X-Git-Url: https://git.ktnx.net/?a=blobdiff_plain;f=app%2Fsrc%2Fmain%2Fjava%2Fnet%2Fktnx%2Fmobileledger%2Futils%2FMLDB.java;h=178b7b2017484f6e93fa16bf09a60dbc8671b76e;hb=HEAD;hp=4f627779b93fb238c9cbe23c4531ff4b19f4232c;hpb=e08f8e03661c9780e4a8f291fd04cab2448de19d;p=mobile-ledger.git diff --git a/app/src/main/java/net/ktnx/mobileledger/utils/MLDB.java b/app/src/main/java/net/ktnx/mobileledger/utils/MLDB.java deleted file mode 100644 index 4f627779..00000000 --- a/app/src/main/java/net/ktnx/mobileledger/utils/MLDB.java +++ /dev/null @@ -1,172 +0,0 @@ -/* - * Copyright © 2018 Damyan Ivanov. - * This file is part of Mobile-Ledger. - * Mobile-Ledger is free software: you can distribute it and/or modify it - * under the term of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your opinion), any later version. - * - * Mobile-Ledger is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License terms for details. - * - * You should have received a copy of the GNU General Public License - * along with Mobile-Ledger. If not, see . - */ - -package net.ktnx.mobileledger.utils; - -import android.content.Context; -import android.content.res.Resources; -import android.database.Cursor; -import android.database.SQLException; -import android.database.sqlite.SQLiteDatabase; -import android.database.sqlite.SQLiteOpenHelper; -import android.util.Log; - -import java.io.BufferedReader; -import java.io.IOException; -import java.io.InputStream; -import java.io.InputStreamReader; -import java.util.Locale; - -import static net.ktnx.mobileledger.utils.MLDB.DatabaseMode.READ; -import static net.ktnx.mobileledger.utils.MLDB.DatabaseMode.WRITE; - -public final class MLDB { - public enum DatabaseMode {READ, WRITE} - - public static final String ACCOUNTS_TABLE = "accounts"; - public static final String DESCRIPTION_HISTORY_TABLE = "description_history"; - public static final String OPT_TRANSACTION_LIST_STAMP = "transaction_list_last_update"; - private static MobileLedgerDatabase helperForReading, helperForWriting; - - public static synchronized SQLiteDatabase getDatabase(Context context, DatabaseMode mode) { - if (mode == READ) { - if (helperForReading == null) helperForReading = new MobileLedgerDatabase(context); - return helperForReading.getReadableDatabase(); - } - else { - if (helperForWriting == null) helperForWriting = new MobileLedgerDatabase(context); - return helperForWriting.getWritableDatabase(); - } - } - public static SQLiteDatabase getReadableDatabase(Context context) { - return getDatabase(context.getApplicationContext(), READ); - } - public static SQLiteDatabase getWritableDatabase(Context context) { - return getDatabase(context.getApplicationContext(), WRITE); - } - static public int get_option_value(Context context, String name, int default_value) { - String s = get_option_value(context, name, String.valueOf(default_value)); - try { - return Integer.parseInt(s); - } - catch (Exception e) { - Log.d("db", "returning default int value of " + name, e); - return default_value; - } - } - - static public long get_option_value(Context context, String name, long default_value) { - String s = get_option_value(context, 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 public String get_option_value(Context context, String name, String default_value) { - Log.d("db", "about to fetch option " + name); - try (SQLiteDatabase db = getReadableDatabase(context)) { - 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 public void set_option_value(Context context, String name, String value) { - Log.d("db", "setting option " + name + "=" + value); - try (SQLiteDatabase db = getWritableDatabase(context)) { - db.execSQL("insert or replace into options(name, value) values(?, ?);", - new String[]{name, value}); - } - } - - static public void set_option_value(Context context, String name, long value) { - set_option_value(context, name, String.valueOf(value)); - } -} - -class MobileLedgerDatabase extends SQLiteOpenHelper implements AutoCloseable { - public static final String DB_NAME = "mobile-ledger.db"; - public static final int LATEST_REVISION = 10; - - private final Context mContext; - - public MobileLedgerDatabase(Context context) { - super(context, DB_NAME, null, LATEST_REVISION); - Log.d("db", "creating helper instance"); - mContext = context; - super.setWriteAheadLoggingEnabled(true); - } - - @Override - public void onCreate(SQLiteDatabase db) { - Log.d("db", "onCreate called"); - onUpgrade(db, -1, LATEST_REVISION); - } - - @Override - public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { - Log.d("db", "onUpgrade called"); - for (int i = oldVersion + 1; i <= newVersion; i++) applyRevision(db, i); - } - - private void applyRevision(SQLiteDatabase db, int rev_no) { - final Resources rm = mContext.getResources(); - String rev_file = String.format(Locale.US, "sql_%d", rev_no); - - int res_id = rm.getIdentifier(rev_file, "raw", mContext.getPackageName()); - if (res_id == 0) throw new SQLException( - String.format(Locale.US, "No resource for revision %d", rev_no)); - 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); - } - - db.setTransactionSuccessful(); - } - catch (IOException e) { - Log.e("db", String.format("Error opening raw resource for revision %d", rev_no)); - e.printStackTrace(); - } - finally { - db.endTransaction(); - } - } -}