org.openvoters.android.tasks.RemoteAPIGetListTask.java Source code

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Here is the source code for org.openvoters.android.tasks.RemoteAPIGetListTask.java

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/*
 *   This file is part of OpenVoters, the open library for mobile voting.
 *
 *   OpenVoters is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   OpenVoters is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with OpenVoters.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package org.openvoters.android.tasks;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.json.JSONException;
import org.json.JSONObject;
import org.openvoters.android.data.Item;
import org.openvoters.android.remote.RemoteAPI;
import org.openvoters.android.remote.callback.RemoteAPIGetListCallback;

import android.graphics.Bitmap;
import android.net.http.AndroidHttpClient;
import android.os.AsyncTask;

public class RemoteAPIGetListTask extends AsyncTask<RemoteAPIGetListCallback, Void, JSONObject> {

    RemoteAPIGetListCallback callback;
    List<Bitmap> images = new ArrayList<Bitmap>();
    List<String> names = new ArrayList<String>();
    List<Item> items = new ArrayList<Item>();

    boolean taskError = false;
    Exception exc;

    @Override
    protected JSONObject doInBackground(RemoteAPIGetListCallback... params) {
        if (params.length > 0) {
            callback = params[0];
        }

        JSONObject result = null;
        AndroidHttpClient httpClient = AndroidHttpClient.newInstance("");

        try {
            HttpGet request = new HttpGet(String.format("%s/%s", RemoteAPI.getBaseURL(), "getlist"));
            HttpResponse response = httpClient.execute(request);

            InputStream input = response.getEntity().getContent();
            java.util.Scanner s = new java.util.Scanner(input).useDelimiter("\\A");
            String responseString = s.hasNext() ? s.next() : "";

            JSONObject obj = new JSONObject(responseString);
            httpClient.close();
            result = obj;
        } catch (Exception e) {
            httpClient.close();
            taskError = true;
            exc = e;
            return null;
        }

        httpClient.close();

        elabora(result);
        return result;
    }

    private void elabora(JSONObject result) {
        JSONObject piece = null;
        int i = 0;

        try {
            while (true) {
                boolean error = false;
                try {
                    piece = result.getJSONObject(String.format("c%d", i++));
                } catch (JSONException e) {
                    error = true;
                }

                if (!error) {
                    items.add(new Item(piece));
                } else {
                    break;
                }
            }
        } catch (Exception e) {
            taskError = true;
            exc = e;
            return;
        }
    }

    protected void onPostExecute(JSONObject result) {
        if (callback != null)
            if (!taskError) {
                callback.onSuccess(items);
            } else {
                callback.onError(exc);
            }
    }

}