first commit

pom.xml

@@ -8,6 +8,13 @@
     <artifactId>jv-jdbc-intro</artifactId>
     <version>1.0-SNAPSHOT</version>
 
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.32</version>
+        </dependency>
+    </dependencies>
     <properties>
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>

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

@@ -1,7 +1,28 @@
 package mate.academy;
 
+import java.math.BigDecimal;
+import mate.academy.dao.BookDao;
+import mate.academy.lib.Injector;
+import mate.academy.models.Book;
+
 public class Main {
+    private static final Injector injector = Injector.getInstance("mate.academy");
+
     public static void main(String[] args) {
+        BookDao bookDao = (BookDao) injector.getInstance(BookDao.class);
+
+        Book book = new Book();
+        book.setTitle("Kobzar");
+        book.setPrice(BigDecimal.valueOf(500));
+
+        Book book1 = bookDao.create(book);
+        book1.setPrice(BigDecimal.valueOf(700));
+        System.out.println(book1);
+        bookDao.update(book1);
+        System.out.println(bookDao.findById(book1.getId()));
+
+        bookDao.fingAll().forEach(System.out::println);
+        bookDao.fingAll().forEach(b -> bookDao.deleteById(b.getId()));
 
     }
 }

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

@@ -0,0 +1,18 @@
+package mate.academy.dao;
+
+import mate.academy.models.Book;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface BookDao {
+    Book create(Book book);
+
+    Optional<Book> findById(Long id);
+
+    List<Book> fingAll();
+
+    Book update(Book book);
+
+    boolean deleteById(Long id);
+}

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

@@ -0,0 +1,118 @@
+package mate.academy.dao;
+
+import java.math.BigDecimal;
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import mate.academy.lib.Dao;
+import mate.academy.lib.DataProcessingException;
+import mate.academy.models.Book;
+import mate.academy.util.ConnectionUtil;
+
+@Dao
+public class BookDaoImpl implements BookDao{
+    @Override
+    public Book create(Book book) {
+        String query = "INSERT INTO books(tittle, price) VALUES(?, ?)";
+        try (Connection connection = ConnectionUtil.getConnection();
+             PreparedStatement createBookStatement = connection
+                     .prepareStatement(query, Statement.RETURN_GENERATED_KEYS)) {
+            createBookStatement.setString(1, book.getTitle());
+            createBookStatement.setBigDecimal(2, book.getPrice());
+            createBookStatement.executeUpdate();
+            ResultSet generatedKeys = createBookStatement.getGeneratedKeys();
+            if (generatedKeys.next()) {
+                Long id = generatedKeys.getObject(1, Long.class);
+                book.setId(id);
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can`t insert book "
+                    + book + " to DB", e);
+        }
+        return book;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        String query = "SELECT * FROM books WHERE is_deleted = FALSE";
+        try (Connection connection = ConnectionUtil.getConnection();
+             PreparedStatement getAllBookStatement = connection
+                     .prepareStatement(query)) {
+            ResultSet resultSet = getAllBookStatement.executeQuery();
+            while (resultSet.next()) {
+                Long identifier = resultSet.getObject("id", Long.class);
+                if (Objects.equals(id, identifier)) {
+                    Book book = getBook(resultSet);
+                    return Optional.of(book);
+                }
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can`t get book with id = "
+                    + id + " from DB", e);
+        }
+        return Optional.empty();
+    }
+
+    @Override
+    public List<Book> fingAll() {
+        String query = "SELECT * FROM books WHERE is_deleted = FALSE";
+        List<Book> allBook = new ArrayList<>();
+        try (Connection connection = ConnectionUtil.getConnection();
+             PreparedStatement getAllBookStatement = connection
+                     .prepareStatement(query)) {
+            ResultSet resultSet = getAllBookStatement.executeQuery();
+            while (resultSet.next()) {
+                Book book = getBook(resultSet);
+                allBook.add(book);
+            }
+
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can`t get all manufacturers from DB", e);
+        }
+        return allBook;    }
+
+    @Override
+    public Book update(Book book) {
+        String query = "UPDATE books SET tittle = ?, price = ?  "
+                + "WHERE id = ? AND is_deleted = FALSE";
+        try (Connection connection = ConnectionUtil.getConnection();
+             PreparedStatement createBookStatement = connection
+                     .prepareStatement(query)) {
+            createBookStatement.setString(1, book.getTitle());
+            createBookStatement.setBigDecimal(2, book.getPrice());
+            createBookStatement.setLong(3, book.getId());
+            createBookStatement.executeUpdate();
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can`t update book "
+                    + book + " to DB", e);
+        }
+        return book;    }
+
+    @Override
+    public boolean deleteById(Long id) {
+        String query = "UPDATE books SET is_deleted = TRUE WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection();
+             PreparedStatement deleteBookStatement = connection
+                     .prepareStatement(query)) {
+            deleteBookStatement.setLong(1, id);
+            int updateRows = deleteBookStatement.executeUpdate();
+            return updateRows > 0;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can`t delete book with id "
+                    + id + " from DB", e);
+        }
+    }
+
+    private Book getBook(ResultSet resultSet) throws SQLException {
+        String tittle = resultSet.getString("tittle");
+        long price = resultSet.getLong("price");
+        Long id = resultSet.getObject("id", Long.class);
+        Book book = new Book();
+        book.setId(id);
+        book.setTitle(tittle);
+        book.setPrice(BigDecimal.valueOf(price));
+        return book;
+    }
+}

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

@@ -0,0 +1,11 @@
+package mate.academy.lib;
+
+public class DataProcessingException extends RuntimeException {
+    private String message;
+    private Throwable ex;
+
+    public DataProcessingException(String message, Throwable ex) {
+        this.message = message;
+        this.ex = ex;
+    }
+}

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

@@ -0,0 +1,59 @@
+package mate.academy.models;
+
+import java.math.BigDecimal;
+import java.util.Objects;
+
+public class Book {
+    private Long id;
+    private String title;
+    private BigDecimal price;
+
+    public Book() {
+    }
+
+    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 boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Book book = (Book) o;
+        return Objects.equals(id, book.id) && Objects.equals(title, book.title) && Objects.equals(price, book.price);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, title, price);
+    }
+
+    @Override
+    public String toString() {
+        return "Book{"
+                + "id=" + id
+                + ", title='" + title + '\''
+                + ", price=" + price
+                + '}';
+    }
+}

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

@@ -0,0 +1,30 @@
+package mate.academy.util;
+
+import mate.academy.lib.DataProcessingException;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class ConnectionUtil {
+    static {
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new DataProcessingException("Cant load JDBC driver for MySQL", e);
+        }
+    }
+
+    public static Connection getConnection() {
+        try {
+            Properties dbProperties = new Properties();
+            dbProperties.put("user", "root");
+            dbProperties.put("password", "admin");
+            return DriverManager.getConnection("jdbc:mysql://localhost:3306/library_db",
+                    dbProperties);
+        } catch (SQLException x) {
+            throw new DataProcessingException("Cant create connection to DB", x);
+        }
+    }
+}

src/main/resources/init_db.sql

@@ -0,0 +1,9 @@
+CREATE DATABASE `library_db` /*!40100 DEFAULT CHARACTER SET utf8mb3 */ /*!80016 DEFAULT ENCRYPTION='N' */;
+
+CREATE TABLE `books` (
+                                 `id` bigint NOT NULL AUTO_INCREMENT,
+                                 `tittle` varchar(255) DEFAULT NULL,
+                                 `price` bigint DEFAULT NULL,
+                                 `is_deleted` tinyint NOT NULL DEFAULT '0',
+                                 PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;