UserInfoDbHelper.java

/*****************************************************************
 * Copyright (c) 2013 by CDAC Chennai 
 * @File        UserInfoDbHelper
 * @Created:    06.06.2014
 * @author:     Prasenjit
 * Last Change: 06.06.2014 by Prasenjit
 ******************************************************************/
package com.contextawareframework.dbmanager;

import java.security.Principal;
import java.util.ArrayList;
import java.util.List;

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

import com.contextawareframework.globalvariable.CAFConfig;
import com.contextawareframework.os.UserInfo;

/**
 * This is a database helper class for all CRUD operation on User information.
 */
public class  UserInfoDbHelper{

	// Database fields
	private SQLiteDatabase database;
	private ContextAwareSQLiteHelper dbHelper;
	private static UserInfoDbHelper userInfoDbHelper;
	private static boolean enableDebugging = CAFConfig.isEnableDebugging();
	private String TAG =  "UserInfoDbHelper" ;
	
	private String[] allColumns = { ContextAwareSQLiteHelper.COLUMN_USER_EMAIL,
			ContextAwareSQLiteHelper.COLUMN_USER_ID, ContextAwareSQLiteHelper.COLUMN_DEV_EMAIL, ContextAwareSQLiteHelper.COLUMN_DEVICE_ID, ContextAwareSQLiteHelper.COLUMN_APP_ID
	};
	
	/**
	 * Default Constructor
	 */
	private UserInfoDbHelper(Context context) {
		dbHelper = new ContextAwareSQLiteHelper(context);
	}

	public static synchronized UserInfoDbHelper getInstance(Context context)
	{
		if (userInfoDbHelper == null)
			userInfoDbHelper = new UserInfoDbHelper(context);

		return userInfoDbHelper;
	}
	/**
	 * Method to enable debugging
	 * @param boolean
	 */
	public void setEnableDebugging(boolean value)
	{
		enableDebugging = value;
	}

	/**
	 * Method to get the present value of enableDebugging
	 * @return boolean
	 */
	public boolean getEnableDebugging()
	{
		return enableDebugging;
	}

	/**
	 * Method to open the database for writing
	 */
	public void open() throws SQLException {
		database = dbHelper.getWritableDatabase();
	}
	/**
	 * Method to open the database in read only mode 
	 */
	public void openReadOnly()
	{
		try
		{
			database = dbHelper.getReadableDatabase();
		}
		catch(SQLException e)
		{
			e.printStackTrace();
		}
	}
	/**
	 * Method to close the database connection
	 */
	public void close() {
		dbHelper.close();
	}
	
	/**
	 * Method to create insert a row of data into the database
	 */
	public UserInfo createUserInfoRowData(String userEmail,String userId, String devEmail, String deviceId,String appId){
		ContentValues values = new ContentValues();
		UserInfo newRow = null;
		try
		{
			values.put(ContextAwareSQLiteHelper.COLUMN_USER_EMAIL, userEmail);
			values.put(ContextAwareSQLiteHelper.COLUMN_USER_ID,userId);
			values.put(ContextAwareSQLiteHelper.COLUMN_DEV_EMAIL, devEmail);
			values.put(ContextAwareSQLiteHelper.COLUMN_DEVICE_ID, deviceId);
			values.put(ContextAwareSQLiteHelper.COLUMN_APP_ID, appId);
			values.put(ContextAwareSQLiteHelper.COLUMN_USER_AUTH_STATUS, "false");
			long insertId = database.insert(ContextAwareSQLiteHelper.TABLE_USERINFO, null,
					values);
			Cursor cursor = database.query(ContextAwareSQLiteHelper.TABLE_USERINFO,
					allColumns, ContextAwareSQLiteHelper.COLUMN_USER_ID + " = " + insertId, null,
					null, null, null);
			cursor.moveToFirst();
			newRow = getUserDetails(cursor);
			cursor.close();
			if(enableDebugging)
			{
				Log.d(TAG,"createUserInfoRowData Method");
			}
		}
		catch(SQLException e)
		{
			e.printStackTrace();
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		return newRow;
	}

	/**
	 * Method to delete a row from database 
	 */
	public void deleteUserInfoRowData(UserInfo userInfo) {
		try{
			String id = userInfo.getUserId();
			System.out.println("Comment deleted with id: " + id);
			database.delete(ContextAwareSQLiteHelper.TABLE_USERINFO, ContextAwareSQLiteHelper.COLUMN_USER_ID
					+ " = " + id, null);
		}
		catch(SQLException e)
		{
			e.printStackTrace();
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}
	/**
	 * Method to list all row of the UserInfo table
	 */
	public List<UserInfo> getAllRows() {
		List<UserInfo> comments = new ArrayList<UserInfo>();
		try
		{
			Cursor cursor = database.query(ContextAwareSQLiteHelper.TABLE_USERINFO,
					allColumns, null, null, null, null, null);

			cursor.moveToFirst();
			while (!cursor.isAfterLast()) {
				UserInfo userinfo = getUserDetails(cursor);
				comments.add(userinfo);
				cursor.moveToNext();
			}
			// Make sure to close the cursor
			cursor.close();
		}
		catch(SQLException e)
		{
			e.printStackTrace();
		}
		catch(Exception e)
		{
			e.printStackTrace();			
		}
		return comments;
	}
	/**
	 * Method to intialize a UserInfo POJO object
	 */
	private UserInfo getUserDetails(Cursor cursor) {
		UserInfo userinfo = new UserInfo();
		try
		{
			userinfo.setUserEmailId(cursor.getString(0));
			userinfo.setDeveloperEmail(cursor.getString(1));
			userinfo.setDeviceId(cursor.getString(2));
			userinfo.setUserId(cursor.getString(3));
			userinfo.setAppId(cursor.getString(4));
			userinfo.setAuthenticatedUser(false);
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		return userinfo;
	}
}