private boolean executeMigrations(SQLiteDatabase db, int oldVersion, int newVersion) {
boolean migrationExecuted = false;
try {
final List<String> files = Arrays.asList(Cache.getContext().getAssets().list(MIGRATION_PATH));
Collections.sort(files, new NaturalOrderComparator());
db.beginTransaction();
try {
for (String file : files) {
try {
final int version = Integer.valueOf(file.replace(".sql", ""));
if (version > oldVersion && version <= newVersion) {
executeSqlScript(db, file);
migrationExecuted = true;
Log.i(file + " executed succesfully.");
}
} catch (NumberFormatException e) {
Log.w("Skipping invalidly named file: " + file, e);
}
}
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
} catch (IOException e) {
Log.e("Failed to execute migrations.", e);
}
return migrationExecuted;
}
public void copyAttachedDatabase(Context context, String databaseName) {
final File dbPath = context.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 {
final InputStream inputStream = context.getAssets().open(databaseName);
final OutputStream output = new FileOutputStream(dbPath);
byte[] buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) > 0) {
output.write(buffer, 0, length);
}
output.flush();
output.close();
inputStream.close();
} catch (IOException e) {
Log.e("Failed to open file", e);
}
}
public static synchronized void initialize(Application application) {
if (sIsInitialized) {
Log.v("ActiveAndroid already initialized.");
return;
}
sContext = application;
sModelInfo = new ModelInfo(application);
sDatabaseHelper = new DatabaseHelper(sContext);
sEntities = new HashSet<Model>();
sIsInitialized = true;
openDatabase();
Log.v("ActiveAndroid initialized succesfully.");
}
public static synchronized void dispose() {
checkInitialization();
closeDatabase();
sEntities = null;
sModelInfo = null;
sDatabaseHelper = null;
sIsInitialized = false;
Log.v("ActiveAndroid disposed. Call initialize to use library.");
}
private void executeSqlScript(SQLiteDatabase db, String file) {
InputStream stream = null;
try {
stream = Cache.getContext().getAssets().open(MIGRATION_PATH + "/" + file);
if (Configuration.SQL_PARSER_DELIMITED.equalsIgnoreCase(mSqlParser)) {
executeDelimitedSqlScript(db, stream);
} else {
executeLegacySqlScript(db, stream);
}
} catch (IOException e) {
Log.e("Failed to execute " + file, e);
} finally {
IOUtils.closeQuietly(stream);
}
}
public static synchronized void clear() {
sEntities = new HashSet<Model>();
Log.v("Cache cleared.");
}
private void executePragmas(SQLiteDatabase db) {
if (SQLiteUtils.FOREIGN_KEYS_SUPPORTED) {
db.execSQL("PRAGMA foreign_keys=ON;");
Log.i("Foreign Keys supported. Enabling foreign key features.");
}
}