+++ /dev/null
-package net.ktnx.mobileledger;
-
-import android.content.res.Resources;
-import android.database.Cursor;
-import android.database.SQLException;
-import android.database.sqlite.SQLiteDatabase;
-import android.util.Log;
-
-import java.io.BufferedReader;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.util.Locale;
-
-class MobileLedgerDB {
- static final String DATABASE_NAME = "accounts";
- static final String OPT_DB_REVISION = "db_revision";
- static final String ACCOUNTS_TABLE = "accounts";
- static final String DESCRIPTION_HISTORY_TABLE = "description_history";
- private static String db_filename;
- static SQLiteDatabase db;
-
- static String getDb_filename() {
- return db_filename;
- }
-
- static void setDb_filename(String db_filename) {
- MobileLedgerDB.db_filename = db_filename;
- }
-
- static void initDB(Resources rm, String pkg_name) {
- db = SQLiteDatabase.openOrCreateDatabase(db_filename, null);
- int cur_ver = Integer.parseInt(get_option_value(OPT_DB_REVISION, "-1"));
-
- Log.d("db", "Current DB revision is "+String.valueOf(cur_ver));
-
- while (applyRevision(rm, pkg_name, cur_ver+1)) {
- cur_ver++;
- }
-
- Log.d("db", "Database revision is "+String.valueOf(cur_ver)+" now");
- }
- private static boolean applyRevision(Resources rm, String pkg_name, int rev_no) {
- String rev_file = String.format(Locale.US, "sql_%d", rev_no);
-
- int res_id = rm.getIdentifier(rev_file, "raw", pkg_name);
- if (res_id == 0) {
- Log.d("db", String.format(Locale.US, "No resource for revision %d", rev_no));
- return false;
- }
- db.beginTransaction();
- try (InputStream res = rm.openRawResource(res_id)) {
- Log.d("db", "Applying revision " + String.valueOf(rev_no));
- InputStreamReader isr = new InputStreamReader(res);
- BufferedReader reader = new BufferedReader(isr);
-
- String line;
- while ((line = reader.readLine()) != null) {
- db.execSQL(line);
- }
-
- set_option_value(OPT_DB_REVISION, rev_no);
- db.setTransactionSuccessful();
- } catch (Resources.NotFoundException e) {
- Log.d("db", "SQL revision "+String.valueOf(rev_no)+" not found");
- return false;
- }
- catch (SQLException e) {
- Log.e("db", String.format(Locale.US, "Error applying revision %d: %s", rev_no, e.getMessage()));
- return false;
- }
- catch (Exception e) {
- Log.w("db", "Error reading revision" + String.valueOf(rev_no)+": "+e.getMessage());
- return false;
- }
- finally {
- db.endTransaction();
- }
-
- return true;
- }
-
- static int get_option_value(String name, int default_value) {
- String s = get_option_value(name, String.valueOf(default_value));
- try {
- return Integer.parseInt(s);
- }
- catch (Exception e) {
- return default_value;
- }
- }
-
- static long get_option_value(String name, long default_value) {
- String s = get_option_value(name, String.valueOf(default_value));
- try {
- return Long.parseLong(s);
- }
- catch (Exception e) {
- Log.d("db", "returning default long value of "+name, e);
- return default_value;
- }
- }
-
- static String get_option_value(String name, String default_value) {
- Log.d("db", "about fo fetch option "+name);
- try (Cursor cursor = db.rawQuery("select value from options where name=?", new String[]{name})) {
- if (cursor.moveToFirst()) {
- String result = cursor.getString(0);
-
- if (result == null ) result = default_value;
-
- Log.d("db", "option "+name+"="+result);
- return result;
- }
- else return default_value;
- }
- catch(Exception e) {
- Log.d("db", "returning default value for "+name, e);
- return default_value;
- }
- }
-
- static void set_option_value(String name, String value) {
- Log.d("db", "setting option "+name+"="+value);
- db.execSQL("insert or replace into options(name, value) values(?, ?);", new String[]{name, value});
- }
-
- static void set_option_value(String name, long value) {
- set_option_value(name, String.valueOf(value));
- }
-}