I am making an Android application which reads several JSON files and inserts the read information into tables in my database.
For instance, there are three files:

1. countries.json

   {
       "countries": [
           {
               "name": "United States",
               "org_ids": [
                   {
                       "id": 1
                   },
                   {
                       "id": 2
                   },
                   {
                       "id": 3
                   }
               ]
           },
           {
               "name": "China",
               "org_ids": [
                   {
                       "id": 1
                   },
                   {
                       "id": 2
                   }
               ]
           },
           {
               "name": "Hong Kong",
               "org_ids": [
                   {
                       "id": 3
                   },
                   {
                       "id": 4
                   },
                   {
                       "id": 5
                   }
               ]
           }
       ]
   }
   

2. orgs.json

   {
       "orgs": [
           {
               "id": 1,
               "name": "UNO"
           },
           {
               "id": 2,
               "name": "Organization of American States"
           },
           {
               "id": 3,
               "name": "INTERPOL"
           },
           {
               "id": 4,
               "name": "European Union"
           },
           {
               "id": 5,
               "name": "The Commonwealth of Nations"
           }
       ]
   }
   

3. continents.json

   {
       "continents": [
           {
               "id": 1,
               "name": "Africa"
           },
           {
               "id": 2,
               "name": "North America"
           },
           {
               "id": 3,
               "name": "South America"
           },
           {
               "id": 4,
               "name": "Asia"
           },
           {
               "id": 5,
               "name": "Europe"
           },
           {
               "id": 6,
               "name": "Australia"
           }
       ]
   }
   

Please don’t pay attention to the contents of my JSONs, they don’t contain real members of the listed international organizations. It’s just an example.

I see two ways.

THE FORMER WAY.

Store each country with its data to a class instance and define a SparseArray contains a country ID as a key and a CountryInfo object as a value.

/** Each item contains country's ID (key) and respective data (value) */
    private SparseArray<CountryInfo> mCountriesInfo = new SparseArray<JsonParser.CountryInfo>();

After reading everything from the files, the data from the SparseArray will be inserted into the database.

    private class CountryInfo {

    String mCountryName;
    int continentId;
    String mContinentName;
    /** Contains IDs (keys) and names (values) of organizations */
    SparseArray<String> mOrgNames = new SparseArray<String>();

}

Drawbacks.

• The more JSONS (or the more complex JSONs) the more complex the class
  for storing.
• Data duplication.

Benefits

• Reading and inserting does not depend on each other.

THE LATTER WAY.

Read and insert without preliminary saving.

Drawbacks.

• Database logic and reading logic are mixed.

Benefits.

• No any additional classes.
• No data duplication.

Which way is a better practice?