GsonChallongeTest.java

package com.example;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.util.List;

/**
 * Created by dmta on 18.11.15.
 */
public class GsonChallongeTest {

    private static final String JSON = "[\n" +
            "  {\n" +
            "    \"participant\": {\n" +
            "      \"active\": true,\n" +
            "      \"checked_in_at\": null,\n" +
            "      \"created_at\": \"2015-01-19T16:54:40-05:00\",\n" +
            "      \"final_rank\": null,\n" +
            "      \"group_id\": null,\n" +
            "      \"icon\": null,\n" +
            "      \"id\": 16543993,\n" +
            "      \"invitation_id\": null,\n" +
            "      \"invite_email\": null,\n" +
            "      \"misc\": null,\n" +
            "      \"name\": \"Participant #1\",\n" +
            "      \"on_waiting_list\": false,\n" +
            "      \"seed\": 1,\n" +
            "      \"tournament_id\": 1086875,\n" +
            "      \"updated_at\": \"2015-01-19T16:54:40-05:00\",\n" +
            "      \"challonge_username\": null,\n" +
            "      \"challonge_email_address_verified\": null,\n" +
            "      \"removable\": true,\n" +
            "      \"participatable_or_invitation_attached\": false,\n" +
            "      \"confirm_remove\": true,\n" +
            "      \"invitation_pending\": false,\n" +
            "      \"display_name_with_invitation_email_address\": \"Participant #1\",\n" +
            "      \"email_hash\": null,\n" +
            "      \"username\": null,\n" +
            "      \"attached_participatable_portrait_url\": null,\n" +
            "      \"can_check_in\": false,\n" +
            "      \"checked_in\": false,\n" +
            "      \"reactivatable\": false\n" +
            "    }\n" +
            "  },\n" +
            "  {\n" +
            "    \"participant\": {\n" +
            "      \"active\": true,\n" +
            "      \"checked_in_at\": null,\n" +
            "      \"created_at\": \"2015-01-19T16:54:43-05:00\",\n" +
            "      \"final_rank\": null,\n" +
            "      \"group_id\": null,\n" +
            "      \"icon\": null,\n" +
            "      \"id\": 16543994,\n" +
            "      \"invitation_id\": null,\n" +
            "      \"invite_email\": null,\n" +
            "      \"misc\": null,\n" +
            "      \"name\": \"Participant #2\",\n" +
            "      \"on_waiting_list\": false,\n" +
            "      \"seed\": 2,\n" +
            "      \"tournament_id\": 1086875,\n" +
            "      \"updated_at\": \"2015-01-19T16:54:43-05:00\",\n" +
            "      \"challonge_username\": null,\n" +
            "      \"challonge_email_address_verified\": null,\n" +
            "      \"removable\": true,\n" +
            "      \"participatable_or_invitation_attached\": false,\n" +
            "      \"confirm_remove\": true,\n" +
            "      \"invitation_pending\": false,\n" +
            "      \"display_name_with_invitation_email_address\": \"Participant #2\",\n" +
            "      \"email_hash\": null,\n" +
            "      \"username\": null,\n" +
            "      \"attached_participatable_portrait_url\": null,\n" +
            "      \"can_check_in\": false,\n" +
            "      \"checked_in\": false,\n" +
            "      \"reactivatable\": false\n" +
            "    }\n" +
            "  },\n" +
            "  {\n" +
            "    \"participant\": {\n" +
            "      \"active\": true,\n" +
            "      \"checked_in_at\": null,\n" +
            "      \"created_at\": \"2015-01-19T16:57:10-05:00\",\n" +
            "      \"final_rank\": null,\n" +
            "      \"group_id\": null,\n" +
            "      \"icon\": null,\n" +
            "      \"id\": 16543996,\n" +
            "      \"invitation_id\": null,\n" +
            "      \"invite_email\": null,\n" +
            "      \"misc\": null,\n" +
            "      \"name\": \"Participant #3\",\n" +
            "      \"on_waiting_list\": false,\n" +
            "      \"seed\": 3,\n" +
            "      \"tournament_id\": 1086875,\n" +
            "      \"updated_at\": \"2015-01-19T16:57:10-05:00\",\n" +
            "      \"challonge_username\": null,\n" +
            "      \"challonge_email_address_verified\": null,\n" +
            "      \"removable\": true,\n" +
            "      \"participatable_or_invitation_attached\": false,\n" +
            "      \"confirm_remove\": true,\n" +
            "      \"invitation_pending\": false,\n" +
            "      \"display_name_with_invitation_email_address\": \"Participant #3\",\n" +
            "      \"email_hash\": null,\n" +
            "      \"username\": null,\n" +
            "      \"attached_participatable_portrait_url\": null,\n" +
            "      \"can_check_in\": false,\n" +
            "      \"checked_in\": false,\n" +
            "      \"reactivatable\": false\n" +
            "    }\n" +
            "  },\n" +
            "  {\n" +
            "    \"participant\": {\n" +
            "      \"active\": true,\n" +
            "      \"checked_in_at\": null,\n" +
            "      \"created_at\": \"2015-01-19T16:57:12-05:00\",\n" +
            "      \"final_rank\": null,\n" +
            "      \"group_id\": null,\n" +
            "      \"icon\": null,\n" +
            "      \"id\": 16543997,\n" +
            "      \"invitation_id\": null,\n" +
            "      \"invite_email\": null,\n" +
            "      \"misc\": null,\n" +
            "      \"name\": \"Participant #4\",\n" +
            "      \"on_waiting_list\": false,\n" +
            "      \"seed\": 4,\n" +
            "      \"tournament_id\": 1086875,\n" +
            "      \"updated_at\": \"2015-01-19T16:57:12-05:00\",\n" +
            "      \"challonge_username\": null,\n" +
            "      \"challonge_email_address_verified\": null,\n" +
            "      \"removable\": true,\n" +
            "      \"participatable_or_invitation_attached\": false,\n" +
            "      \"confirm_remove\": true,\n" +
            "      \"invitation_pending\": false,\n" +
            "      \"display_name_with_invitation_email_address\": \"Participant #4\",\n" +
            "      \"email_hash\": null,\n" +
            "      \"username\": null,\n" +
            "      \"attached_participatable_portrait_url\": null,\n" +
            "      \"can_check_in\": false,\n" +
            "      \"checked_in\": false,\n" +
            "      \"reactivatable\": false\n" +
            "    }\n" +
            "  }\n" +
            "]";

    public static void main(String[] args) {
        List<ParticipantWrapper> list = new Gson().fromJson(JSON, new TypeToken<List<ParticipantWrapper>>() {
        }.getType());

        System.out.println(list);

        // prints:
        // ParticipantWrapper{participant=Participant{id='16543993', name='Participant #1'}}, ParticipantWrapper{participant=Participant{id='16543994', name='Participant #2'}}, ParticipantWrapper{participant=Participant{id='16543996', name='Participant #3'}}, ParticipantWrapper{participant=Participant{id='16543997', name='Participant #4'}}]
    }

    public static class Participant {

        private String id;
        private String name;

        public String getPlayerId() {
            return id;
        }

        public String getPlayerName() {
            return name;
        }

        @Override
        public String toString() {
            return "Participant{" +
                    "id='" + id + '\'' +
                    ", name='" + name + '\'' +
                    '}';
        }
    }

    public class ParticipantWrapper {
        public final Participant participant;

        public ParticipantWrapper() {
            participant = null;
        }

        @Override
        public String toString() {
            return "ParticipantWrapper{" +
                    "participant=" + participant +
                    '}';
        }
    }
}