Re: Record Level Access

[Mike.Barton@xxxxxxxxxxxx]

>I was wondering if there was a code snippet somewhere that does a basic
>record retrieval on a keyed file using an input field to get a specific
>record. The key on the file is a packed 5 digit field. I know I have to
>convert the input to BigDecimal .

>I guess what I am looking for is an equivalent of an RPG Chain.

Michael
     have a look at the attached code to give you an idea.

It has 2 file ORDHDRK and ORDDTLK both of which are keyed by
company number (2Alpha) and order number (6numeric).

The program chains to the header with a fixed company order number
(see "01",new java.math.BigDecimal(725075) }; bit)
& then reads all detail recods with matching key summing the
order quantity (ODQTYO) & order value (ODLVAL).

One of the problems i encountered was that the readnextequal method
worked similar to the RPG READE opcode but went beserk inasmuch as after
reading all matching records, zoomed off thu' the rest of the file.
For this reason, I have defined the CheckORDDTLKkey method which receives
the keys & decides whether the next order number has been read.
Not elegant but it works.

The code works ok up until it tries to move the summed fileds into the
label to present on the screen (never quite got this to work)

The code was extracted out of Borland JBuilder2 (hence the Decorated frame bit)

Mike


import java.awt.*;
import java.awt.event.*;
import java.math.*;
import com.ibm.as400.access.*;

public class ORDframe extends DecoratedFrame {

  AS400 as400;

  KeyedFile ORDHDRKfile;
  KeyedFile ORDDTLKfile;

  AS400FileRecordDescription ORDHDRKfileDesc;
  AS400FileRecordDescription ORDDTLKfileDesc;

  RecordFormat ORDHDRKrecformat[];
  RecordFormat ORDDTLKrecformat[];

  Record ORDHDR;
  Record ORDDTL;

  Object[] key;
  Object[] nokey = new Object[] { };

  TextField ODQTYO = new TextField();
  TextField ODLVAL = new TextField();
  Label label1 = new Label();
  Label label2 = new Label();

  public ORDframe() {
    try  {
      // Create an AS400 connection object.
      as400 = new AS400("YOUR400","USER","PASSWORD");

      // Create a file object.
      ORDHDRKfile = new KeyedFile(as400,"/qsys.lib/mspdta.lib/ORDHDRK.file");
      ORDDTLKfile = new KeyedFile(as400,"/qsys.lib/mspdta.lib/ORDDTLK.file");

      // Create a file ORDHDR description object.
      ORDHDRKfileDesc = new
AS400FileRecordDescription(as400,"/qsys.lib/mspdta.lib/ORDHDRK.file");
      ORDDTLKfileDesc = new
AS400FileRecordDescription(as400,"/qsys.lib/mspdta.lib/ORDDTLK.file");

      // Associate the ORDHDR format with the file object.
      ORDHDRKrecformat = ORDHDRKfileDesc.retrieveRecordFormat();
      ORDDTLKrecformat = ORDDTLKfileDesc.retrieveRecordFormat();

      // Associate the ORDHDR format with the file object.
      ORDHDRKfile.setRecordFormat(ORDHDRKrecformat[0]);
      ORDDTLKfile.setRecordFormat(ORDDTLKrecformat[0]);

      // Open the file.
      ORDHDRKfile.open(AS400File.READ_ONLY, 0,
AS400File.COMMIT_LOCK_LEVEL_NONE);
      ORDDTLKfile.open(AS400File.READ_ONLY, 0,
AS400File.COMMIT_LOCK_LEVEL_NONE);

      BigDecimal TotODQTYO = new BigDecimal(0);
      BigDecimal TotODLVAL = new BigDecimal(0);

      // Read a ORDHDR using the key array.
      key = new Object[] {"01",new java.math.BigDecimal(725075) };

      if ( (ORDHDR = ORDHDRKfile.read(key)) != null )
      {
        // Retrieve field values from the ORDDTL.

        ORDDTLKfile.positionCursorBefore(key);
        int eof = 0;
        while ( eof == 0 ) {
          if ((ORDDTL = ORDDTLKfile.readNextEqual(nokey)) != null) {

            if (( eof = CheckORDDTLKkey(key)) == 0) {
              TotODQTYO.add(new
BigDecimal(ORDDTL.getField("ODQTYO").toString()));
              TotODLVAL.add(new
BigDecimal(ORDDTL.getField("ODLVAL").toString()));
            }
          }
          else { eof = 1; }
        }
      }
      this.ODQTYO.setText(TotODQTYO.toString());
      this.ODLVAL.setText(TotODLVAL.toString());

     }
    catch (Exception e)
{(TotODLVAL.toString());L.getField("ODLVAL").toString()));/ORDDTLK.file");yed
      System.err.println("Exception error: " + e);
      e.printStackTrace();
    }
  }

  public int CheckORDDTLKkey(Object[] Keylist) {

      for (int i = 0 ; i<Keylist.length ; i++) {
        String keystring = new String(Keylist[i].toString());
        try {
          String filekeystring = new
String(ORDDTL.getField(ORDDTLKrecformat[0].getKeyFieldDescription(i).getFieldName().toString()).toString());
          if (! keystring.equals(filekeystring)) { return (1); }
        }
        catch (Exception e) {
          System.err.println("Exception error: " + e);
          e.printStackTrace();
          return(1);
        }
      }
      return(0);
    }

  public void CloseORDHDRK() {
      try {
      // Close the file.
      ORDHDRKfile.close();
      }
      catch (Exception e2) {
      System.err.println("Close file Error: " + e2);
      e2.printStackTrace();
    }
  }

  public void CloseORDDTLK() {
      try {
      // Close the file.
      ORDDTLKfile.close();
      }
      catch (Exception e2) {
      System.err.println("Close file Error: " + e2);
      e2.printStackTrace();
    }
  }

  void this_windowClosing(WindowEvent e) {

     // Close the file.
    CloseORDHDRK();
    CloseORDDTLK();
    System.exit(0);
  }
}


+---
| This is the JAVA/400 Mailing List!
| To submit a new message, send your mail to JAVA400-L@midrange.com.
| To subscribe to this list send email to JAVA400-L-SUB@midrange.com.
| To unsubscribe from this list send email to JAVA400-L-UNSUB@midrange.com.
| Questions should be directed to the list owner: joe@zappie.net
+---