book DAO implementation

pom.xml

@@ -18,6 +18,14 @@
         </maven.checkstyle.plugin.configLocation>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.33</version>
+        </dependency>
+    </dependencies>
+
     <build>
         <plugins>
             <plugin>

src/main/java/mate/academy/Main.java

@@ -1,7 +1,30 @@
 package mate.academy;
 
+import java.math.BigDecimal;
+import mate.academy.dao.BookDao;
+import mate.academy.lib.Injector;
+import mate.academy.model.Book;
+
 public class Main {
+    private static final Injector injector = Injector.getInstance("mate.academy");
+    private static final BookDao bookDao = (BookDao) injector.getInstance(BookDao.class);
+
     public static void main(String[] args) {
+        Book book1 = new Book();
+        book1.setTitle("SQL for Data Analysis");
+        book1.setPrice(BigDecimal.valueOf(500));
+        book1 = bookDao.create(book1);
+        Book book2 = new Book();
+        book2.setTitle("Effective Java");
+        book2.setPrice(BigDecimal.valueOf(800));
+        book2 = bookDao.create(book2);
+        System.out.println(bookDao.findById(book2.getId()));
+        System.out.println(bookDao.getAll());
+        System.out.println(bookDao.delete(book1.getId()));
+        book2.setTitle("Joshua Bloch: Effective Java");
+        book2.setPrice(BigDecimal.valueOf(850));
+        bookDao.update(book2);
+        System.out.println(bookDao.getAll());
 
     }
 }

src/main/java/mate/academy/dao/BookDao.java

@@ -0,0 +1,17 @@
+package mate.academy.dao;
+
+import java.util.List;
+import java.util.Optional;
+import mate.academy.model.Book;
+
+public interface BookDao {
+    Book create(Book book);
+
+    Optional<Book> findById(Long id);
+
+    List<Book> getAll();
+
+    Book update(Book book);
+
+    boolean delete(Long id);
+}

src/main/java/mate/academy/dao/BookDaoImpl.java

@@ -0,0 +1,129 @@
+package mate.academy.dao;
+
+import java.math.BigDecimal;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import mate.academy.exceptions.DataProcessingException;
+import mate.academy.lib.Dao;
+import mate.academy.model.Book;
+import mate.academy.utils.ConnectionUtil;
+
+@Dao
+public class BookDaoImpl implements BookDao {
+    @Override
+    public Book create(Book book) {
+        String insertBookQuery = "INSERT INTO books (title, price) VALUES (?, ?);";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement = connection
+                        .prepareStatement(insertBookQuery, Statement.RETURN_GENERATED_KEYS)) {
+            statement.setString(1, book.getTitle());
+            statement.setBigDecimal(2, book.getPrice());
+            int affectedRows = statement.executeUpdate();
+            if (affectedRows < 1) {
+                throw new DataProcessingException("Excepted to insert at least one row, "
+                        + "but inserted 0 rows",
+                        new RuntimeException());
+            }
+            ResultSet generatedKeys = statement.getGeneratedKeys();
+            if (generatedKeys.next()) {
+                Long id = generatedKeys.getObject(1, Long.class);
+                book.setId(id);
+
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't create  book with title: "
+                    + book.getTitle()
+                    + ", and price: "
+                    + book.getPrice() + ":", e);
+        }
+        return book;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        String findBookQuery = "SELECT * from books WHERE id = ? AND is_deleted = FALSE;";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement = connection
+                        .prepareStatement(findBookQuery)) {
+            statement.setLong(1, id);
+            ResultSet resultSet = statement.executeQuery();
+            Book book = null;
+            if (resultSet.next()) {
+                book = getBookFromResultSet(resultSet);
+            }
+            return Optional.ofNullable(book);
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't find book from id " + id + ":", e);
+        }
+    }
+
+    @Override
+    public List<Book> getAll() {
+        List<Book> books = new ArrayList<>();
+        String getAllBookQuery = "SELECT * FROM books WHERE is_deleted = FALSE;";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement = connection
+                        .prepareStatement(getAllBookQuery)) {
+            ResultSet resultSet = statement.executeQuery();
+            while (resultSet.next()) {
+                books.add(getBookFromResultSet(resultSet));
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't get all books from DB:", e);
+        }
+        return books;
+    }
+
+    @Override
+    public Book update(Book book) {
+        String updateBookQuery =
+                "UPDATE books SET title = ?, price = ? WHERE id = ? AND is_deleted = FALSE;";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement = connection
+                        .prepareStatement(updateBookQuery)) {
+            statement.setString(1, book.getTitle());
+            statement.setBigDecimal(2, book.getPrice());
+            statement.setLong(3, book.getId());
+            int affectedRows = statement.executeUpdate();
+            if (affectedRows < 1) {
+                throw new DataProcessingException("Excepted to update at least one row, "
+                        + "but updated 0 rows:",
+                        new RuntimeException());
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't update book by id:" + book.getId(), e);
+        }
+        return book;
+    }
+
+    @Override
+    public boolean delete(Long id) {
+        String deleteBookQuery = "UPDATE books SET is_deleted = TRUE WHERE id = ?;";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement = connection
+                            .prepareStatement(deleteBookQuery)) {
+            statement.setLong(1, id);
+            int affectedRows = statement.executeUpdate();
+            return affectedRows > 0;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't delete book by id:" + id + ":", e);
+        }
+    }
+
+    private Book getBookFromResultSet(ResultSet resultSet) throws SQLException {
+        Long id = resultSet.getObject("id", Long.class);
+        String title = resultSet.getString("title");
+        BigDecimal price = resultSet.getBigDecimal("price");
+        Book book = new Book();
+        book.setId(id);
+        book.setTitle(title);
+        book.setPrice(price);
+        return book;
+    }
+}

src/main/java/mate/academy/exceptions/DataProcessingException.java

@@ -0,0 +1,7 @@
+package mate.academy.exceptions;
+
+public class DataProcessingException extends RuntimeException {
+    public DataProcessingException(String message, Throwable ex) {
+        super(message, ex);
+    }
+}

src/main/java/mate/academy/model/Book.java

@@ -0,0 +1,42 @@
+package mate.academy.model;
+
+import java.math.BigDecimal;
+
+public class Book {
+    private Long id;
+    private String title;
+    private BigDecimal price;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{"
+                + "id=" + id
+                + ", title='" + title + '\''
+                + ", price=" + price
+                + '}';
+    }
+}

src/main/java/mate/academy/resources/init_db.sql

@@ -0,0 +1,9 @@
+CREATE TABLE `books` (
+                         `id` bigint NOT NULL AUTO_INCREMENT,
+                         `title` varchar(45) DEFAULT NULL,
+                         `price` decimal(10,2) DEFAULT NULL,
+                         `is_deleted` bit(1) NOT NULL DEFAULT b'0',
+                         PRIMARY KEY (`id`),
+                         UNIQUE KEY `id_UNIQUE` (`id`)
+) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+

src/main/java/mate/academy/utils/ConnectionUtil.java

@@ -0,0 +1,29 @@
+package mate.academy.utils;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class ConnectionUtil {
+    private static final String USERNAME = "root";
+    private static final String PASSWORD = "12345678";
+    private static final String DB_URL = "jdbc:mysql://localhost:3306/library";
+    private static final String DRIVER_PACKAGE = "com.mysql.cj.jdbc.Driver";
+    private static final Properties DB_PROPERTIES;
+
+    static {
+        DB_PROPERTIES = new Properties();
+        DB_PROPERTIES.put("user", USERNAME);
+        DB_PROPERTIES.put("password", PASSWORD);
+        try {
+            Class.forName(DRIVER_PACKAGE);
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("Can not load JDBC driver :" + e);
+        }
+    }
+
+    public static Connection getConnection() throws SQLException {
+        return DriverManager.getConnection(DB_URL, DB_PROPERTIES);
+    }
+}