//
//   Source File Name: CustIn.java  1.3 
//  
//   Licensed Materials -- Property of IBM 
//  
//   (c) Copyright International Business Machines Corporation, 1999. 
//       All Rights Reserved. 
//  
//   US Government Users Restricted Rights - 
//   Use, duplication or disclosure restricted by 
//   GSA ADP Schedule Contract with IBM Corp. 
//  
//     PURPOSE : 
//   uses a prepared statement to INSERT data into customer table 
//  
//   Refer to the README file for instructions to run this sample. 

//  For more information on Programming in Java, refer to the  
//  "Programming in Java" section of the Application Development Guide. 

//  For more information on building and running Java programs for DB2, 
//  refer to the "Building Java Applets and Applications" section of the  
//  Application Building Guide. 

//  For more information on the SQL language, refer to the SQL Reference. 

import java.io.*;
import java.lang.*;
import java.sql.*;

class CustIn {

   static {
      try {
         //  register the driver with DriverManager 
         //  The newInstance() call is needed for the sample to work with 
         //  JDK 1.1.1 on OS/2, where the Class.forName() method does not 
         //  run the static initializer. For other JDKs, the newInstance 
         //  call can be omitted. 
         Class.forName("COM.ibm.db2.jdbc.app.DB2Driver").newInstance();
      } catch (Exception e) {
         e.printStackTrace();
      }
   }

   public static void main (String[] argv) {
      Connection con = null;
      int NUM_ENTRY = 25;
      try {
         //  connect to the server of user's choice 
         //  see Tools.class on Tools.DBConnect method 
         if (argv.length == 3)
         {  //  connect using command line arguments 
            con = Tools.DBConnect(argv[0], argv[1], argv[2]); 
         }
         else
         {  //  prompt user for database name, user ID, password 
            con = Tools.DBConnect(); 
         }
         con.setAutoCommit(false);

         int[] cust_Num = {
            10,  20,  30,  40,  50,  60,  70,  80,  90, 100,
            110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
            210, 220, 230, 240, 250,
         };
         //  will place all names into a string separated by commas 
         String firstNames = "EVA,EILEEN,THEODORE,VINCENZO,SEAN,DOLORES,HEATHER,BRUCE," +
            "ELIZABETH,MASATOSHI,MARILYN,JAMES,DAVID,WILLIAM,JENNIFER,JAMES,SALVATORE," +
	    "DANIEL,SYBIL,MARIA,ETHEL,JOHN,PHILIP,MAUDE,BILL";
         String lastNames = "SPENSER,LUCCHESI,O'CONNELL,QUINTANA,NICHOLLS,ADAMSON,PIANKA," +
	    "YOSHIMURA,SCOUTTEN,WALKER,BROWN,JONES,LUTZ,JEFFERSON,MARINO,SMITH,JOHNSON," +       
	    "PEREZ,SCHNEIDER,PARKER,SMITH,SETRIGHT,MEHTA,LEE,GOUNOT";
         //  use parsing method to place names into an array 
         String[] first_Name = parseStringIntoNames (firstNames, NUM_ENTRY);
         String[] last_Name = parseStringIntoNames (lastNames, NUM_ENTRY);

         insertDataIntoTable (con, cust_Num, first_Name, last_Name, NUM_ENTRY);

         System.out.println ("Inserted " + NUM_ENTRY + " Rows");

         //  disconnect from the connection made 
         System.out.println ("\n>Disconnecting...");
         con.commit();
         con.close();
      } catch (Exception e) { e.printStackTrace(); }
   }

   //  
   //  insertDataIntoTable 
   //     - inserts corresponding customer numbers, first and last names into 
   //       customer table 
   //  

   public static void insertDataIntoTable (Connection con, int[] custNum, String[] firstName, String[] lastName, int numEntry) {
      try {
         //  prepare statement to use in for loop 
         PreparedStatement pstmt = con.prepareStatement ("INSERT INTO CUSTOMER " +
	    "( Cust_Num, First_Name, Last_Name ) VALUES (?, ?, ?)");

         //  execute prepared statement for all names declared 
         for (int cnt = 0; cnt <= (numEntry-1); cnt = cnt + 1) {
            pstmt.setInt (1, custNum[cnt]);
            pstmt.setString (2, firstName[cnt]);
            pstmt.setString (3, lastName[cnt]);
            pstmt.executeUpdate();
         }
         pstmt.close();
      } catch (Exception e) { e.printStackTrace(); }
   }

   //  
   //  parseStringIntoNames 
   //     - runs through a list of comma separated names and places each name 
   //       into one node of an array 
   //  

   public static String[] parseStringIntoNames (String names, int numOfNames) {
      String[] nameList = new String[numOfNames];

      try {
         int startIndex = 0;
         int endIndex = 0;

         for (int cnt = 0; cnt <= (numOfNames-1); cnt = cnt + 1) {
            endIndex = names.indexOf(",", startIndex);
            if (endIndex < 0) { endIndex = names.length(); }
            nameList[cnt] = names.substring (startIndex, endIndex);
            startIndex = endIndex + 1;
         }
      } catch (Exception e) { e.printStackTrace(); }
      return nameList;
   }
}