LightPIT: src/main/java/de/uapcore/lightpit/dao/postgres/PGUserDao.java@c759c60507a2

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  *

     4  * Copyright 2018 Mike Becker. All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions are met:

     8  *

     9  *   1. Redistributions of source code must retain the above copyright

    10  *      notice, this list of conditions and the following disclaimer.

    11  *

    12  *   2. Redistributions in binary form must reproduce the above copyright

    13  *      notice, this list of conditions and the following disclaimer in the

    14  *      documentation and/or other materials provided with the distribution.

    15  *

    16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    26  * POSSIBILITY OF SUCH DAMAGE.

    27  *

    28  */

    29 package de.uapcore.lightpit.dao.postgres;

    31 import de.uapcore.lightpit.dao.UserDao;

    32 import de.uapcore.lightpit.entities.User;

    34 import java.sql.Connection;

    35 import java.sql.PreparedStatement;

    36 import java.sql.ResultSet;

    37 import java.sql.SQLException;

    38 import java.util.ArrayList;

    39 import java.util.List;

    40 import java.util.Objects;

    42 import static de.uapcore.lightpit.dao.Functions.setStringOrNull;

    44 public final class PGUserDao implements UserDao {

    46     private final PreparedStatement insert, update, list, find;

    48     public PGUserDao(Connection connection) throws SQLException {

    49         list = connection.prepareStatement(

    50                 "select userid, username, lastname, givenname, mail " +

    51                         "from lpit_user where userid >= 0 " +

    52                         "order by username");

    53         find = connection.prepareStatement(

    54                 "select userid, username, lastname, givenname, mail " +

    55                         "from lpit_user where userid = ? ");

    57         insert = connection.prepareStatement("insert into lpit_user (username, lastname, givenname, mail) values (?, ?, ?, ?)");

    58         update = connection.prepareStatement("update lpit_user set lastname = ?, givenname = ?, mail = ? where userid = ?");

    59     }

    61     public User mapColumns(ResultSet result) throws SQLException {

    62         final int id = result.getInt("userid");

    63         if (id == 0) return null;

    64         final var user = new User(id);

    65         user.setUsername(result.getString("username"));

    66         user.setGivenname(result.getString("givenname"));

    67         user.setLastname(result.getString("lastname"));

    68         user.setMail(result.getString("mail"));

    69         return user;

    70     }

    72     @Override

    73     public void save(User instance) throws SQLException {

    74         Objects.requireNonNull(instance.getUsername());

    75         insert.setString(1, instance.getUsername());

    76         setStringOrNull(insert, 2, instance.getLastname());

    77         setStringOrNull(insert, 3, instance.getGivenname());

    78         setStringOrNull(insert, 4, instance.getMail());

    79         insert.executeUpdate();

    80     }

    82     @Override

    83     public boolean update(User instance) throws SQLException {

    84         setStringOrNull(update, 1, instance.getLastname());

    85         setStringOrNull(update, 2, instance.getGivenname());

    86         setStringOrNull(update, 3, instance.getMail());

    87         update.setInt(4, instance.getId());

    88         return update.executeUpdate() > 0;

    89     }

    91     @Override

    92     public List<User> list() throws SQLException {

    93         List<User> users = new ArrayList<>();

    94         try (var result = list.executeQuery()) {

    95             while (result.next()) {

    96                 users.add(mapColumns(result));

    97             }

    98         }

    99         return users;

   100     }

   102     @Override

   103     public User find(int id) throws SQLException {

   104         find.setInt(1, id);

   105         try (var result = find.executeQuery()) {

   106             if (result.next()) {

   107                 return mapColumns(result);

   108             } else {

   109                 return null;

   110             }

   111         }

   112     }

   113 }

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