86 lines
4.0 KiB
HTML
86 lines
4.0 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="DC.Type" content="reference" />
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<meta name="DC.Title" content="Conversion classes for composite types" />
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<meta name="abstract" content="Conversion classes for composite types are as follows." />
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<meta name="description" content="Conversion classes for composite types are as follows." />
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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.Identifier" content="dtadcomp" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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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>Conversion classes for composite types</title>
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</head>
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<body id="dtadcomp"><a name="dtadcomp"><!-- --></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">Conversion classes for composite types</h1>
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<div><p>Conversion classes for composite types are as follows.</p>
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<div class="section"><ul><li><a href="javadoc/com/ibm/as400/access/AS400Array.html#NAVBAR_TOP"> AS400Array</a> - Allows the Java™ program to work with an array of data
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types.</li>
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<li><a href="javadoc/com/ibm/as400/access/AS400Structure.html#NAVBAR_TOP"> AS400Structure</a> - Allows the Java program to work with a structure whose
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elements are data types.</li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">Example: Converting composite data types</h4><p>The following
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example shows conversion from a Java structure to a byte array and back
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again. The example assumes that the same data format is used for both sending
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and receiving data.</p>
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<pre> // Create a structure of data types that corresponds to a structure
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// that contains: - a four-byte number
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// - four bytes of pad
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// - an eight-byte number
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// - 40 characters
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AS400DataType[] myStruct =
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{
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new AS400Bin4(),
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new AS400ByteArray(4),
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new AS400Float8(),
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new AS400Text(40)
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};
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// Create a conversion object using the structure.
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AS400Structure myConverter = new AS400Structure(myStruct);
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// Create the Java object that holds the data to send to the server.
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Object[] myData =
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{
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new Integer(88), // the four-byte number
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new byte[0], // the pad (let the conversion object 0 pad)
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new Double(23.45), // the eight-byte floating point number
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"This is my structure" // the character string
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};
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// Convert from Java object to byte array.
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byte[] myAS400Data = myConverter.toBytes(myData);
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// ... send the byte array to the server. Get data back from the
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// server. The returned data will also be a byte array.
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// Convert the returned data from iSeries to Java format.
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Object[] myRoundTripData = (Object[])myConverter.toObject(myAS400Data,0);
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// Pull the third object out of the structure. This is the double.
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Double doubleObject = (Double) myRoundTripData[2];
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// Extract the simple Java type from the Java object.
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double d = doubleObject.doubleValue();</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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