ca.cmput301w14t09.FileManaging.FileLoading.java Source code

Introduction

Here is the source code for ca.cmput301w14t09.FileManaging.FileLoading.java

Source

/**
    
License GPLv3: GNU GPL Version 3
<http://gnu.org/licenses/gpl.html>.
This program 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.
    
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 */

package ca.cmput301w14t09.FileManaging;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import com.google.gson.Gson;
import android.app.Activity;
import ca.cmput301w14t09.Model.User;

/**
 * 
 * @author Conner
 * FileLoading loads data stored on the device when 
 * requested by a method
 * 
 */
public class FileLoading {

    private static final String FILENAME = "Username.sav";
    protected static User user;
    protected String name;

    /**
     * loadFromFile loads in a list of usernames
     * from the device
     * @param main
     * @return
     */
    public static String[] loadFromFile(Activity main) {
        ArrayList<String> usernames = new ArrayList<String>();
        try {
            FileInputStream fis = main.openFileInput(FILENAME);
            BufferedReader in = new BufferedReader(new InputStreamReader(fis));
            String line = in.readLine();
            while (line != null) {
                usernames.add(line);
                line = in.readLine();
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return usernames.toArray(new String[usernames.size()]);
    }

    /**
     * returnUser loads a specific user and 
     * user data from the device
     * @param name
     * @param main
     * @return
     */
    public static User returnUser(String name, Activity main) {
        Gson gson = new Gson();
        try {
            FileInputStream fis = main.openFileInput(name + ".sav");
            InputStreamReader isr = new InputStreamReader(fis);
            BufferedReader buff = new BufferedReader(isr);
            String jsonOut = buff.readLine();
            user = gson.fromJson(jsonOut, User.class);
            buff.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return user;
    }
}