81 lines
3.4 KiB
Java
81 lines
3.4 KiB
Java
/* Copyright (C) 2016-2017 Andreas Shimokawa, Carsten Pfeiffer
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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 <http://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.database.schema;
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import android.database.sqlite.SQLiteDatabase;
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import android.widget.Toast;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import nodomain.freeyourgadget.gadgetbridge.database.DBUpdateScript;
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import nodomain.freeyourgadget.gadgetbridge.util.GB;
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public class SchemaMigration {
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private static final Logger LOG = LoggerFactory.getLogger(SchemaMigration.class);
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private final String classNamePrefix;
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public SchemaMigration(String updaterClassNamePrefix) {
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classNamePrefix = updaterClassNamePrefix;
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}
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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LOG.info("ActivityDatabase: schema upgrade requested from " + oldVersion + " to " + newVersion);
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try {
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for (int i = oldVersion + 1; i <= newVersion; i++) {
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DBUpdateScript updater = getUpdateScript(db, i);
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if (updater != null) {
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LOG.info("upgrading activity database to version " + i);
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updater.upgradeSchema(db);
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}
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}
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LOG.info("activity database is now at version " + newVersion);
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} catch (RuntimeException ex) {
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GB.toast("Error upgrading database.", Toast.LENGTH_SHORT, GB.ERROR, ex);
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throw ex; // reject upgrade
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}
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}
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public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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LOG.info("ActivityDatabase: schema downgrade requested from " + oldVersion + " to " + newVersion);
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try {
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for (int i = oldVersion; i >= newVersion; i--) {
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DBUpdateScript updater = getUpdateScript(db, i);
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if (updater != null) {
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LOG.info("downgrading activity database to version " + (i - 1));
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updater.downgradeSchema(db);
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}
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}
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LOG.info("activity database is now at version " + newVersion);
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} catch (RuntimeException ex) {
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GB.toast("Error downgrading database.", Toast.LENGTH_SHORT, GB.ERROR, ex);
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throw ex; // reject downgrade
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}
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}
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private DBUpdateScript getUpdateScript(SQLiteDatabase db, int version) {
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try {
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Class<?> updateClass = getClass().getClassLoader().loadClass(getClass().getPackage().getName() + "." + classNamePrefix + version);
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return (DBUpdateScript) updateClass.newInstance();
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} catch (ClassNotFoundException e) {
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return null;
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} catch (InstantiationException | IllegalAccessException e) {
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throw new RuntimeException("Error instantiating DBUpdate class for version " + version, e);
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}
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}
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}
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