I have a database of type dbflow i created Organization class contains columns but I want to create from this class a new object is empty with no data So that it can store new data , I designed everything but I get the same data with each new object , Can I actually do that ?, What can I do to do this task ?
import com.raizlabs.android.dbflow.annotation.Database;
#Database(name = MyDatabase.NAME, version = MyDatabase.VERSION)
public class MyDatabase {
public static final String NAME = "MyDataBase";
public static final int VERSION = 1;
}
import com.raizlabs.android.dbflow.annotation.Column;
import com.raizlabs.android.dbflow.annotation.PrimaryKey;
import com.raizlabs.android.dbflow.annotation.Table;
import com.raizlabs.android.dbflow.structure.BaseModel;
#Table(database = MyDatabase.class)
public class Organization extends BaseModel {
#Column
#PrimaryKey
int id;
#Column
String name;
private Organization organization;
public String getName() {
return name;
}
public void setId(int id) {
this.id = id;
}
public void setOrganization(Organization organization) {
this.organization = organization;
}
public void setName(String name) {
this.name = name;
}
}
public class Person {
private String name;
private String lastName;
public Person(){
super();
}
public Person(String name, String lastName){
this.name=name;
this.lastName=lastName;
}
public String getName(){
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
public class Person {
private String name;
private String lastName;
public Person(){
super();
}
public Person(String name, String lastName){
this.name=name;
this.lastName=lastName;
}
public String getName(){
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
I have made this class in java
package mainpackage;
public class Users {
public char username;
public char name;
public char surname;
public char department;
public int usersCounter;
public char getUsername() {
return this.username;
}
public void setUsername(char username) {
this.username = username;
}
public char getSurname() {
return this.surname;
}
public void setSurname(char surname) {
this.surname = surname;
}
public char getName() {
return this.name;
}
public void setName(char name) {
this.name = name;
}
public char getDepartment() {
return this.department;
}
public void setDepartment(char department) {
this.department = department;
}
public int getUsersCounter() {
return this.usersCounter;
}
public void setUsersCounter(int usersCounter) {
this.usersCounter = usersCounter;
}
public Users(char userName, char Name, char surName, char Department, int UsersCounter) {
username = userName;
name = Name;
surname= surName;
department = Department;
usersCounter = UsersCounter;
}
}
and i also made a subclass in which I try to create the constructor of the subclass,but it shows me an error in super(which i put inside the constructor of the subclass) saying that the constructor Users is undefined.I am using Eclipse and the only solution to this problem is to create a constructor Users,but it already exists!!!
package mainpackage;
public class Students extends Users {
static int registrationNumber;
#SuppressWarnings("static-access")
public int getNumber() {
return this.registrationNumber;
}
#SuppressWarnings("static-access")
public void setNumber(char registrationNumber) {
this.registrationNumber = registrationNumber;
}
public Students(char userName, char Name, char surName, char Department, int UsersCounter,int RegistrationNumber) {
super(userName, Name, surName, Department, UsersCounter);
registrationNumber = RegistrationNumber;
}
}
I have to map this JSONObject into a Java object.
This is my Json:
{"WALLET":{
"ID":"1234",
"BAL":"20.000",
"NAME":"Filomena",
"EMAIL":"filo#gmail.com",
"DOCS":[
{
"ID":"001",
"S":"0",
"TYPE":"CardId",
"VD":"2019"
}
],
"IBANS":[
{
"ID":"001",
"S":"1",
"DATA":"iban",
"SWIFT":"swiftCode",
"HOLDER":"holder"
}
],
"STATUS":"string",
"BLOCKED":"1",
"SDDMANDATES":[
{
"ID":"sddMandateId",
"S":"status",
"DATA":"iban",
"SWIFT":"swiftCode"
}
],
"LWID":"string",
"CARDS":[
{
"ID":"string",
"EXTRA":{
"IS3DS":"string",
"CTRY":"string",
"AUTH":"string",
"NUM":"string",
"EXP":"string",
"TYP":"string"
}
}
],
"FirstName":"string",
"LastName":"string",
"CompanyName":"string",
"CompanyDescription":"string",
"CompanyWebsite":"string"
}
}
This is my Java class:
public class Wallet {
private String id;
private String bal;
private String name;
private String email;
private List<Doc> docs;
private List<Iban> ibans;
private String status;
private String blocked;
private List<SddMandate> sddMandates ;
private String lwid;
private List<Card> cards;
private String firstName;
private String lastname;
private String companyName;
private String companyDescription;
private String companyWebSite;
public Wallet(){
}
public Wallet(String id, String bal, String name, String email, List<Doc> docs, List<Iban> ibans, String status,
String blocked, List<SddMandate> sddMandates, String lwid, List<Card> cards, String firstName,
String lastname, String companyName, String companyDescription, String companyWebSite) {
super();
this.id = id;
this.bal = bal;
this.name = name;
this.email = email;
this.docs = docs;
this.ibans = ibans;
this.status = status;
this.blocked = blocked;
this.sddMandates = sddMandates;
this.lwid = lwid;
this.cards = cards;
this.firstName = firstName;
this.lastname = lastname;
this.companyName = companyName;
this.companyDescription = companyDescription;
this.companyWebSite = companyWebSite;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getBal() {
return bal;
}
public void setBal(String bal) {
this.bal = bal;
}
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 List<Doc> getDocs() {
return docs;
}
public void setDocs(List<Doc> docs) {
this.docs = docs;
}
public List<Iban> getIbans() {
return ibans;
}
public void setIbans(List<Iban> ibans) {
this.ibans = ibans;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getBlocked() {
return blocked;
}
public void setBlocked(String blocked) {
this.blocked = blocked;
}
public List<SddMandate> getSddMandates() {
return sddMandates;
}
public void setSddMandates(List<SddMandate> sddMandates) {
this.sddMandates = sddMandates;
}
public String getLwid() {
return lwid;
}
public void setLwid(String lwid) {
this.lwid = lwid;
}
public List<Card> getCards() {
return cards;
}
public void setCards(List<Card> cards) {
this.cards = cards;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getCompanyName() {
return companyName;
}
public void setCompanyName(String companyName) {
this.companyName = companyName;
}
public String getCompanyDescription() {
return companyDescription;
}
public void setCompanyDescription(String companyDescription) {
this.companyDescription = companyDescription;
}
public String getCompanyWebSite() {
return companyWebSite;
}
public void setCompanyWebSite(String companyWebSite) {
this.companyWebSite = companyWebSite;
}
Now i'm trying to map the object with gson library.
Wallet walletDetails=gson.fromJson(rispostaGetWalletDetails.toString(), Wallet.class);
System.out.println("Balance: "+walletDetails.getBal());
Now when i try to call method on the object i have always null and not the real value.
How i can do?
You have a wrong root level.
Probably, you need to need to get one level down
JSONObject yourObject = json.get("WALLET");
Wallet walletDetails = gson.fromJson(yourObject.toString(), Wallet.class);
To have Gson handle the correct field name mapping while deserializing, you have to register a FieldNamingStrategy like this (using Java 8):
Gson gson = new GsonBuilder()
.setFieldNamingStrategy(field -> field.getName().toUpperCase())
.create();
The strategy will convert each Java field name to match those in your JSON.
This will cover almost all your fields except for those upper-camel-cased in the JSON response, such as "LastName", "CompanyName", etc. In order to map those too, your FieldNamingStrategy will have to become a little bit smarter, like:
field -> {
String fname = field.getName();
return "firstName".equals(fname) || "companyName".equals(fname) /*etc...*/ ? capitalize(fname) : fname.toUpperCase();
}
and so on, I think you got the idea.
The capitalize() method you can find in libraries like Apache Commons Lang or write your own, it's just for examplification here.
Your object variable name doesn't match the json attribute name. "EMAIL" in json should have same EMAIL in object. To overcome this, you could mention #JsonProperty before your attribute declaraction.
for eg:
#JsonProperty("EMAIL")
private String email;
while getting values in the form the bindFromRequest().get() it returns only null value.I got all the String type is null and integr as zer0. Here is my code for controller and model packages and how I can resolve this error:
enter code here
In controller:
public static Result getShow(){
Register register=Form.form(Register.class).bindFromRequest().get();
register.save();
System.out.println(register);
return ok("#Required annotation kicked in.."+register);
}
In Models:
package models;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="register")
public class Register {
//private static final long serialVersionUID = 1L;
private String firstname;
private String lastname;
#Id
private String displayname;
private String date;
private String email;
private String password;
private String confirm_password;
private String gender;
private int phone_no;
private String address;
private int zipcode;
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getDisplayname() {
return displayname;
}
public void setDisplayname(String displayname) {
this.displayname = displayname;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getConfirm_password() {
return confirm_password;
}
public void setConfirm_password(String confirm_password) {
this.confirm_password = confirm_password;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public int getPhone_no() {
return phone_no;
}
public void setPhone__no(int phone_no) {
this.phone_no = phone_no;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getZipcode() {
return zipcode;
}
public void setZipcode(int zipcode) {
this.zipcode = zipcode;
}
}
If bindFromRequest().get() returns null, then the Form didn't validate. To debug this, log Form.form(Register.class).bindFromRequest().errors(), to see the validation errors in the Form. Beyond that no one can tell you what's wrong without seeing the Register class, and the data you're trying to bind to it.
You shouldn't be blindly calling get() on the Form and trying to save it, as this obviously can fail. At least check that it hasErrors() before trying to save it. And if it does have validation errors, you should be passing that Form back to the view to show those errors to the user.
See Handling Binding Failure in the docs.
I have the following JSON:
{
_id: "5252fdf424f1e7fbf7000004",
address: "Calle 1000",
city: "Concepción",
created_at: "2013-10-07T18:31:19.375Z",
description: "",
name: "Joctos",
phone: "94967994",
updated_at: "2013-12-09T13:03:07.328Z",
happy_hour: {
active: false,
type: 1,
all_day: false,
start: "2013-12-17T03:30:00.000Z",
end: "2013-12-17T05:00:00.000Z"
}
}
Tell them to receive and work with JSON GSON me to believe an object, the probleam is that defined the object follows
public class StoreModel {
#SerializedName("_id")
private String _id;
#SerializedName("address")
private String address;
#SerializedName("city")
private String city;
#SerializedName("created_at")
private String created_at;
#SerializedName("description")
private String description;
#SerializedName("name")
private String name;
#SerializedName("phone")
private String phone;
#SerializedName("updated_at")
private String updated_at;
public String get_id() {
return this._id;
}
public void set_id(String _id) {
this._id = _id;
}
public String getAddress() {
return this.address;
}
public void setAddress(String address) {
this.address = address;
}
public String getCity() {
return this.city;
}
public void setCity(String city) {
this.city = city;
}
public String getCreated_at() {
return this.created_at;
}
public void setCreated_at(String created_at) {
this.created_at = created_at;
}
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public String getPhone() {
return this.phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getUpdated_at() {
return this.updated_at;
}
public void setUpdated_at(String updated_at) {
this.updated_at = updated_at;
}
}
How should I define my model to get the "happy_hours" data?
StoreModel class will contain the object of happy_hours
Create a HappyHours class with appropriate attributes and add an attribute happyHours to your StoreModel :
#SerializedName("happy_hours")
private HappyHours happyHours;
For Date objects try "Date start;" and "Date end;"
If it doesn't work, you have to write an adapter :
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(Date.class, new DateGsonDeserializer());
gsonBuilder.create();
public class DateGsonDeserializer implements JsonDeserializer<Date> {
#Override
public Date deserialize(final JsonElement jsonElement, final Type type, final JsonDeserializationContext context) throws JsonParseException {
// just write the right formatter from SimpleDateFormat
return formatToDate(jsonElement.getAsString())
}
}