BartRunnerAndroid/src/com/dougkeen/bart/data/DatabaseHelper.java

70 lines
2.0 KiB
Java

package com.dougkeen.bart.data;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import com.dougkeen.bart.BartRunnerApplication;
import com.dougkeen.bart.model.StationPair;
public class DatabaseHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "bart.dougkeen.db";
private static final int DATABASE_VERSION = 6;
public static final String FAVORITES_TABLE_NAME = "Favorites";
private BartRunnerApplication app;
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
app = (BartRunnerApplication) context.getApplicationContext();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
private void createFavoritesTable(SQLiteDatabase db) {
db.execSQL("CREATE TABLE IF NOT EXISTS " + FAVORITES_TABLE_NAME + " ("
+ RoutesColumns._ID.getColumnDef() + " PRIMARY KEY, "
+ RoutesColumns.FROM_STATION.getColumnDef() + ", "
+ RoutesColumns.TO_STATION.getColumnDef() + ", "
+ RoutesColumns.FARE.getColumnDef() + ", "
+ RoutesColumns.FARE_LAST_UPDATED.getColumnDef() + ", "
+ RoutesColumns.AVERAGE_TRIP_SAMPLE_COUNT.getColumnDef() + ", "
+ RoutesColumns.AVERAGE_TRIP_LENGTH.getColumnDef() + ");");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.beginTransaction();
try {
createFavoritesTable(db);
Cursor query = db.query(FAVORITES_TABLE_NAME, RoutesColumns.all(),
null, null, null, null, null);
List<StationPair> favorites = new ArrayList<StationPair>();
while (query.moveToNext()) {
favorites.add(StationPair.createFromCursor(query));
}
query.close();
new FavoritesPersistence(app).persist(favorites);
db.execSQL("DROP TABLE " + FAVORITES_TABLE_NAME);
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
}
}