Java tutorial
/* * Copyright (c) 2013 - 2015 <http://static-interface.de> and contributors * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package de.static_interface.reallifeplugin.module.contract.database.table; import de.static_interface.reallifeplugin.database.AbstractTable; import de.static_interface.reallifeplugin.database.Database; import de.static_interface.reallifeplugin.module.contract.database.row.ContractUserRow; import org.apache.commons.lang.Validate; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.UUID; public class ContractUsersTable extends AbstractTable<ContractUserRow> { public static final String TABLE_NAME = "contract_users"; public ContractUsersTable(Database db) { super(TABLE_NAME, db); } @Override public void create() throws SQLException { String sql; switch (db.getType()) { case H2: sql = "CREATE TABLE IF NOT EXISTS " + getName() + " (" + "id INT NOT NULL AUTO_INCREMENT PRIMARY KEY," + "uuid VARCHAR(36) NOT NULL" + ");"; break; case MYSQL: default: sql = "CREATE TABLE IF NOT EXISTS `" + getName() + "` (" + "`id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY," + "`uuid` VARCHAR(36) NOT NULL" + ");"; break; } PreparedStatement statement = db.getConnection().prepareStatement(sql); statement.executeUpdate(); statement.close(); } @Override public ResultSet serialize(ContractUserRow row) throws SQLException { Validate.notNull(row); if (row.id != null) { throw new IllegalArgumentException("Id should be null!"); } String sql = "INSERT INTO `{TABLE}` VALUES(NULL, ?);"; executeUpdate(sql, row.uuid.toString()); return executeQuery("SELECT * FROM `{TABLE}` ORDER BY id DESC LIMIT 1"); } @Override public ContractUserRow[] deserialize(ResultSet rs) throws SQLException { int rowcount = 0; if (rs.last()) { rowcount = rs.getRow(); rs.beforeFirst(); } ContractUserRow[] rows = new ContractUserRow[rowcount]; int i = 0; while (rs.next()) { ContractUserRow row = new ContractUserRow(); if (hasColumn(rs, "id")) { row.id = rs.getInt("id"); } if (hasColumn(rs, "uuid")) { row.uuid = UUID.fromString(rs.getString("uuid")); } rows[i] = row; i++; } return rows; } }