121 lines
5.8 KiB
HTML
121 lines
5.8 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="SequentialFile" />
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<meta name="abstract" content="" />
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<meta name="description" content="" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rlaseq" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>SequentialFile</title>
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</head>
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<body id="rlaseq"><a name="rlaseq"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">SequentialFile</h1>
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<div><p></p>
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<div class="section"><p>The <a href="javadoc/com/ibm/as400/access/SequentialFile.html#NAVBAR_TOP"> SequentialFile</a> class gives a Java™ program access to a file on the server
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by record number. Methods exist to position the cursor, read, update, and
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delete records by record number.</p>
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</div>
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<div class="section"><p>To position the cursor, use the following methods:</p>
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</div>
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<div class="section"><ul><li><a href="javadoc/com/ibm/as400/access/SequentialFile.html#POSITIONCURSOR(INT)"> positionCursor(int)</a> - set cursor to the record with
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the specified record number.</li>
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<li><a href="javadoc/com/ibm/as400/access/SequentialFile.html#POSITIONCURSORAFTER(INT)"> positionCursorAfter(int)</a> - set cursor to the record
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after the specified record number.</li>
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<li><a href="javadoc/com/ibm/as400/access/SequentialFile.html#POSITIONCURSORBEFORE(INT)"> positionCursorBefore(int)</a> - set cursor to the record
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before the specified record number.</li>
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</ul>
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</div>
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<div class="section"><p>To delete a record, use the following method:</p>
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</div>
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<div class="section"><ul><li><a href="javadoc/com/ibm/as400/access/SequentialFile.html#DELETERECORD(INT)"> deleteRecord(int)</a> - delete the record with the specified
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record number.</li>
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</ul>
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</div>
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<div class="section"><p>To read a record, use the following methods:</p>
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</div>
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<div class="section"><ul><li><a href="javadoc/com/ibm/as400/access/SequentialFile.html#READ(INT)"> read(int)</a> - read the record with the specified record
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number.</li>
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<li><a href="javadoc/com/ibm/as400/access/SequentialFile.html#READAFTER(INT)"> readAfter(int)</a> - read the record after the specified
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record number.</li>
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<li><a href="javadoc/com/ibm/as400/access/SequentialFile.html#READBEFORE(INT)"> readBefore(int)</a> - read the record before the specified
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record number.</li>
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</ul>
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</div>
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<div class="section"><p>To update a record, use the following method:</p>
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</div>
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<div class="section"><ul><li><a href="javadoc/com/ibm/as400/access/SequentialFile.html#UPDATE(INT, COM.IBM.AS400.ACCESS.RECORD)"> update(int)</a> - update the record with the specified record
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number.</li>
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</ul>
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</div>
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<div class="section"><p>SequentialFile is a subclass of AS400File; all methods in AS400File
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are available to SequentialFile.</p>
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</div>
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<div class="section"><p>The following example shows how to use the SequentialFile class:</p>
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</div>
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<div class="section"><div class="p"><pre> // Create an AS400 object, the file exists on this
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// server.
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AS400 sys = new AS400("mySystem.myCompany.com");
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// Create a file object that represents the file
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SequentialFile myFile = new SequentialFile(sys, "/QSYS.LIB/MYLIB.LIB/MYFILE.FILE/%FILE%.MBR");
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// Assume that the AS400FileRecordDescription class
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// was used to generate the code for a subclass of
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// RecordFormat that represents the record format
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// of file MYFILE in library MYLIB. The code was
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// compiled and is available for use by the Java program.
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RecordFormat recordFormat = new MYFILEFormat();
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// Set the record format for myFile. This must
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// be done before invoking open()
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myFile.setRecordFormat(recordFormat);
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// Open the file.
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myFile.open(AS400File.READ_WRITE, 0, AS400File.COMMIT_LOCK_LEVEL_NONE);
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// Delete record number 2.
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myFile.delete(2);
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// Read record number 5 and update it
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Record updateRec = myFile.read(5);
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updateRec.setField("CUSTNAME", newName);
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// Use the base class' update() method since I am
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// already positioned on the record.
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myFile.update(updateRec);
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// Update record number 7
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updateRec.setField("CUSTNAME", nextNewName);
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updateRec.setField("CUSTNUM", new Integer(7));
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myFile.update(7, updateRec);
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....
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// Close the file since I am done using it
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myFile.close();
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// Disconnect since I am done using record-level access
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sys.disconnectService(AS400.RECORDACCESS);</pre>
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</div>
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</div>
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</div>
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</body>
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</html>
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