JSon array of arrays

Question

I'm trying to write a JSon document and its relative xsd file in order to generate JAXB classes and I don't think if I'm doing it in the right way. what I want is a structure like this:

team
   -name="name"
   -game="game"
   -intarray
      int
      int
      ...
      int
   -values
      [int1, int2]
      [int1, int2]
      ...
      [int1, int2]
   -stringarrays
      [string1, string2,...., stringn]
      [string1, string2,...., stringn]
      ...
      [string1, string2,...., stringn]

so I wrote my xsd and a example string in the json file to attempt to read it

example line:
{"name": "Team 1", "game": "game", "intarray": [1, 2, 3, 4, 5, 6], "values": [[10,20], [10,80], [10,30], [10,60], [10,50], [10,30]], "stringarrays": [["Azione", "Azione"], ["Azione", "Azione"], ["Azione", "Azione"], ["Azione", "Azione"], ["Azione", "Azione"], ["Azione", "Azione"]]}  

and this is my xsd

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"  targetNamespace="http://www.example.org/teams" xmlns:tns="http://www.example.org/teams" elementFormDefault="qualified">

<element name="team_list" type="tns:lista_team"></element>

<complexType name="team">
    <sequence>
        <element name="name" type="string"></element>
        <element name="game" type="string"></element>
        <element name="intarray" type="int" maxOccurs="unbounded"
            minOccurs="0">
        </element>
        <element name="values" type="tns:ivev"></element>
        <element name="stringarrays" type="tns:arrays"></element>
    </sequence>
</complexType>

<complexType name="ivev">
    <sequence>
        <element name="couple" type="tns:ivev_couple" maxOccurs="unbounded" minOccurs="0"></element>
    </sequence>
</complexType>

<complexType name="ivev_couple">
    <sequence>
        <element name="ivev_element" type="int" maxOccurs="unbounded" minOccurs="1"></element>
    </sequence>
</complexType>

<complexType name="moveset">
    <sequence>
        <element name="mosse" type="string" maxOccurs="unbounded" minOccurs="0"></element>
    </sequence>
</complexType>

<complexType name="arrays">
    <sequence>
        <element name="stringarray" type="tns:moveset" maxOccurs="unbounded" minOccurs="0"></element>
    </sequence>
</complexType>

<complexType name="lista_team">
    <sequence>
        <element name="squadra" type="tns:team" maxOccurs="unbounded" minOccurs="0"></element>
    </sequence>
</complexType>

eclipse keeps telling me that I have a MalformedJson, i think the problem is with the json line, i think that the xsd is almost correct, but i could be wrong :)

The code that writes the JSON document looks like this:

Gson gson = new Gson(); 
String json = gson.toJson(team); 

try 
{ 
  FileWriter gwriter = new FileWriter("c:\\file.json"); 
  gwriter.write(json); 
  gwriter.close(); 
}
catch(Exception e)
{ 
} 

Which produces this JSON document:

{
  "nome":"team1",
  "game":"game",
  "intarray":[1,2],
  "arrayofintarrays":{
    "couple":[]
  },
  ‌​"arrayofstringarrays":{
    "mossearray":[]
  }
}

This JSON document is then read with like this:

Team[] teams_loaded= null; 

try
{ 
  Reader reader = new InputStreamReader(DexLoader.class.getClassLoader().getResourceAsStream("teams.tx‌​t")); 
  Gson gson = new GsonBuilder().create(); 
  JsonReader read = new JsonReader(reader); 
  teams_loaded = gson.fromJson(read, Team[].class); 
}
catch(Exception c)
{ 
  c.printStackTrace(); 
}

thanks!

Answer 1

You are writing a single instance of Team and then trying to read it as an array of Team. Your read code should be:

Team team = gson.fromJson(read, Team.class); 

Answer 2

It seems that working with array JSON elements is a little tricky in GSON. Instead of reading your file as given like this

Team[] teams_loaded= null    
teams_loaded = gson.fromJson(read, Team[].class)

try to read an Array of teams as given below.

 @Test
    public void testSampleGSON() {
        String sample = "[{\"name\":\"Sharath\",\"age\":\"24\"},{\"name\":\"Sharath\",\"age\":\"24\"},{\"name\":\"Sharath\",\"age\":\"24\"},]";
        System.out.println(sample);

        Gson gson = new Gson();
        Type t = new TypeToken<Person[]>() {
        }.getType();
        Person[] pl = gson.fromJson(sample, t);
        System.out.println(pl);

        for (int i = 0; i < pl.length; i++) {
            System.out.println(pl[i]);
        }
        String jsonString = gson.toJson(pl);
        System.out.println(jsonString);
    }

Class Person is a Public Class in the same package as given below.

public class Person {
    String name;
    String age;

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return this.name;
    }

    public String getAge() {
        return this.age;
    }

    public void setAge(String age) {
        this.age = age;
    }

Hope this helps.

    public String toString() {
        return "Name : " + name + " Age : " + age;
    }
}