PhrescoApp.java

/**
 * PHR_AndroidNative
 *
 * Copyright (C) 1999-2014 Photon Infotech Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.photon.phresco.nativeapp.eshop.application;

import android.app.Application;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import com.photon.phresco.nativeapp.eshop.db.AppConfiguration;
import com.photon.phresco.nativeapp.eshop.logger.PhrescoLogger;

/**
 * Base class to maintain global application state. This class will be
 * instantiated when the process for your application/package is created.
 *
 * @author viral_b
 *
 */
public class PhrescoApp extends Application {
	private static final String TAG = "PhrescoApp ***** ";
	private static final String DB_NAME = "Phresco";
	private static final int DB_VERSION = 1;

	// AppConfig table
	private static final String CONFIG_TABLE_CREATE = "CREATE TABLE IF NOT EXISTS "
			+ AppConfiguration.DATABASE_TABLE
			+ " (_id integer primary key autoincrement, "
			+ "metafield text not null," + "metavalue text not null);";

	private SQLiteDatabase writeableDB;

	/**
	 * Create the writable database object to be used to read and write data to
	 * @return SQlite database object
	 */
	public SQLiteDatabase getDatabase() {
		if (writeableDB == null) {
			try {
				writeableDB = new DatabaseHelper(this).getWritableDatabase();
			} catch (Exception ex) {
				PhrescoLogger.info(TAG + "Could not create or open database : "
						+ ex);
				PhrescoLogger.warning(ex);
			}
		}
		return writeableDB;
	}

	/**
	 * Private class to handle the SQLite database related operations like
	 * create or update the database
	 * @author viral_b
	 *
	 */
	private static class DatabaseHelper extends SQLiteOpenHelper {

		DatabaseHelper(Context context) {
			super(context, DB_NAME, null, DB_VERSION);
		}

		public void onCreate(SQLiteDatabase db) {
			try {
				db.execSQL(CONFIG_TABLE_CREATE);
				PhrescoLogger.info(TAG + "onCreate fired ");
			} catch (Exception ex) {
				PhrescoLogger.info(TAG + "onCreate - Exception : " + ex);
				PhrescoLogger.warning(ex);
			}
		}

		public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
			try {
				db.execSQL("DROP TABLE IF EXISTS "
						+ AppConfiguration.DATABASE_TABLE);

				PhrescoLogger.info(TAG + "onUpgrade fired ");

				onCreate(db);
			} catch (Exception ex) {
				PhrescoLogger.info(TAG + "onUpgrade - Exception : " + ex);
				PhrescoLogger.warning(ex);
			}
		}

	}
}