+ fillDataHash();
+ db.execSQL("INSERT INTO transactions(id, date, description, data_hash) values(?,?,?,?)",
+ new Object[]{id, date, description, dataHash});
+
+ for (LedgerTransactionItem item : items) {
+ db.execSQL("INSERT INTO transaction_accounts(transaction_id, account_name, amount, " +
+ "currency) values(?, ?, ?, ?)",
+ new Object[]{id, item.getAccountName(), item.getAmount(), item.getCurrency()});
+ }
+ }
+ private void fillDataHash() {
+ if (dataHash != null) return;
+ try {
+ Digest sha = new Digest(DIGEST_TYPE);
+ StringBuilder data = new StringBuilder();
+ data.append(getId());
+ data.append('\0');
+ data.append(getDescription());
+ data.append('\0');
+ for (LedgerTransactionItem item : items) {
+ data.append(item.getAccountName());
+ data.append('\0');
+ data.append(item.getCurrency());
+ data.append('\0');
+ data.append(item.getAmount());
+ }
+ sha.update(data.toString().getBytes(Charset.forName("UTF-8")));
+ dataHash = sha.digestToHexString();
+ }
+ catch (NoSuchAlgorithmException e) {
+ throw new RuntimeException(
+ String.format("Unable to get instance of %s digest", DIGEST_TYPE), e);
+ }
+ }
+ public boolean existsInDb(SQLiteDatabase db) {
+ fillDataHash();
+ try (Cursor c = db
+ .rawQuery("SELECT 1 from transactions where data_hash = ?", new String[]{dataHash}))
+ {
+ boolean result = c.moveToFirst();
+ Log.d("transactions", String.format("Transaction %d (%s) %s", id, dataHash,
+ result ? "already present" : "not present"));
+ return result;
+ }
+ }
+ public void loadData(SQLiteDatabase db) {
+ if (dataLoaded) return;
+
+ try (Cursor cTr = db.rawQuery("SELECT date, description from transactions WHERE id=?",
+ new String[]{String.valueOf(id)}))
+ {
+ if (cTr.moveToFirst()) {
+ date = cTr.getString(0);
+ description = cTr.getString(1);
+
+ try (Cursor cAcc = db.rawQuery("SELECT account_name, amount, currency FROM " +
+ "transaction_accounts WHERE transaction_id = ?",
+ new String[]{String.valueOf(id)}))
+ {
+ while (cAcc.moveToNext()) {
+ add_item(new LedgerTransactionItem(cAcc.getString(0), cAcc.getFloat(1),
+ cAcc.getString(2)));
+ }