src/main/java/de/uapcore/lightpit/dao/postgres/PGUserDao.java

/*
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 *
 * Copyright 2018 Mike Becker. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 *      notice, this list of conditions and the following disclaimer.
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 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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package de.uapcore.lightpit.dao.postgres;

import de.uapcore.lightpit.dao.AbstractDao;
import de.uapcore.lightpit.dao.UserDao;
import de.uapcore.lightpit.entities.User;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Objects;

public final class PGUserDao extends AbstractDao<User> implements UserDao {

    private final PreparedStatement insert;
    private final PreparedStatement update;

    public PGUserDao(Connection connection) throws SQLException {
        super(connection.prepareStatement("select * from lpit_user where userid >= 0 order by username"));

        insert = connection.prepareStatement("insert into lpit_user (username, lastname, givenname, mail) values (?, ?, ?, ?)");
        update = connection.prepareStatement("update lpit_user set lastname = ?, givenname = ?, mail = ? where userid = ?");
    }

    @Override
    public User mapColumns(ResultSet result, String q) throws SQLException {
        final var user = new User(result.getInt(qual(q, "userid")));
        user.setUsername(result.getString(qual(q, "username")));
        user.setGivenname(result.getString(qual(q, "givenname")));
        user.setLastname(result.getString(qual(q, "lastname")));
        return user;
    }

    @Override
    public void save(User instance) throws SQLException {
        Objects.requireNonNull(instance.getUsername());
        insert.setString(1, instance.getUsername());
        setStringOrNull(insert, 2, instance.getLastname());
        setStringOrNull(insert, 3, instance.getGivenname());
        setStringOrNull(insert, 4, instance.getMail());
        insert.executeUpdate();
    }

    @Override
    public boolean update(User instance) throws SQLException {
        setStringOrNull(update, 1, instance.getLastname());
        setStringOrNull(update, 2, instance.getGivenname());
        setStringOrNull(update, 3, instance.getMail());
        update.setInt(4, instance.getUserID());
        return update.executeUpdate() > 0;
    }
}