completed

pom.xml

@@ -4,15 +4,39 @@
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
-    <groupId>com.zipcoder.lab</groupId>
-    <artifactId>jdbcdao</artifactId>
+    <groupId>org.example</groupId>
+    <artifactId>intro-to-jdbc</artifactId>
     <version>1.0-SNAPSHOT</version>
 
-<dependencies>
-    <dependency>
-        <groupId>junit</groupId>
-        <artifactId>junit</artifactId>
-        <version>4.10</version>
-    </dependency>
-</dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.6.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.18</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-core</artifactId>
+            <version>2.13.0-rc1</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.13.0-rc1</version>
+        </dependency>
+    </dependencies>
 </project>

src/main/java/daos/CarRepo.java

@@ -0,0 +1,106 @@
+package daos;
+
+import models.Car;
+
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author git-leon
+ * @version 1.0.0
+ * @date 8/4/21 3:05 PM
+ */
+public class CarRepo implements Repo {
+    private Connection connection;
+
+    public CarRepo(Connection connection) {
+        this.connection = connection;
+    }
+
+    @Override
+    public Connection getConnection() {
+        return connection;
+    }
+
+    public void create(Car car) {
+        executeStatement(String.format(new StringBuilder()
+                        .append("INSERT INTO daolab.vehicle(")
+                        .append("primaryId, make, model, color, vtype, mpg) ")
+                        .append("VALUES (%s, '%s', '%s', '%s', '%s', %s);")
+                        .toString(),
+                car.getId(),
+                car.getMake(),
+                car.getModel(),
+                car.getColor(),
+                car.getvType(),
+                car.getMpg()));
+    }
+
+    public List<Car> readAll() {
+        ResultSet resultSet = executeQuery("SELECT * FROM daolab.vehicle;");
+        List<Car> list = new ArrayList<>();
+        try {
+            while (resultSet.next()) {
+                String id = resultSet.getString(1);
+                String make = resultSet.getString(2);
+                String model = resultSet.getString(3);
+                String color = resultSet.getString(4);
+                String vtype = resultSet.getString(5);
+                String mpg = resultSet.getString(6);
+                list.add(new Car(
+                        Long.parseLong(id),
+                        make,
+                        model,
+                        color,
+                        vtype,
+                        Integer.parseInt(mpg)));
+            }
+        } catch (SQLException throwables) {
+            throw new RuntimeException(throwables);
+        }
+        return list;
+    }
+
+    public Car read(Long primaryId) {
+        return readAll()
+                .stream()
+                .filter(car -> car.getId().equals(primaryId))
+                .findAny()
+                .get();
+    }
+
+    public void update(Long id, Car newCarData) {
+        executeStatement(String.format(new StringBuilder()
+                        .append("UPDATE vehicle SET make= '%s',")
+                        .append("model = '%s',")
+                        .append("color = '%s',")
+                        .append("vtype = '%s',")
+                        .append("mpg = %s ")
+                        .append("WHERE primaryId = %s;")
+                        .toString(),
+
+                newCarData.getMake(),
+                newCarData.getModel(),
+                newCarData.getColor(),
+                newCarData.getvType(),
+                newCarData.getMpg(),
+                id));
+    }
+
+    public void delete(Long id) {
+        executeStatement(String.format(new StringBuilder()
+                        .append("DELETE FROM vehicle ")
+                        .append("WHERE primaryId = %s;")
+                        .toString(),
+                id
+        ));
+    }
+
+    public void delete(Car car) {
+        delete(car.getId());
+    }
+
+}

src/main/java/daos/Main.java

@@ -0,0 +1,116 @@
+package daos;
+
+import com.mysql.cj.jdbc.Driver;
+import models.Car;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.StringJoiner;
+
+/**
+ * @author git-leon
+ * @version 1.0.0
+ * @date 8/2/21 9:49 AM
+ */
+class MainApplication {
+
+    public static void main(String[] args) {
+        registerJDBCDriver();
+        Connection mysqlDbConnection = getConnection("mysql");
+        CarRepo carRepo = new CarRepo(mysqlDbConnection);
+        executeStatement(mysqlDbConnection, "DROP DATABASE IF EXISTS daolab;");
+        executeStatement(mysqlDbConnection, "CREATE DATABASE IF NOT EXISTS daolab;");
+        executeStatement(mysqlDbConnection, "USE daolab;");
+        executeStatement(mysqlDbConnection, new StringBuilder()
+                .append("CREATE TABLE IF NOT EXISTS daolab.vehicle(")
+                .append("primaryId int auto_increment primary key,")
+                .append("make text not null,")
+                .append("model text not null,")
+                .append("color text not null,")
+                .append("vtype text not null,")
+                .append("mpg int not null);")
+                .toString());
+
+        Car car = new Car(12L, "Nissan", "Maxima", "Charcoal", "Car", 40 );
+        carRepo.create(car);
+        carRepo.create(new Car(13L, "Ford", "F150", "Blue", "Truck", 22 ));
+        carRepo.update(12L, new Car("Ford", "F150", "Blue", "Truck", 10 ));
+        carRepo.delete(car);
+        System.out.println(carRepo.readAll());
+
+    }
+
+    static ResultSet executeQuery(Connection connection, String sqlQuery) {
+        try {
+            Statement statement = getScrollableStatement(connection);
+            return statement.executeQuery(sqlQuery);
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    static void printResults(ResultSet resultSet) {
+        try {
+            for (int rowNumber = 0; resultSet.next(); rowNumber++) {
+                String firstColumnData = resultSet.getString(1);
+                String secondColumnData = resultSet.getString(2);
+                String thirdColumnData = resultSet.getString(3);
+                System.out.println(new StringJoiner("\n")
+                        .add("Row number = " + rowNumber)
+                        .add("First Column = " + firstColumnData)
+                        .add("Second Column = " + secondColumnData)
+                        .add("Third column = " + thirdColumnData));
+            }
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    static void executeStatement(Connection connection, String sqlStatement) {
+        try {
+            Statement statement = getScrollableStatement(connection);
+            statement.execute(sqlStatement);
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    static Statement getScrollableStatement(Connection connection) {
+        int resultSetType = ResultSet.TYPE_SCROLL_INSENSITIVE;
+        int resultSetConcurrency = ResultSet.CONCUR_READ_ONLY;
+        try { // scrollable statements can be iterated more than once without closing
+            return connection.createStatement(resultSetType, resultSetConcurrency);
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    static Connection getConnection(String dbVendor) {
+        String username = "carl";
+        String password = "carlpass";
+        String url = new StringBuilder()
+                .append("jdbc:")
+                .append(dbVendor)
+                .append("://127.0.0.1/")
+                .append("?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC")
+                .toString();
+        try {
+            return DriverManager.getConnection(url, username, password);
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    static void registerJDBCDriver() {
+        // Attempt to register JDBC Driver
+        try {
+            DriverManager.registerDriver(Driver.class.newInstance());
+        } catch (InstantiationException | IllegalAccessException | SQLException e1) {
+            throw new RuntimeException(e1);
+        }
+    }
+
+}

src/main/java/daos/Repo.java

@@ -0,0 +1,43 @@
+package daos;
+
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+/**
+ * @author git-leon
+ * @version 1.0.0
+ * @date 8/4/21 3:15 PM
+ */
+public interface Repo {
+    default void executeStatement(String sqlStatement) {
+        try {
+            Statement statement = getScrollableStatement();
+            statement.execute(sqlStatement);
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    default Statement getScrollableStatement() {
+        int resultSetType = ResultSet.TYPE_SCROLL_INSENSITIVE;
+        int resultSetConcurrency = ResultSet.CONCUR_READ_ONLY;
+        try { // scrollable statements can be iterated more than once without closing
+            return getConnection().createStatement(resultSetType, resultSetConcurrency);
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    default ResultSet executeQuery(String sqlQuery) {
+        try {
+            Statement statement = getScrollableStatement();
+            return statement.executeQuery(sqlQuery);
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    Connection getConnection();
+}