Project works

pom.xml

@@ -4,15 +4,40 @@
          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>
+    <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>junit</groupId>
-        <artifactId>junit</artifactId>
-        <version>4.10</version>
-    </dependency>
-</dependencies>
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.12.3</version>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.18</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 </project>

src/main/java/MainApplication.java

@@ -0,0 +1,44 @@
+import com.mysql.cj.jdbc.Driver;
+import daos.Engine;
+import daos.PhoneRepository;
+import models.Phone;
+
+
+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
+ */
+public class MainApplication {
+
+    public static void main(String[] args) {
+        Engine engine = new Engine();
+        engine.registerJDBCDriver();
+        Connection mysqlDbConnection = engine.getConnection("mysql");
+        PhoneRepository phoneRepository = new PhoneRepository(mysqlDbConnection);
+        engine.executeStatement(mysqlDbConnection, "DROP DATABASE IF EXISTS walmart;");
+        engine.executeStatement(mysqlDbConnection, "CREATE DATABASE IF NOT EXISTS walmart;");
+        engine.executeStatement(mysqlDbConnection, "USE walmart;");
+        engine.executeStatement(mysqlDbConnection, new StringBuilder()
+                .append("CREATE TABLE IF NOT EXISTS walmart.phone(")
+                .append("id int auto_increment primary key,")
+                .append("name text not null,")
+                .append("color varchar(30) not null,")
+                .append("carrier varchar(30),")
+                .append("cameras int,")
+                .append("price int not null);")
+                .toString());
+
+        phoneRepository.create(new Phone(20, "ePhone", "'blue'", "'sprint'",3, 425.0));
+        phoneRepository.create(new Phone(21, "strawberry", "'red'", "'tmobile'", 3, 599.0));
+        System.out.println(phoneRepository.readAll());
+
+    }
+}

src/main/java/daos/Engine.java

@@ -0,0 +1,89 @@
+package daos;
+
+import com.mysql.cj.jdbc.Driver;
+
+import java.sql.*;
+import java.util.StringJoiner;
+
+public class Engine {
+
+    public Engine() {
+    }
+
+    public void registerJDBCDriver() {
+        // Attempt to register JDBC Driver
+        try {
+            DriverManager.registerDriver(Driver.class.newInstance());
+        } catch (InstantiationException | IllegalAccessException | SQLException e1) {
+            throw new RuntimeException(e1);
+        }
+    }
+
+    public Connection getConnection(String dbVendor) {
+        String username = "nathan";
+        String password = "greenLeaf1";
+        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 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);
+        }
+    }
+
+    public void executeStatement(Connection connection, String sqlStatement) {
+        try {
+            Statement statement = getScrollableStatement(connection);
+            statement.execute(sqlStatement);
+        } 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);
+                String forthColumnData = resultSet.getString(4);
+                String fifthColumnData = resultSet.getString(5);
+                String sixthColumnData = resultSet.getString(6);
+                System.out.println(new StringJoiner("\n")
+                        .add("Row number = " + rowNumber)
+                        .add("First Column = " + firstColumnData)
+                        .add("Second Column = " + secondColumnData)
+                        .add("Third column = " + thirdColumnData)
+                        .add("Forth column = " + forthColumnData)
+                        .add("Fifth column = " + fifthColumnData)
+                        .add("Sixth column = " + sixthColumnData));
+            }
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+    public ResultSet executeQuery(Connection connection, String sqlQuery) {
+        try {
+            Statement statement = getScrollableStatement(connection);
+            return statement.executeQuery(sqlQuery);
+        } catch (SQLException e) {
+            throw new Error(e);
+        }
+    }
+
+}

src/main/java/daos/PhoneRepository.java

@@ -0,0 +1,96 @@
+package daos;
+
+import models.Phone;
+
+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 PhoneRepository implements Repo {
+    private Connection connection;
+
+    public PhoneRepository(Connection connection) {
+        this.connection = connection;
+    }
+
+    @Override
+    public Connection getConnection() {
+        return connection;
+    }
+
+    public void create(Phone phone) {
+        executeStatement(String.format(new StringBuilder()
+                        .append("INSERT INTO walmart.phone(")
+                        .append("id, name, color, carrier, cameras, price)")
+                        .append("VALUES (%s, '%s', %s, %s, %s, %s);")
+                        .toString(),
+                phone.getId(),
+                phone.getName(),
+                phone.getColor(),
+                phone.getCarrier(),
+                phone.getCameras(),
+                phone.getPrice()));
+    }
+
+    public List<Phone> readAll() {
+        ResultSet resultSet = executeQuery("SELECT * FROM walmart.phone;");
+        List<Phone> list = new ArrayList<>();
+        try {
+            while (resultSet.next()) {
+                String id = resultSet.getString(1);
+                String name = resultSet.getString(2);
+                String color = resultSet.getString(3);
+                String carrier = resultSet.getString(4);
+                Integer cameras = resultSet.getInt(5);
+                Double price = resultSet.getDouble(6);
+                list.add(new Phone(
+                        Integer.parseInt(id),
+                        name,
+                        color,
+                        carrier,
+                        cameras,
+                        price));
+            }
+        } catch (SQLException throwables) {
+            throw new RuntimeException(throwables);
+        }
+        return list;
+    }
+
+    public Phone read(Integer phoneId) {
+        return readAll()
+                .stream()
+                .filter(phone -> phone.getId() == phoneId)
+                .findAny()
+                .get();
+    }
+
+    public void update(Integer id, Phone newPhone) {
+        executeStatement(new StringBuilder()
+            .append("UPDATE phone SET ")
+            .append("name = '" + newPhone.getName() + "'")
+            .append(", color = " + newPhone.getColor())
+            .append(", carrier = " + newPhone.getCarrier())
+            .append(", cameras = " + newPhone.getCameras().toString())
+            .append(", price = " + newPhone.getPrice().toString())
+            .append("WHERE id =" + id.toString()).toString());
+    }
+
+    public void delete(Integer id) {
+        executeStatement("DELETE FROM phone WHERE id = " + id.toString());
+    }
+
+    public void delete(Phone phone) {
+        executeStatement("DELETE FROM phone WHERE id = " + phone.getId().toString());
+    }
+
+
+
+}

src/main/java/daos/Repo.java

@@ -0,0 +1,45 @@
+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();
+}
+
+