/*
* Copyright (C) 2008 Google 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 rowan.application.quickaccess.rss;
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;
/**
* Database for RSS feeds
*
* Holds multiple tables and can create entries, return all entries
*
*/
public class RssDbAdapter {
public static final String KEY_TITLE = "title";
public static final String KEY_BODY = "body";
public static final String KEY_LINK = "link";
public static final String KEY_IMAGE = "image";
public static final String KEY_ROWID = "_id";
private static final String TAG = "NotesDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
public static final String DATABASE_TABLE = "rowan";
public static final String DATABASE_TABLE_SPORTS ="sports";
public static final String DATABASE_TABLE_TWITTER = "twitter";
private static final String DATABASE_NAME = "data";
private static final int DATABASE_VERSION = 2;
/**
* Database creation sql statement for Rowan Alethics
*/
private static final String DATABASE_CREATE_SPORTS =
"create table sports (_id integer primary key autoincrement, "
+ "title text not null, body text not null, link text not null, image blob not null);";
/**
* Database creation sql statement for Rowan website
*/
public static final String DATABASE_CREATE =
"create table rowan (_id integer primary key autoincrement, "
+ "title text not null, body text not null, link text not null);";
/**
* Database creation sql statement for Rowan twitter
*/
public static final String DATABASE_CREATE_TWITTER =
"create table twitter (_id integer primary key autoincrement, "
+ "title text not null, body text not null, link text not null);";
private final Context mCtx;
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(DATABASE_CREATE); // Create Rowan Table
db.execSQL(DATABASE_CREATE_SPORTS); // Create Sports Table
db.execSQL(DATABASE_CREATE_TWITTER); // Create Twitter Table
}
/**
* If the table names of the current feeds change, or any part of the Schema, the db version should change
* if the DB version is changed this method will be called and handle what should happen on upgrades
*/
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS rowan");
db.execSQL("DROP TABLE IF EXISTS sports");
db.execSQL("DROP TABLE IF EXISTS twitter");
onCreate(db);
}
}
/**
* Constructor - takes the context to allow the database to be
* opened/created
*
* @param ctx the Context within which to work
*/
public RssDbAdapter(Context ctx) {
this.mCtx = ctx;
}
/**
* Open the notes database. If it cannot be opened, try to create a new
* instance of the database. If it cannot be created, throw an exception to
* signal the failure
*
* @return this (self reference, allowing this to be chained in an
* initialization call)
* @throws SQLException if the database could be neither opened or created
*/
public RssDbAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
mDbHelper.close();
}
/**
*
* @param title the title of the article
* @param body the body of the article
* @param link Link referring to the article
* @param image Image associated with article if has one
* @param table The table for the entry to be added to
* @return rowId or -1 if failed
*/
public long createEntry(String title, String body, String link, byte[] image, String table) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_TITLE, title);
initialValues.put(KEY_BODY, body);
initialValues.put(KEY_LINK, link);
if (table.equals(DATABASE_TABLE_SPORTS)) {
initialValues.put(KEY_IMAGE, image);
}
return mDb.insert(table, null, initialValues);
}
/**
* Delete the note with the given rowId
*
* @param rowId id of note to delete
* @return true if deleted, false otherwise
*/
public boolean deleteEntry(long rowId, String table) {
return mDb.delete(table, KEY_ROWID + "=" + rowId, null) > 0;
}
/**
* Return a Cursor over the list of all notes in the database
*
* @return Cursor over all notes
*/
public Cursor fetchAllEntries(String table) {
if (table.equals(DATABASE_TABLE_SPORTS)){
return mDb.query(table, new String[] {KEY_ROWID, KEY_TITLE,
KEY_BODY, KEY_LINK, KEY_IMAGE}, null, null, null, null, null);
}
return mDb.query(table, new String[] {KEY_ROWID, KEY_TITLE,
KEY_BODY, KEY_LINK}, null, null, null, null, null);
}
/**
* Return a Cursor positioned at the note that matches the given rowId
*
* @param rowId id of note to retrieve
* @return Cursor positioned to matching note, if found
* @throws SQLException if note could not be found/retrieved
*/
public Cursor fetchEntry(long rowId, String table) throws SQLException {
Cursor mCursor =
mDb.query(true, table, new String[] {KEY_ROWID,
KEY_TITLE, KEY_BODY}, KEY_ROWID + "=" + rowId, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public boolean clearTable(String table)
{
try{
mDb.execSQL("DELETE FROM "+table);
}
catch (Exception e)
{
return false;
}
return true;
}
}
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