package jdbc;

import java.sql.*;
import java.util.Scanner;

import com.sun.rowset.CachedRowSetImpl;

public class source {

    static void zad1() {
        System.out.println("||ZAD 1||");
        String connectionUrl = "jdbc:sqlserver://localhost:1433;"
                + "databaseName=Northwind;user=Laionik;password=lech";

        // Declare the JDBC objects.
        Connection con = null;
        Statement stmt = null;
        ResultSet rs = null;

        try {
            // Establish the connection.
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            con = DriverManager.getConnection(connectionUrl);

            // Create and execute an SQL statement that returns some data.
            String SQL = "SELECT * FROM Customers";
            stmt = con.createStatement();
            rs = stmt.executeQuery(SQL);

            // Iterate through the data in the result set and display it.
            while (rs.next()) {
                System.out.println(rs.getString("CompanyName") + ": "
                        + rs.getString("City") + " " + rs.getString("Country"));
            }
        }

        // Handle any errors that may have occurred.
        catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (rs != null)
                try {
                    rs.close();
                } catch (Exception e) {
                }
            if (stmt != null)
                try {
                    stmt.close();
                } catch (Exception e) {
                }
            if (con != null)
                try {
                    con.close();
                } catch (Exception e) {
                }
        }
    }

    @SuppressWarnings("resource")
    static void zad2() {
        System.out.println("\n\n||ZAD 2||");
        String connectionUrl = "jdbc:sqlserver://localhost:1433;"
                + "databaseName=Northwind;user=Laionik;password=lech";
        Scanner in = new Scanner(System.in);
        // Declare the JDBC objects.
        Connection con = null;
        Statement stmt = null;
        ResultSet rs = null;

        try {
            // Establish the connection.
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            con = DriverManager.getConnection(connectionUrl);

            // Create and execute an SQL statement that returns some data.
            System.out.println("Podaj kraj");

            String SQL = "SELECT * FROM Customers WHERE Country = ?";
            String param = in.nextLine();
            PreparedStatement preparedStatement = con.prepareStatement(SQL);
            preparedStatement.setString(1, param);
            rs = preparedStatement.executeQuery();
            while (rs.next()) {
                System.out.println(rs.getString("CompanyName") + ": "
                        + rs.getString("City") + " " + rs.getString("Country"));
            }

        }

        // Handle any errors that may have occurred.
        catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (rs != null)
                try {
                    rs.close();
                } catch (Exception e) {
                }
            if (stmt != null)
                try {
                    stmt.close();
                } catch (Exception e) {
                }
            if (con != null)
                try {
                    con.close();
                } catch (Exception e) {
                }
        }
    }

    @SuppressWarnings("resource")
    static void zad3() {
        System.out.println("\n\n||ZAD 3||");
        try
        {
            CachedRowSetImpl crs = new CachedRowSetImpl();

            crs.setUsername("Laionik");
            crs.setPassword("lech");
            crs.setUrl("jdbc:sqlserver://localhost:1433;databaseName=Northwind;");
            crs.setCommand("SELECT * FROM Customers");
            crs.execute();

            while (crs.next()) {
                System.out.println(crs.getString("CompanyName") + ": "
                        + crs.getString("City") + " "
                        + crs.getString("Country"));
            }

        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        // Declare the JDBC objects.
        zad1();
        zad2();
        zad3();
    }
}