/**
* Will use the already existing app database if {@link BaseDatabaseDefinition#backupEnabled()} is
* true. If the existing is not there we will try to use the prepackaged database for that
* purpose.
*
* @param databaseName The name of the database to restore
* @param prepackagedName The name of the prepackaged db file
*/
public void restoreDatabase(String databaseName, String prepackagedName) {
final File dbPath = FlowManager.getContext().getDatabasePath(databaseName);
// If the database already exists, return
if (dbPath.exists()) {
return;
}
// Make sure we have a path to the file
dbPath.getParentFile().mkdirs();
// Try to copy database file
try {
// check existing and use that as backup
File existingDb =
FlowManager.getContext().getDatabasePath(databaseDefinition.getDatabaseFileName());
InputStream inputStream;
// if it exists and the integrity is ok
if (existingDb.exists()
&& (databaseDefinition.backupEnabled()
&& FlowManager.isDatabaseIntegrityOk(backupHelper))) {
inputStream = new FileInputStream(existingDb);
} else {
inputStream = FlowManager.getContext().getAssets().open(prepackagedName);
}
writeDB(dbPath, inputStream);
} catch (IOException e) {
FlowLog.logError(e);
}
}
public FlowSQLiteOpenHelper(
BaseDatabaseDefinition databaseDefinition, DatabaseHelperListener listener) {
super(
FlowManager.getContext(),
databaseDefinition.isInMemory() ? null : databaseDefinition.getDatabaseFileName(),
null,
databaseDefinition.getDatabaseVersion());
databaseHelperListener = listener;
this.databaseDefinition = databaseDefinition;
movePrepackagedDB(
this.databaseDefinition.getDatabaseFileName(),
this.databaseDefinition.getDatabaseFileName());
if (databaseDefinition.backupEnabled()) {
// Temp database mirrors existing
backupHelper =
new SQLiteOpenHelper(
FlowManager.getContext(),
getTempDbFileName(),
null,
databaseDefinition.getDatabaseVersion()) {
@Override
public void onOpen(SQLiteDatabase db) {
FlowSQLiteOpenHelper.this.onOpen(db);
}
@Override
public void onCreate(SQLiteDatabase db) {
FlowSQLiteOpenHelper.this.onCreate(db);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
FlowSQLiteOpenHelper.this.onUpgrade(db, oldVersion, newVersion);
}
};
restoreDatabase(getTempDbFileName(), this.databaseDefinition.getDatabaseFileName());
backupHelper.getWritableDatabase();
}
}