blob: b27efd9c4947538e5d826aa67199e1e50d003446 (
plain) (
tree)
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<!-- Run date = May 3, 2007 9:19:10 -->
<meta name="OAC_IGNORE_SKIP_NAV" content="true" />
<title>Embedded ID mapping</title>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" />
<meta http-equiv="Content-Style-Type" content="text/css" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<meta name="generator" content="Oracle DARB XHTML Converter - Version 4.5.3 Build 02" />
<meta name="date" content="2005-07-10T12:57:20+08:00" />
<meta name="robots" content="all" scheme="http://www.robotstxt.org/" />
<meta name="doctitle" content="Embedded ID mapping" />
<meta name="relnum" content="Release 1.0.0" />
<meta name="partnum" content="" />
<link rel="copyright" href="dcommon/html/cpyr.htm" title="Copyright" type="text/html" />
<link rel="stylesheet" href="dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" />
<link rel="start" href="../../index.htm" title="Home" type="text/html" />
<link rel="contents" href="toc.htm" title="Contents" type="text/html" />
</head>
<body>
<p><a id="CIHDIAEE" name="CIHDIAEE"></a></p>
<div class="sect2"><!-- infolevel="all" infotype="General" -->
<table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%">
<tr valign="bottom">
<td align="left" width="86%">
<h1>Embedded ID mapping</h1>
</td>
</tr>
</table>
<p><a id="sthref118" name="sthref118"></a><a id="sthref119" name="sthref119"></a><a id="sthref120" name="sthref120"></a><a id="sthref121" name="sthref121"></a>Use an <span class="bold">Embedded ID Mapping</span> to specify the primary key of an embedded ID. These mappings may be used with a <a href="tasks005.htm#BABFEICE">Embeddable</a> entities.</p>
<ol type="1" start="1">
<li>
<p>In the <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a>, select the field to map. The <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a> displays the properties for the selected field.</p>
</li>
<li>
<p>In the <span class="gui-object-title">Map As</span> field, select <span class="gui-object-action">Embedded Id</span>.</p>
</li>
<li>
<p>Use this table to complete the remaining fields on the <span class="gui-object-title">JPA Details</span> view.</p>
<div class="inftblruleinformal">
<table class="RuleInformal" title="This table lists the fields in the Persistence Properties view for this mapping." summary="This table lists the fields in the Persistence Properties view for this mapping." dir="ltr" border="1" width="100%" frame="border" rules="all" cellpadding="3" cellspacing="0">
<thead>
<tr align="left" valign="top">
<th align="left" valign="bottom" id="r1c1-t5">Property</th>
<th align="left" valign="bottom" id="r1c2-t5">Description</th>
<th align="left" valign="bottom" id="r1c3-t5">Default</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t5" headers="r1c1-t5">Map As</td>
<td align="left" headers="r2c1-t5 r1c2-t5">Defines this mapping as a <span class="bold">Embedded Id</span>.
<p>This field corresponds to the <code>@EmbeddedId</code> annotation.</p>
</td>
<td align="left" headers="r2c1-t5 r1c3-t5">Embedded Id</td>
</tr>
</tbody>
</table>
<br /></div>
<!-- class="inftblruleinformal" --></li>
</ol>
<p>Eclipse adds the following annotations to the field:</p>
<pre xml:space="preserve" class="oac_no_warn">
@EmbeddedId
</pre>
<p> </p>
<img src="img/ngrelt.png" alt="Related task" title="Related task" /><br />
<br />
<a href="task_mapping.htm#BABDGBIJ">Mapping an entity</a>
<p> </p>
<img src="img/ngrelr.png" alt="Related reference" title="Related reference" /><br />
<br />
<a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a><br />
<a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a>
<p> </p>
<img src="img/ngrelc.png" alt="Related concept" title="Related concept" /><br />
<br />
<a href="concept_mapping.htm#BABBDJFI">Understanding OR mappings</a><br />
<a href="concepts001.htm#BABBGFJG">Understanding EJB 3.0 Java Persistence API</a></div>
<!-- class="sect2" -->
<!-- Start Footer -->
<div class="footer">
<table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%">
<tr>
<td align="left" width="86%"><a href="dcommon/html/cpyr.htm"><span class="copyrightlogo">Copyright © 2006, 2007, Oracle. All rights reserved.</span></a></td>
</tr>
</table>
</div>
<!-- class="footer" -->
</body>
</html>
|
