+ GigiResultSet rs = getInstance().prepare("SELECT version FROM schemeVersion ORDER BY version DESC LIMIT 1").executeQuery();
+ int version = 0;
+ if (rs.next()) {
+ version = rs.getInt(1);
+ }
+ if (version == CURRENT_SCHEMA_VERSION) {
+ return; // Good to go
+ }
+ if (version > CURRENT_SCHEMA_VERSION) {
+ throw new Error("Invalid database version. Please fix this.");
+ }
+ upgrade(version);
+ }
+
+ private static void upgrade(int version) {
+ try {
+ Statement s = getInstance().c.createStatement();
+ try {
+ while (version < CURRENT_SCHEMA_VERSION) {
+ try (InputStream resourceAsStream = DatabaseConnection.class.getResourceAsStream("upgrade/from_" + version + ".sql")) {
+ if (resourceAsStream == null) {
+ throw new Error("Upgrade script from version " + version + " was not found.");
+ }
+ SQLFileManager.addFile(s, resourceAsStream, ImportType.PRODUCTION);
+ }
+ version++;
+ }
+ s.addBatch("UPDATE schemeVersion SET version='" + version + "'");
+ System.out.println("UPGRADING Database to version " + version);
+ s.executeBatch();
+ System.out.println("done.");
+ } finally {
+ s.close();
+ }
+ } catch (SQLException e) {
+ e.printStackTrace();
+ } catch (IOException e) {
+ e.printStackTrace();
+ }