Local Android Database

RZDBManager.java

package com.example.rayan.mydb;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

import com.example.rayan.mydb.MyClasses.*;

import java.util.ArrayList;

public class RZDatabaseManager {
	// the Activity or Application that is creating an object from this class.
	Context context;

	// a reference to the database used by this application/object
	public SQLiteDatabase db;

	// These constants are specific to the database. They should be
	// changed to suit your needs.
	private final String DB_NAME = "RZ_DB";
	private final int DB_VERSION = 01;

	private String[] user_fields = new String[] { "_id", "name", "username",
			"password", "is_admin" };
	private final String TABLE_USER = "user";

	private String[] test_fields = new String[] { "_id", "test_name",
			"type_id", "max_score", "level", "chapter_id" };
	private final String TABLE_TEST = "test";

	private String[] chapter_fields = new String[] { "_id", "name", "body" };
	private final String TABLE_CHAPTER = "chapter";

	private String[] question_fields = new String[] { "_id", "body", "test_id" };
	private final String TABLE_QUESTION = "question";

	private String[] options_fields = new String[] { "_id", "body",
			"question_id", "is_correct" };
	private final String TABLE_OPTIONS = "options";

	private String[] test_type_fields = new String[] { "_id", "type" };
	private final String TABLE_TEST_TYPE = "test_type";

	private String[] test_taker_fields = new String[] { "_id", "student_id",
			"test_id", "date", "score" };
	private final String TABLE_TEST_TAKER = "test_taker";

	public RZDatabaseManager(Context context) {
		this.context = context;

		// create or open the database
		CustomSQLiteOpenHelper helper = new CustomSQLiteOpenHelper(context);
		this.db = helper.getWritableDatabase();

	}
	/**
	 * @author Rayan Zahab
	 * @param db
	 *            handler
	 * @param tableName
	 *            table to create
	 * @param fields
	 *            fields of the table
	 */
	public void createTable(SQLiteDatabase db, String tableName, String[] fields) {
		String query = "create table " + tableName + " (";
		for (int position = 0; position < fields.length; position++) {
			String field = fields[position];
			if (position == 0) {
				query = query + field
						+ " integer primary key autoincrement not null, ";
			} else if (position != fields.length - 1) {
				query = query + field + " text,";
			} else {
				query = query + field + " text" + ");";
			}
		}
		db.execSQL(query);
	}

	private class CustomSQLiteOpenHelper extends SQLiteOpenHelper {
		public CustomSQLiteOpenHelper(Context context) {
			super(context, DB_NAME, null, DB_VERSION);
		}

		@Override
		public void onCreate(SQLiteDatabase db) {
			createTable(db, TABLE_USER, user_fields);
			createTable(db, TABLE_QUESTION, question_fields);
			createTable(db, TABLE_OPTIONS, options_fields);
			createTable(db, TABLE_CHAPTER, chapter_fields);
			createTable(db, TABLE_TEST, test_fields);
			createTable(db, TABLE_TEST_TYPE, test_type_fields);
			createTable(db, TABLE_TEST_TAKER, test_taker_fields);

		}

		@Override
		public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		}
	}

	public void createAdmin() {
		String name = "Admin";
		String username = "admin";
		String pass = "admin";
		String pass2 = "admin";
		User u = new User(name, username, pass, pass2);
		u.setAdmin(true);

		insertRow(u);

	}

	/**
	 * This function 	s rows: It knws to which table to save according to
	 * the type of the class sent
	 * 
	 * @author Rayan Zahab <[email protected]>
	 */
	public int insertRow(Object o) {

		String[] fields = new String[] {};
		String[] values = new String[] {};
		String tableName = "";
		String cl_name = o.getClass().getSimpleName();
		if (cl_name.equals("User")) {
			fields = user_fields;
			tableName = TABLE_USER;
			User u = (User) o;
			values = new String[] { u.getName(), u.getUsername(),
					u.getPassword(), String.valueOf(u.isAdmin()) };
		} 
		
		else if (cl_name.equals("Chapter")) {
			fields = chapter_fields;
			tableName = TABLE_CHAPTER;
			Chapter c = (Chapter) o;
			values = new String[] { c.getName(), c.getBody() };
		} 
		
		else if (cl_name.equals("TestType")) {
			fields = test_type_fields;
			tableName = TABLE_TEST_TYPE;
			TestType c = (TestType) o;
			values = new String[] { c.getType() };
		} 
		
		else if (cl_name.equals("Test")) {
			fields = test_fields;
			tableName = TABLE_TEST;
			Test c = (Test) o;
			values = new String[] { "" + c.getName(), "" + c.getType_id(),
					"" + c.getMaxScore(), "" + c.getLevel(),
					"" + c.getChapter_id() };
		}
		
		else if (cl_name.equals("Question")) {
			fields = question_fields;
			tableName = TABLE_QUESTION;
			Question c = (Question) o;
			values = new String[] { c.getBody(), "" + c.getTest_id() };
		} 
		
		else if (cl_name.equals("Option")) {
			fields = options_fields;
			tableName = TABLE_OPTIONS;
			Option c = (Option) o;
			values = new String[] { c.getBody(), c.getQuestion_id() + "",
					new Boolean(c.isCorrect()).toString() };
		}
		else if (cl_name.equals("TestTaker")) {
			fields = test_taker_fields;
			tableName = TABLE_TEST_TAKER;
			TestTaker c = (TestTaker) o;
			
			values = new String[] { c.getUser_id()+"", c.getTest_id() + "",c.getDate()+ "",c.getScore() + ""};
		
		}
		ContentValues content = new ContentValues();
		for (int position = 1; position < fields.length; position++) {
			String field = fields[position];
			String value = values[position - 1];
			content.put(field, value);
		}				
		try {
			return (int) db.insert(tableName, null, content);
		} catch (Exception e) {
			Log.e("DB ERROR", e.toString());
			e.printStackTrace();
		}
		return 0;
	}

	/**
	 * UPDATING A ROW IN THE DATABASE TABLE
	 * 
	 * @author Rayan Zahab & andreh abboud
	 * @param o
	 */
	public void deleteRow(Object o) {
		String tableName = "";
		int id = 0;
		String cl_name = o.getClass().getSimpleName();
		/*
		 * if (cl_name.equals("User")) { tableName = "user"; User u = (User) o;
		 * id = u.getID(); try { db.delete(TABLE_RESERVATION, " user =" + id,
		 * null); } catch (Exception e) { Log.e("DB ERROR", e.toString());
		 * e.printStackTrace(); } } else if (cl_name.equals("Room")) { tableName
		 * = TABLE_ROOM; Room r = (Room) o; id = r.getId(); try {
		 * db.delete(TABLE_RESERVATION, " room =" + id, null); } catch
		 * (Exception e) { Log.e("DB ERROR", e.toString()); e.printStackTrace();
		 * } } else if (cl_name.equals("Reservation")) { tableName =
		 * TABLE_RESERVATION; Reservation res = (Reservation) o; id =
		 * res.getId(); }
		 */
		// ask the database manager to delete the row of given id
		try {
			db.delete(tableName, " _id =" + id, null);
		} catch (Exception e) {
			Log.e("DB ERROR", e.toString());
			e.printStackTrace();
		}
	}

	/**
	 * UPDATING A ROW IN THE DATABASE TABLE
	 * 
	 * @author Rayan Zahab
	 * @param o
	 *            to edit having the old id, and new values
	 */
	public void updateRow(Object o) {
		String[] fields = new String[] {};
		String[] values = new String[] {};
		String tableName = "";
		int id = 0;
		String cl_name = o.getClass().getSimpleName();
		/*
		 * if (cl_name.equals("User")) { fields = user_fields; tableName =
		 * "user"; User u = (User) o; id = u.getID(); values = new String[] {
		 * u.getFullName(), u.getEmail(), u.getCompany(), u.getPhoneNumber(),
		 * u.getPassword(), u.getIsAdmin() }; } else if (cl_name.equals("Room"))
		 * { fields = room_fields; tableName = "room"; Room r = (Room) o; id =
		 * r.getId(); values = new String[] { r.getName(), r.getAddress(),
		 * r.getCapacity(), r.getDescription() }; } else if
		 * (cl_name.equals("Reservation")) { fields = reservation_fields;
		 * tableName = "reservation"; Reservation res = (Reservation) o; Date
		 * date = res.getDate(); String date_str = date.toString(); values = new
		 * String[] { date_str, res.getFrom(), res.getTo(), "" +
		 * res.getRoomId(), "" + res.getUserId() }; }
		 */
		ContentValues content = new ContentValues();
		for (int position = 1; position < fields.length; position++) {
			String field = fields[position];
			String value = values[position - 1];
			content.put(field, value);
		}
		// ask the database object to update the database row of given rowID
		try {
			db.update(tableName, content, "_id" + "=" + id, null);
		} catch (Exception e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
	}

	/**
	 * @author Rayan Zahab RETRIEVING A ROW FROM A DATABASE TABLE
	 * @param rowID
	 *            : the id of the row to retrieve, tableName :the table from
	 *            which to get the row, fields : the fields of the table
	 * @return an array containing the data from the row
	 */
	public ArrayList<Object> getRowAsArray(long rowID, String tableName,
			String[] fields) {
		ArrayList<Object> rowArray = new ArrayList<Object>();
		Cursor cursor;
		try {
			cursor = db.query(tableName, fields, fields[0] + "=" + rowID, null,
					null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				do {
					for (int position = 0; position < fields.length; position++) {
						rowArray.add(cursor.getString(position));
					}
				} while (cursor.moveToNext());
			}
			cursor.close();
		} catch (SQLException e) {
			Log.e("DB ERROR", e.toString());
			e.printStackTrace();
		}
		return rowArray;
	}
   //andreh abboud
	/**
	 * 
	 * Check if the login info are right to allow login
	 * 
	 * @author Rayan Zahab andreh abboud
	 * @param user
	 * @return
	 */
	public User getRowAsArrayForLogin(User user) {
		String[] fields = user_fields;
		String tableName = "user";
		ArrayList<String> rowArray = new ArrayList<String>();
		User userReturn = null;
		Cursor cursor;
		try {
			cursor = db.query(tableName, fields, fields[2] + " LIKE " + "'"
					+ user.getUsername() + "' AND " + fields[3] + " LIKE "
					+ "'" + user.getPassword() + "'", null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				userReturn = new User();
				do {
					for (int position = 0; position < fields.length; position++) {
						rowArray.add(cursor.getString(position));

					}
				} while (cursor.moveToNext());
				userReturn.setId(Integer.parseInt(rowArray.get(0)));
				userReturn.setName(rowArray.get(1));
				userReturn.setUsername(rowArray.get(2));
				userReturn.setAdmin(Boolean.parseBoolean(rowArray.get(4)));
				userReturn.setPassword(rowArray.get(3));
			}
			cursor.close();
		} catch (SQLException e) {
			Log.e("DB ERROR", e.toString());
			e.printStackTrace();
		}

		return userReturn;
	}

	/**
	 * 
	 * Get rows having param=passed value in the paased table
	 * 
	 * @author Rayan Zahab
	 * @param param
	 *            : the position of the attribute to companre in the table
	 *            fields
	 * @param tableName
	 * @param value
	 *            is the value to search for
	 * @return
	 */
	public ArrayList<ArrayList<Object>> getRowAsArrayByPosition(int param,
			String tableName, String value) {
		String[] fields = user_fields;
		/*
		 * if (tableName.equals("User")) { fields = user_fields;
		 * 
		 * } else if (tableName.equals("Room")) { fields = room_fields; } else
		 * if (tableName.equals("Reservation")) { fields = reservation_fields; }
		 */
		ArrayList<ArrayList<Object>> dataArrays = new ArrayList<ArrayList<Object>>();
		Cursor cursor;
		try {
			cursor = db.query(tableName, fields, fields[param] + " LIKE '"
					+ value + "'", null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				do {
					ArrayList<Object> dataList = new ArrayList<Object>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}
					dataArrays.add(dataList);
				} while (cursor.moveToNext());
			}
			cursor.close();
		} catch (SQLException e) {
			Log.e("DB ERROR", e.toString());
			e.printStackTrace();
		}
		return dataArrays;
	}

	/**
	 * 
	 * Get attribute at position ATT having attribute at position param in
	 * tableName
	 * 
	 * @author Rayan Zahab
	 * @param param
	 *            : the position of the attribute to companre in the table
	 *            fields
	 * @param param
	 *            : the position of the attribute to get it value
	 * @param tableName
	 * @param value
	 *            is the value to search for
	 * @return
	 */
	public String getValueByParam(String tableName, int att, int param,
			String value) {
		String[] fields = user_fields;

		if (tableName.equals("User")) {
			fields = user_fields;
			tableName = TABLE_USER;
		} else if (tableName.equals("TestType")) {
			fields = test_type_fields;
			tableName = TABLE_TEST_TYPE;
		} else if (tableName.equals("Chapter")) {
			fields = chapter_fields;
			tableName = TABLE_CHAPTER;
		} else if (tableName.equals("Test")) {
			fields = test_fields;
			tableName = TABLE_TEST;
		} else if (tableName.equals("Question")) {
			fields = question_fields;
			tableName = TABLE_QUESTION;
		} else if (tableName.equals("Option")) {
			fields = options_fields;
			tableName = TABLE_OPTIONS;
		}
		Cursor cursor;
		String toReturn = "";
		try {
			cursor = db.query(tableName, fields, fields[param] + " LIKE '"
					+ value + "'", null, null, null, null);
			cursor.moveToFirst();

			if (!cursor.isAfterLast()) {
				do {
					toReturn = cursor.getString(att);
					cursor.close();
					return toReturn;
				} while (cursor.moveToNext());
			}

			cursor.close();
		} catch (SQLException e) {
			Log.e("DB ERROR", e.toString());
			e.printStackTrace();
		}
		return toReturn;
	}
	public String getValueByTParam(String tableName, int att, int param1, int param2,
			String value1,String value2) {
		String[] fields = user_fields;

		if (tableName.equals("User")) {
			fields = user_fields;
			tableName = TABLE_USER;
		} else if (tableName.equals("TestType")) {
			fields = test_type_fields;
			tableName = TABLE_TEST_TYPE;
		} else if (tableName.equals("Chapter")) {
			fields = chapter_fields;
			tableName = TABLE_CHAPTER;
		} else if (tableName.equals("Test")) {
			fields = test_fields;
			tableName = TABLE_TEST;
		} else if (tableName.equals("Question")) {
			fields = question_fields;
			tableName = TABLE_QUESTION;
		} else if (tableName.equals("Option")) {
			fields = options_fields;
			tableName = TABLE_OPTIONS;
		}
		Cursor cursor;
		String toReturn = "";
		try {
			cursor = db.query(tableName, fields, fields[param1] + " LIKE '"
					+ value1 + "' AND "+fields[param2]+" LIKE '"+value2+"'", null, null, null, null);
			
			cursor.moveToFirst();

			if (!cursor.isAfterLast()) {
				do {
					toReturn = cursor.getString(att);
					cursor.close();
					return toReturn;
				} while (cursor.moveToNext());
			}

			cursor.close();
		} catch (SQLException e) {
			Log.e("DB ERROR", e.toString());
			e.printStackTrace();
		}
		return toReturn;
	}

	/**
	 * Checks if a username (email) already exists in the db
	 * 
	 * @author Rayan Zahab
	 *            table fields
	 * @return
	 */
	public ArrayList<String> getRowAsArrayByUser(Object u) {
		ArrayList<String> rowArray = new ArrayList<String>();
		Cursor cursor;
		String[] fields = user_fields;
		String tableName = "user";
		String email = "";// u.getEmail();

		try {
			cursor = db.query(tableName, fields, fields[2] + " LIKE " + "'"
					+ email + "'", null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				do {
					for (int position = 0; position < fields.length; position++) {
						rowArray.add(cursor.getString(position));
					}
				} while (cursor.moveToNext());
			}
			cursor.close();
		} catch (SQLException e) {
			Log.e("DB ERROR", e.toString());
			e.printStackTrace();
		}
		return rowArray;
	}

	/**
	 * RETRIEVING ALL ROWS FROM A DATABASE TABLE
	 * 
	 * @author Rayan Zahab
	 *            the fields of the table
	 * @return an array containing the data of the table
	 * 
	 */
	// use this to list chapters!!!!
	public ArrayList<ArrayList<Object>> getTablesRowsAsArrays(Object o) {
		String tableName = "";
		String[] fields = new String[] {};
		String cl_name = o.getClass().getSimpleName();

		if (cl_name.equals("User")) {
			fields = user_fields;
			tableName = "user";
		} else if (cl_name.equals("Chapter")) {
			fields = chapter_fields;
			tableName = "chapter";
		}


		ArrayList<ArrayList<Object>> dataArrays = new ArrayList<ArrayList<Object>>();
		Cursor cursor;
		try {
			cursor = db.query(tableName, fields, null, null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				do {
					ArrayList<Object> dataList = new ArrayList<Object>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}
					dataArrays.add(dataList);
				} while (cursor.moveToNext());
			}
		} catch (SQLException e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
		return dataArrays;
	}


	public TestSet getChapterTestByType(int chapterId, int typeId) {
		String tableName = "test";
		String[] fields = test_fields;

		Cursor cursor;
		try {
			cursor = db.query(tableName, fields, fields[5] + " LIKE "
					+ chapterId + " AND " + fields[2] + " LIKE " + typeId,
					null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				
				Test testTmp = new Test();
				do {
					ArrayList<String> dataList = new ArrayList<String>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}

					testTmp.setId(Integer.parseInt(dataList.get(0)));
					testTmp.setType_id(Integer.parseInt(dataList.get(2)));
					testTmp.setMaxScore(Integer.parseInt(dataList.get(3)));
					testTmp.setLevel(Integer.parseInt(dataList.get(4)));
					testTmp.setChapter_id(Integer.parseInt(dataList.get(5)));

					TestSet setTmp = new TestSet();
					setTmp.setTest(testTmp);
					setTmp.setQuestions(getQuestions(testTmp.getId()));
					return setTmp;
				} while (cursor.moveToNext());
			}
		} catch (SQLException e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
		return null;
	}
	public ArrayList<Chapter> getChapters(int chId) {
		String tableName = "chapter";
		String[] fields = chapter_fields;
		
		ArrayList<Chapter> myReturn= new ArrayList<Chapter>();
		Cursor cursor;
		try {
			String where = "";
			if(chId!=0)
			{
				where = fields[0]+" LIKE "+chId;
			}
			cursor = db.query(tableName, fields, where,
					null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				
				do {
					Chapter chTmp= new Chapter();
					ArrayList<String> dataList = new ArrayList<String>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}

					chTmp.setId(Integer.parseInt(dataList.get(0)));
					chTmp.setName(dataList.get(1));
					chTmp.setBody(dataList.get(2));
					myReturn.add(chTmp);
				} while (cursor.moveToNext());
			}
		} catch (SQLException e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
		return myReturn;
	}

	public ArrayList<Question> getQuestions(int testId) {
		String tableName = "";
		String[] fields = new String[] {};
		ArrayList<Question> myQsts = new ArrayList<Question>();
		fields = question_fields;
		tableName = "question";
		Cursor cursor;
		try {
			cursor = db.query(tableName, fields, fields[2] + " LIKE " + testId,
					null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				int i=0;				
				do {
					Question qstTmp = new Question();
					ArrayList<String> dataList = new ArrayList<String>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}
					qstTmp.setId(Integer.parseInt(dataList.get(0)));
					qstTmp.setBody(dataList.get(1));
					qstTmp.setTest_id(Integer.parseInt(dataList.get(2)));
					qstTmp.setMyOptions(getOptions(qstTmp.getId()));
					myQsts.add(i, qstTmp);
					i++;
				} while (cursor.moveToNext());
			}
		} catch (SQLException e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
		return myQsts;
	}

	public ArrayList<Option> getOptions(int questId) {
		String tableName = "";
		String[] fields = new String[] {};
		ArrayList<Option> myOpts = new ArrayList<Option>();
		fields = options_fields;
		tableName = "options";
		Cursor cursor;
		try {
			cursor = db.query(tableName, fields,
					fields[2] + " LIKE " + questId, null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				do {
					Option optTmp = new Option();
					ArrayList<String> dataList = new ArrayList<String>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}
					optTmp.setId(Integer.parseInt(dataList.get(0)));
					optTmp.setBody(dataList.get(1));
					optTmp.setQuestion_id(Integer.parseInt(dataList.get(2)));
					optTmp.setCorrect(new Boolean(dataList.get(3)));

					myOpts.add(optTmp);
				} while (cursor.moveToNext());
			}
		} catch (SQLException e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
		return myOpts;
	}

	public ArrayList<ArrayList<Object>> getTest(String name) {
		String[] fields = new String[] {};
		String cl_name = "Test";
		String tableName = "";

		fields = test_fields;
		tableName = "test";

		ArrayList<ArrayList<Object>> dataArrays = new ArrayList<ArrayList<Object>>();
		Cursor cursor;
		try {
			cursor = db.query(tableName, fields, fields[1] + " LIKE " + name,
					null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				do {
					ArrayList<Object> dataList = new ArrayList<Object>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}
					dataArrays.add(dataList);
				} while (cursor.moveToNext());
			}
		} catch (SQLException e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
		return dataArrays;
	}
	public ArrayList<TestTaker> getUserTests(int uId) {
		String tableName = "test_taker";
		String[] fields = test_taker_fields;
		
		ArrayList<TestTaker> myReturn= new ArrayList<TestTaker>();
		Cursor cursor;
		try {
			String where = "";
			if(uId!=0)
			{
				where = fields[1]+" LIKE "+uId;
			}
			cursor = db.query(tableName, fields, where,
					null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				
				do {
					TestTaker uTmp= new TestTaker();
					ArrayList<String> dataList = new ArrayList<String>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}
					uTmp.setId(Integer.parseInt(dataList.get(0)));
					uTmp.setUser_id(Integer.parseInt(dataList.get(1)));
					uTmp.setTest_id(Integer.parseInt(dataList.get(2)));
					uTmp.setScore(Integer.parseInt(dataList.get(4)));
					uTmp.setDate(dataList.get(3));
					myReturn.add(uTmp);
				} while (cursor.moveToNext());
			}
		} catch (SQLException e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
		return myReturn;
	}

	public ArrayList<User> getUsers(int uId) {
		String tableName = "user";
		String[] fields = user_fields;
		
		ArrayList<User> myReturn= new ArrayList<User>();
		Cursor cursor;
		try {
			String where = "";
			if(uId!=0)
			{
				where = fields[0]+" LIKE "+uId;
			}
			cursor = db.query(tableName, fields, where,
					null, null, null, null);
			cursor.moveToFirst();
			if (!cursor.isAfterLast()) {
				
				do {
					User uTmp= new User();
					ArrayList<String> dataList = new ArrayList<String>();
					for (int position = 0; position < fields.length; position++) {
						dataList.add(cursor.getString(position));
					}

					uTmp.setId(Integer.parseInt(dataList.get(0)));
					uTmp.setName(dataList.get(1));
					uTmp.setUsername(dataList.get(2));
					uTmp.setPassword(dataList.get(3));
					myReturn.add(uTmp);
				} while (cursor.moveToNext());
			}
		} catch (SQLException e) {
			Log.e("DB Error", e.toString());
			e.printStackTrace();
		}
		return myReturn;
	}
	/**
	 * This function return the a db object based on its position
	 * 
	 * @author Rayan Zahab
	 * 
	 * @param position
	 *            position of the element to get (usually given based on user
	 *            selection)
	 * @param o
	 *            o this will be from type user or room or reservation. And will
	 *            be processed based on the type in the getTablesRowsAsArrays()
	 * 
	 * @return ArrayList<Object>
	 */
	public ArrayList<Object> getObjectFromPosition(int position, Object o) {
		ArrayList<ArrayList<Object>> dataArrays = new ArrayList<ArrayList<Object>>();

		// Get all data in the db by passing the object
		dataArrays = this.getTablesRowsAsArrays(o);

		// get the object at the needed position
		ArrayList<Object> row = dataArrays.get(position);

		return row;
	}


	public void testType() {
		ArrayList<Object> tt = new ArrayList<Object>();
		tt.add(new TestType("TF"));
		tt.add(new TestType("MCQ"));
		tt.add(new TestType("OP"));
		for (int i = 0; i < tt.size(); i++) {
			insertRow(tt.get(i));
		}
	}
}