package testing_sql_server;

import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class ExtraCredit1 extends JFrame {
   private Connection connection;
   private JTable table;

   public ExtraCredit1() //Constructor
   {
      // The URL specifying the local SQL Database server to which
      // this program connects using JDBC to connect to a
      // Microsoft ODBC database.
      // name of our server is SQLEXPRESS2008EXAMPLES
      String url = "jdbc:odbc:SQLEXPRESS2008EXAMPLES"; //local SQL Server
      String username = "sa";
      String password = "testing123";

      // Load the driver to allow connection to the database
      try {
         Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );

         connection = DriverManager.getConnection(
            url, username, password );
      }
      // catch exception if driver is not loaded correctly
      catch ( ClassNotFoundException cnfex ) {
         System.err.println(
            "Failed to load JDBC/ODBC driver." );
         cnfex.printStackTrace();
         System.exit( 1 );  // terminate program
      }
      // catch exception if problem with connection to the database
      catch ( SQLException sqlex ) {
         System.err.println( "Unable to connect" );
         sqlex.printStackTrace();
      }

      getTable(); //get the query result

      setSize( 450, 150 );  // set the size of the window
      show();   //show the window
   }

   private void getTable()
   {
      Statement statement;
      ResultSet resultSet;

      try {
         String query = "select sr.name, sr.phone from Sales_Rep sr, Car c where sr.name = c.seller and c.color = 'green';";

         statement = connection.createStatement();
         resultSet = statement.executeQuery( query );
         displayResultSet( resultSet );
         statement.close();
      }
      catch ( SQLException sqlex ) {
         sqlex.printStackTrace();
      }
   }

   private void displayResultSet( ResultSet rs )
      throws SQLException
   {
      // position to first record
      boolean moreRecords = rs.next();

      // If there are no records, display a message
      if ( ! moreRecords ) {
         JOptionPane.showMessageDialog( this,
            "ResultSet contained no records" );
         setTitle( "No records to display" );
         return;
      }

      setTitle( "Car Table from SQL HomeWork" );  //CHANGE THIS!!

      Vector columnHeads = new Vector();
      Vector rows = new Vector();

      try {
         // get column heads
         ResultSetMetaData rsmd = rs.getMetaData();

         for ( int i = 1; i <= rsmd.getColumnCount(); ++i )
            columnHeads.addElement( rsmd.getColumnName( i ) );

         // get row data
         do {
            rows.addElement( getNextRow( rs, rsmd ) );
         } while ( rs.next() );

         // display table with ResultSet contents
         table = new JTable( rows, columnHeads );
         JScrollPane scroller = new JScrollPane( table );
         getContentPane().add(
            scroller, BorderLayout.CENTER );
         validate();
      }
      catch ( SQLException sqlex ) {
         sqlex.printStackTrace();
      }
   }

   private Vector getNextRow( ResultSet rs,
                              ResultSetMetaData rsmd )
       throws SQLException
   {
      Vector currentRow = new Vector();

      for ( int i = 1; i <= rsmd.getColumnCount(); ++i )
         switch( rsmd.getColumnType( i ) ) {
            case Types.VARCHAR:
                  currentRow.addElement( rs.getString( i ) );
               break;
            case Types.INTEGER:
                  currentRow.addElement(
                     new Long( rs.getLong( i ) ) );
               break;
            default:
               System.out.println( "Type was: " +
                  rsmd.getColumnTypeName( i ) );
         }

      return currentRow;
   }

   public void shutDown()
   {
      try {
         connection.close();
      }
      catch ( SQLException sqlex ) {
         System.err.println( "Unable to disconnect" );
         sqlex.printStackTrace();
      }
   }

   public static void main( String args[] )
   {
      final ExtraCredit1 app = new ExtraCredit1();  //CHANGE THIS!

      app.addWindowListener(new WindowAdapter() {
            public void windowClosing( WindowEvent e )
            {
               app.shutDown();
               System.exit( 0 );
            }
         }
      );
   }
}