Arakne / Araknemu

 * This file is part of Araknemu.

 *

 * Araknemu is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Araknemu 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 Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with Araknemu.  If not, see <https://www.gnu.org/licenses/>.

 *

 * Copyright (c) 2017-2019 Vincent Quatrevieux

 */

package fr.quatrevieux.araknemu.core.dbal.executor;

import java.sql.PreparedStatement;

import java.sql.SQLException;

/**

 * Execute SQL queries

 */

public interface QueryExecutor {

    /**

     * Prepare SQL query

     *

     * executor.prepare("SELECT * FROM ACCOUNT WHERE ACCOUNT_ID = ?", stmt -> {

     *     stmt.setString(1, 123);

     *     ResultSet rs = stmt.executeQuery();

     *

     *     return load(rs);

     * }, false);

     *

     * @param sql SQL query to prepare

     * @param task Task to execute

     * @param returnGeneratedKeys Set true to return generated keys (like auto increment)

     * @param <T> The result type

     *

     * @return The result of the task

     *

     * @throws SQLException When error occurs during execution

     */

    /**

     * Prepare SQL query

     *

     * executor.prepare("SELECT * FROM ACCOUNT WHERE ACCOUNT_ID = ?", stmt -> {

     *     stmt.setString(1, 123);

     *     ResultSet rs = stmt.executeQuery();

     *

     *     return load(rs);

     * }, false);

     *

     * @param sql SQL query to prepare

     * @param task Task to execute

     * @param <T> The result type

     *

     * @return The result of the task

     *

     * @throws SQLException When error occurs during execution

     */

    public default <T> T prepare(String sql, PreparedTask<T> task) throws SQLException {

        return prepare(sql, task, false);

    }

    /**

     * Execute simple SQL query

     *

     * @param sql Query to execute

     *

     * @throws SQLException When error occurs during execution

     */

    public void query(String sql) throws SQLException;

    @FunctionalInterface

    public static interface PreparedTask<T> {

        public T execute(PreparedStatement statement) throws SQLException;

    }

}