RealmObject;
public class Language extends RealmObject {
#PrimaryKey
#Index
private int ID;
private String ICON;
private String NAME;
public Language(){
}
public Language(int ID, String ICON, String NAME) {
this.ID = ID;
this.ICON = ICON;
this.NAME = NAME;
}
public int getId() {
return ID;
}
public void setId(int id) {
this.ID = id;
}
public String getICON() {
return ICON;
}
public void setICON(String ICON) {
this.ICON = ICON;
}
public String getName() {
return NAME;
}
public void setName(String name) {
this.NAME = name;
}
}
Other two models are similar with product.

Please try the following method:
private <T extends RealmModel> void insertRealmList(final List<T> objects) {
try (Realm realmInstance = Realm.getDefaultInstance()) {
realmInstance.executeTransaction(realm -> {
for (T object : objects) {
realmInstance.insertOrUpdate(object);
}
});
}
}
Hope this helps!

Retrofit errorExpected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $

I want fetch data from this link https://api.androidhive.info/contacts/.
Using Volley i am able to fetch this data but it is not working for list.
that's way i am using Retrofit but retrofit is not working for multiple class.
Api
public interface Api {
String BASE_URL = "https://api.androidhive.info";
#GET("/contacts")
Call<List<Contacts>> getHeroes();
#GET("phone")
Call<List<Phone>> getphone();
}
Jsonparser class
public class json_pas extends Fragment{
List<Contacts> herolist;
Retrofit retrofit;
TextView textView;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.json_,null);
}
#Override
public void onViewCreated(#NonNull final View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
textView= view.findViewById(R.id.json_tv);
herolist = new ArrayList <>();
retrofit= new Retrofit.Builder().baseUrl(Api.BASE_URL).addConverterFactory(GsonConverterFactory.create()).build();
Api api = retrofit.create(Api.class);
Call<List<Contacts>> call= api.getHeroes();
call.enqueue(new Callback <List <Contacts>>() {
#Override
public void onResponse(Call <List <Contacts>> call, retrofit2.Response <List <Contacts>> response) {
Log.e("pass","1");
herolist = response.body();
}
#Override
public void onFailure(Call <List <Contacts>> call, Throwable t) {
Log.e("error","Retrofit error"+t.getMessage());
}
});
}
}
class model
class Contact {
#SerializedName("id")
#Expose
private String id;
#SerializedName("name")
#Expose
private String name;
#SerializedName("email")
#Expose
private String email;
#SerializedName("address")
#Expose
private String address;
#SerializedName("gender")
#Expose
private String gender;
#SerializedName("phone")
#Expose
private Phone phone;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public Phone getPhone() {
return phone;
}
public void setPhone(Phone phone) {
this.phone = phone;
}
}
class Contacts {
#SerializedName("contacts")
#Expose
private List<Contact> contacts = null;
public List<Contact> getContacts() {
return contacts;
}
public void setContacts(List<Contact> contacts) {
this.contacts = contacts;
}
}
class Phone {
#SerializedName("mobile")
#Expose
private String mobile;
#SerializedName("home")
#Expose
private String home;
#SerializedName("office")
#Expose
private String office;
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public String getHome() {
return home;
}
public void setHome(String home) {
this.home = home;
}
public String getOffice() {
return office;
}
public void setOffice(String office) {
this.office = office;
}
}
please help me

You need to parse it in a JsonObject and get the contacts field which have the array! as now it's expecting a list of Contacts object as stated in the error message
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Contacts {
#SerializedName("contacts")
#Expose
private List<Contact> contacts = null;
public List<Contact> getContacts() {
return contacts;
}
public void setContacts(List<Contact> contacts) {
this.contacts = contacts;
}
}
and in the retrofit interface
#GET("/contacts")
Call<Contacts> getHeroes();

Android Nested Objects and Retrofit2

I am reading a JSON like this:
{
"matches": [{
"id": 246119,
"utcDate": "2018-08-17T18:15:00Z",
"status": "FINISHED",
"homeTeam": {
"id": 298,
"name": "Girona FC"
},
"awayTeam": {
"id": 250,
"name": "Real Valladolid CF"
},
"score": {
"winner": "DRAW",
"duration": "REGULAR"
}
}]
}
I must say that the JSON is valid. I am consuming this JSON through an API. I can correctly read the properties "id", "utc" and "status", but I could not with "score", "awayTeam" and "homeTeam". I don't really know how to work those properties. I'd like to handle each propertie of score, awayTeam, and homeTeam individually, for example, I want to get just the name of awayTeam and homeTeam and the 2 properties of score.
This, is my code:
MainActivity
public class MainActivity extends AppCompatActivity {
private Retrofit retrofit;
private static final String TAG = "Football";
private RecyclerView recyclerView;
private ListaPartidosAdapter listaPartidosAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView)findViewById(R.id.recyclerView);
listaPartidosAdapter = new ListaPartidosAdapter(this);
recyclerView.setAdapter(listaPartidosAdapter);
recyclerView.setHasFixedSize(true);
final LinearLayoutManager layoutManager = new LinearLayoutManager(this, VERTICAL, true);
recyclerView.setLayoutManager(layoutManager);
retrofit = new Retrofit.Builder()
.baseUrl("http://api.football-data.org/v2/")
.addConverterFactory(GsonConverterFactory.create())
.build();
obtenerDatos();
}
private void obtenerDatos() {
footballdataService service = retrofit.create(footballdataService.class);
Call<PartidosRespuesta> partidosRespuestaCall = service.obtenerlistaPartidos();
partidosRespuestaCall.enqueue(new Callback<PartidosRespuesta>() {
#Override
public void onResponse(Call<PartidosRespuesta> call, Response<PartidosRespuesta> response) {
if(response.isSuccessful()) {
PartidosRespuesta partidosRespuesta = response.body();
ArrayList<Partido> listaPartidos = partidosRespuesta.getMatches();
listaPartidosAdapter.adicionarListaPartidos(listaPartidos);
}
else {
Log.e(TAG, "onResponse: " + response.errorBody());
}
}
#Override
public void onFailure(Call<PartidosRespuesta> call, Throwable t) {
Log.e(TAG, "onFailure: " + t.getMessage());
}
});
}
}
Now this is my interface. footballdataService
public interface footballdataService {
#GET("competitions/2014/matches")
Call<PartidosRespuesta> obtenerlistaPartidos();
}
This is PartidosRespuestas class
public class PartidosRespuesta {
private ArrayList<Partido> matches;
public ArrayList<Partido> getMatches() {
return matches;
}
public void setMatches(ArrayList<Partido> matches) {
this.matches = matches;
}
}
This, is the adapter.
public class ListaPartidosAdapter extends RecyclerView.Adapter<ListaPartidosAdapter.ViewHolder> {
private static final String TAG = "Football_Adapter";
private ArrayList<Partido> dataset;
private Context context;
public ListaPartidosAdapter(Context context) {
this.context = context;
dataset = new ArrayList<Partido>();
}
#Override
public ListaPartidosAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_partidos, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(ListaPartidosAdapter.ViewHolder holder, int position) {
Partido p = dataset.get(position);
holder.status.setText(p.getId());
}
#Override
public int getItemCount() {
return dataset.size();
}
public void adicionarListaPartidos(ArrayList<Partido> listaPartidos){
dataset.addAll(listaPartidos);
notifyDataSetChanged();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private TextView status;
public ViewHolder(View itemView) {
super(itemView);
status = (TextView) itemView.findViewById(R.id.status);
}
}
}
And this.., is Partido class
public class Partido {
private String id;
private String utcDate;
private String status;
private EquipoCasa homeTeam;
private EquipoVisita AwayTeam;
private Puntaje score;
public String getId() {
return id;
}
public String getUtcDate() {
return utcDate;
}
public String getStatus() {
return status;
}
public EquipoCasa getHomeTeam() {
return homeTeam;
}
public EquipoVisita getAwayTeam() {
return AwayTeam;
}
public Puntaje getScore() {
return score;
}
public void setId(String id) {
this.id = id;
}
public void setUtcDate(String utcDate) {
this.utcDate = utcDate;
}
public void setStatus(String status) {
this.status = status;
}
public void setHomeTeam(EquipoCasa homeTeam) {
this.homeTeam = homeTeam;
}
public void setAwayTeam(EquipoVisita awayTeam) {
AwayTeam = awayTeam;
}
public void setScore(Puntaje score) {
this.score = score;
}
public class EquipoCasa {
private String id;
private String name;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
public class EquipoVisita {
private String id;
private String name;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
public class Puntaje {
private String winner;
private String duration;
public String getWinner() {
return winner;
}
public void setWinner(String winner) {
this.winner = winner;
}
public String getDuration() {
return duration;
}
public void setDuration(String duration) {
this.duration = duration;
}
}
}

POJO classes of your code should this:
AwayTeam.java
//AwayTeam
public class AwayTeam {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("name")
#Expose
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
PartidosRespuesta.java
//Object response
public class PartidosRespuesta {
#SerializedName("matches")
#Expose
private List<Match> matches = null;
public List<Match> getMatches() {
return matches;
}
public void setMatches(List<Match> matches) {
this.matches = matches;
}
}
HomeTeam.java
//HomeTeam
public class HomeTeam {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("name")
#Expose
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Score.java
//Score
public class Score {
#SerializedName("winner")
#Expose
private String winner;
#SerializedName("duration")
#Expose
private String duration;
public String getWinner() {
return winner;
}
public void setWinner(String winner) {
this.winner = winner;
}
public String getDuration() {
return duration;
}
public void setDuration(String duration) {
this.duration = duration;
}
}
Edit:
#Override
public void onBindViewHolder(ListaPartidosAdapter.ViewHolder holder, int position) {
Partido p = dataset.get(position);
HomeTeam homeTeam = p.getHomeTeam();
String nameHomeTeam = homeTeam.getName();
}
And tool convert json to java code: http://www.jsonschema2pojo.org/

try
public class Puntaje {
public String winner;
public String duration;
}

It's seems like you've problems with your models. Use this link to convert your json to java object.

Retrofit Doesnt show nested arraylists

I am trying to download data from the url ( JSON ) =
https://d17h27t6h515a5.cloudfront.net/topher/2017/May/59121517_baking/baking.json
for the networking i have used retrofit, and these are my classes, whenever i try to access the nested classes or lists, it throws a fatal error.
MainActivity
public class MainActivity extends AppCompatActivity {
ArrayList<Recipe> mRecipies = new ArrayList<>();
public TextView text;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text = (TextView)findViewById(R.id.text);
IRecipe iRecipe = RetrofitBuilder.Retrieve();
Call<ArrayList<Recipe>> recipe = iRecipe.getRecipe();
recipe.enqueue(new Callback<ArrayList<Recipe>>() {
#Override
public void onResponse(Call<ArrayList<Recipe>> call, Response<ArrayList<Recipe>> response) {
mRecipies = response.body();
text.setText(mRecipies.get(3).getIngredients().size());
}
#Override
public void onFailure(Call<ArrayList<Recipe>> call, Throwable t) {
}
});
MyRecipe class
public class Recipe {
private String id;
private String name;
private List<Ingredients> ingredients = new ArrayList<>();
private List<Steps> steps = new ArrayList<>();
private String servings;
public Recipe(String id, String name, String servings, List<Ingredients> ingredients, List<Steps> steps) {
this.id = id;
this.name = name;
this.ingredients = ingredients;
this.steps = steps;
this.servings = servings;
}
public Recipe(){
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<Ingredients> getIngredients() {
return ingredients;
}
public void setIngredients(List<Ingredients> ingredients) {
this.ingredients = ingredients;
}
public List<Steps> getSteps() {
return steps;
}
public void setSteps(List<Steps> steps) {
this.steps = steps;
}
public String getServings() {
return servings;
}
public void setServings(String servings) {
this.servings = servings;
}
}
My ingredients class
public class Ingredients {
private String quantity;
private String measure;
private String ingredient;
public Ingredients(String quantity, String measure, String ingredient) {
this.quantity = quantity;
this.measure = measure;
this.ingredient = ingredient;
}
public Ingredients(){
}
public String getQuantity() {
return quantity;
}
public void setQuantity(String quantity) {
this.quantity = quantity;
}
public String getMeasure() {
return measure;
}
public void setMeasure(String measure) {
this.measure = measure;
}
public String getIngredient() {
return ingredient;
}
public void setIngredient(String ingredient) {
this.ingredient = ingredient;
}
}
Retrofit classes
Builder
public final class RetrofitBuilder {
static IRecipe iRecipe;
public static IRecipe Retrieve() {
Gson gson = new GsonBuilder().create();
OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
iRecipe = new Retrofit.Builder()
.baseUrl("https://d17h27t6h515a5.cloudfront.net/topher/2017/May/59121517_baking/")
.addConverterFactory(GsonConverterFactory.create(gson))
.callFactory(httpClientBuilder.build())
.build().create(IRecipe.class);
return iRecipe;
}
}
Interface
public interface IRecipe {
#GET("baking.json")
Call<ArrayList<Recipe>> getRecipe();
}
Stack Trace
FATAL EXCEPTION: main
Process: com.example.vamshi.retrofittrial, PID: 20350
android.content.res.Resources$NotFoundException: String resource ID #0x9
at android.content.res.Resources.getText(Resources.java:328)
at android.content.res.MiuiResources.getText(MiuiResources.java:123)
at android.widget.TextView.setText(TextView.java:4432)
at com.example.vamshi.retrofittrial.MainActivity$1.onResponse(MainActivity.java:34)
at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:70)
at android.os.Handler.handleCallback(Handler.java:742)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:5527)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
07-08 19:07:00.145 20350-20350/com.example.vamshi.retrofittrial E/MQSEventManagerDelegate: failed to get MQSService.

Well, setText doesnt allow integers.
So instead of
text.setText(mRecipies.get(3).getIngredients().size());
use
text.setText(String.valueof(mRecipies.get(3).getIngredients().size()));

Can not deserialize instance of java.util.HashSet

this is my first post and I'm newbie in firebase, sorry if i'm doing some stupid question. Hope you can help me.
This is my bean:
public class Fornecedor implements Comparable{
private int id;
private String nome;
private String email;
private int logo;
private Set<Produto> produtos;
private Set<Representante> representantes;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public int getLogo() {
return logo;
}
public void setLogo(int logo) {
this.logo = logo;
}
public Set<Produto> getProdutos() {
return produtos;
}
public void setProdutos(HashSet<Produto> produtos) {
this.produtos = produtos;
}
public Set<Representante> getRepresentantes() {
return representantes;
}
public void setRepresentantes(HashSet<Representante> representantes) {
this.representantes = representantes;
}
}
This is my firebase data structure:
{
"fornecedores" : {
"avon" : {
"email" : "contato#avon.com.br",
"logo" : "avon.jpg",
"nome" : "Avon Cosméticos",
"produtos" : {
"cremex" : true,
"perfumex" : true
},
"representantes" : {
"jao" : true,
"ze" : true
}
},
... other nodes like above ...
}
}
This is what I'm trying to do:
Firebase ref = new Firebase("https://nasuakz.firebaseio.com/fornecedores");
ref.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot snapshot) {
System.out.println("Tem " + snapshot.getChildrenCount() + " fornecedores");
for (DataSnapshot fornecedorSnapshot : snapshot.getChildren()) {
Fornecedor fornecedor = fornecedorSnapshot.getValue(Fornecedor.class);
System.out.println(fornecedor.getNome() + " - " + fornecedor.getEmail());
}
}
}
and this is the error that happens on line 7 of above code:
Can not deserialize instance of java.util.HashSet
i know that is something wrong with mapping the json to my bean, but this works when i use parcelable, so i'm not understanding why this happen.

Your produtos and representantes are not sets, but maps. They map a String key to a Boolean value.
So you need to provide the proper mapping for them:
public class Fornecedor implements Comparable{
private int id;
private String nome;
private String email;
private int logo;
private Map<String, Boolean> produtos;
private Map<String, Boolean> representantes;
public int getId() { return id; }
public void setId(int id) { this.id = id; }
public String getNome() { return nome; }
public void setNome(String nome) { this.nome = nome; }
public String getEmail() { return email; }
public void setEmail(String email) { this.email = email; }
public int getLogo() { return logo; }
public void setLogo(int logo) { this.logo = logo; }
public Map<String, Boolean> getProdutos() { return produtos; }
public Map<String, Boolean> getRepresentantes() { return representantes; }
}
You can of course add helper methods to look up the correct Produto and Representante objects. Just be sure to mark then as #JsonIgnore, so that Jackson doesn't try to serialize them.