Java tutorial
/* * This file is part of Subsonic. * * Subsonic is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Subsonic 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 for more details. * * You should have received a copy of the GNU General Public License * along with Subsonic. If not, see <http://www.gnu.org/licenses/>. * * Copyright 2014 (C) Sindre Mehus */ package net.sourceforge.subsonic.dao.schema.hsql; import org.springframework.jdbc.core.JdbcTemplate; import net.sourceforge.subsonic.Logger; import net.sourceforge.subsonic.dao.schema.Schema; /** * Used for creating and evolving the database schema. * This class implements the database schema for Subsonic version 5.1. * * @author Sindre Mehus */ public class Schema51 extends Schema { private static final Logger LOG = Logger.getLogger(Schema51.class); @Override public void execute(JdbcTemplate template) { if (template.queryForInt("select count(*) from version where version = 23") == 0) { LOG.info("Updating database schema to version 23."); template.execute("insert into version values (23)"); } if (!columnExists(template, "show_artist_info", "user_settings")) { LOG.info("Database column 'user_settings.show_artist_info' not found. Creating it."); template.execute("alter table user_settings add show_artist_info boolean default true not null"); LOG.info("Database column 'user_settings.show_artist_info' was added successfully."); } if (!columnExists(template, "auto_hide_play_queue", "user_settings")) { LOG.info("Database column 'user_settings.auto_hide_play_queue' not found. Creating it."); template.execute("alter table user_settings add auto_hide_play_queue boolean default true not null"); LOG.info("Database column 'user_settings.auto_hide_play_queue' was added successfully."); } if (!columnExists(template, "view_as_list", "user_settings")) { LOG.info("Database column 'user_settings.view_as_list' not found. Creating it."); template.execute("alter table user_settings add view_as_list boolean default false not null"); LOG.info("Database column 'user_settings.view_as_list' was added successfully."); } } }