87 lines
4.8 KiB
HTML
87 lines
4.8 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="IFSFileInputStream" />
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<meta name="abstract" content="The IFSFileInputStream class represents an input stream for reading data from a file on the server." />
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<meta name="description" content="The IFSFileInputStream class represents an input stream for reading data from a file on the server." />
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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="ifsfis" />
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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>IFSFileInputStream</title>
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</head>
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<body id="ifsfis"><a name="ifsfis"><!-- --></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">IFSFileInputStream</h1>
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<div><p>The IFSFileInputStream class represents an input stream for reading
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data from a file on the server. </p>
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<div class="section"><p><a href="javadoc/com/ibm/as400/access/IFSFileInputStream.html#NAVBAR_TOP"> IFSFileInputStream</a></p>
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<p>As in the IFSFile class, methods
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exist in IFSFileInputStream that duplicate the methods in FileInputStream
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from the java.io package. In addition to these methods, IFSFileInputStream
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has additional methods specific to iSeries™ servers. The IFSFileInputStream
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class allows a Java™ program to do the following:</p>
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<ul><li><a href="javadoc/com/ibm/as400/access/IFSFileInputStream.html#CONSTRUCTOR_DETAIL"> Open</a> a file for reading. The file must exist since this
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class does not create files on the server. You can use a constructor that
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allows you to specify the file sharing mode.</li>
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<li>Determine the <a href="javadoc/com/ibm/as400/access/IFSFileInputStream.html#AVAILABLE()"> number of bytes</a> in the stream.</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFileInputStream.html#READ()"> Read</a> bytes from the stream.</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFileInputStream.html#SKIP(LONG)"> Skip</a> bytes in the stream.</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFileInputStream.html#LOCK(INT)"> Lock</a> or <a href="javadoc/com/ibm/as400/access/IFSFileInputStream.html#UNLOCK(COM.IBM.AS400.ACCESS.IFSKEY)"> unlock</a> bytes in the stream.</li>
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<li><a href="javadoc/com/ibm/as400/access/IFSFileInputStream.html#CLOSE()"> Close</a> the file.</li>
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</ul>
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<p>As in FileInputStream in java.io, this class allows a Java program
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to read a stream of bytes from the file. The Java program reads the bytes sequentially
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with only the additional option of skipping bytes in the stream.</p>
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<p>In
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addition to the methods in FileInputStream, IFSFileInputStream gives the Java program
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the following options:</p>
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<ul><li>Locking and unlocking bytes in the stream. See <a href="ifskey.htm#ifskey">IFSKey</a> for
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more information.</li>
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<li>Specifying a sharing mode when the file is opened. See <a href="ifsmode.htm#ifsmode">sharing
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modes</a> for more information.</li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">Example: Using IFSFileInputStream</h4><p>The following
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example shows how to use the IFSFileInputStream class.</p>
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<pre> // Create an AS400 object.
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AS400 sys = new AS400("mySystem.myCompany.com");
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// Open a file object that
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// represents the file.
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IFSFileInputStream aFile = new IFSFileInputStream(sys,"/mydir1/mydir2/myfile");
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// Determine the number of bytes in
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// the file.
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int available = aFile.available();
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// Allocate a buffer to hold the data
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byte[] data = new byte[10240];
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// Read the entire file 10K at a time
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for (int i = 0; i < available; i += 10240)
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{
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aFile.read(data);
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}
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// Close the file.
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aFile.close();</pre>
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</div>
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</div>
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</body>
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</html>
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