/* Copyright (C) 2016-2024 Andreas Shimokawa, Carsten Pfeiffer, Taavi Eomäe
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge;
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import android.database.sqlite.SQLiteDatabase;
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import android.database.sqlite.SQLiteOpenHelper;
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import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
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import nodomain.freeyourgadget.gadgetbridge.entities.DaoMaster;
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import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
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/**
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* Provides low-level access to the database.
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*/
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public class LockHandler implements DBHandler {
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private DaoMaster daoMaster = null;
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private DaoSession session = null;
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private SQLiteOpenHelper helper = null;
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public LockHandler() {
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}
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public void init(DaoMaster daoMaster, DaoMaster.OpenHelper helper) {
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if (isValid()) {
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throw new IllegalStateException("DB must be closed before initializing it again");
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}
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if (daoMaster == null) {
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throw new IllegalArgumentException("daoMaster must not be null");
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}
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if (helper == null) {
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throw new IllegalArgumentException("helper must not be null");
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}
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this.daoMaster = daoMaster;
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this.helper = helper;
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session = daoMaster.newSession();
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if (session == null) {
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throw new RuntimeException("Unable to create database session");
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}
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}
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@Override
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public DaoMaster getDaoMaster() {
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return daoMaster;
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}
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private boolean isValid() {
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return daoMaster != null;
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}
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private void ensureValid() {
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if (!isValid()) {
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throw new IllegalStateException("LockHandler is not in a valid state");
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}
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}
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@Override
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public void close() {
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ensureValid();
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GBApplication.releaseDB();
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}
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@Override
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public synchronized void openDb() {
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if (session != null) {
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throw new IllegalStateException("session must be null");
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}
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// this will create completely new db instances and in turn update this handler through #init()
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GBApplication.app().setupDatabase();
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}
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@Override
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public synchronized void closeDb() {
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if (session == null) {
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throw new IllegalStateException("session must not be null");
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}
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session.clear();
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session.getDatabase().close();
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session = null;
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helper = null;
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daoMaster = null;
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}
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@Override
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public SQLiteOpenHelper getHelper() {
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ensureValid();
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return helper;
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}
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@Override
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public DaoSession getDaoSession() {
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ensureValid();
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return session;
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}
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@Override
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public SQLiteDatabase getDatabase() {
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ensureValid();
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return daoMaster.getDatabase();
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}
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}
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