Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: 7244fa132090be41f1ddc7990f628186425a457a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
<!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>
<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" />
<title>Embeddable</title>
<meta name="copyright" content="Copyright (c) 2000, 2009 oracle . All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html. Contributors: Oracle - initial API and implementation" />
<meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 1.0.11" />
<meta name="date" content="2012-10-11T7:52:5Z" />
<meta name="robots" content="noarchive" />
<meta name="doctitle" content="Embeddable" />
<meta name="relnum" content="Release 3.2" />
<meta name="partnum" content="Release 3.2" />
<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" />
</head>
<body>
<p class="betadraftsubtitle">Beta Draft: 2012-10-11</p>
<p><a id="BABFEICE" name="BABFEICE"></a></p>
<div class="sect2"><!-- infolevel="all" infotype="General" -->
<h1>Embeddable</h1>
<p><a id="sthref107" name="sthref107"></a><a id="sthref108" name="sthref108"></a>An <span class="bold">Embedded</span> class is a class whose instances are stored as part of an owning entity; it shares the identity of the owning entity. Each field of the embedded class is mapped to the database table associated with the owning entity.</p>
<p>To override the mapping information for a specific subclass, use the <code>@AttributeOverride</code> annotation for that specific class.</p>
<p><a id="sthref109" name="sthref109"></a><a id="sthref110" name="sthref110"></a><a id="sthref111" name="sthref111"></a>An embeddable entity is identified by the <code>@Embeddable</code> annotation.</p>
<p>Use this procedure to add embeddable persistence to an existing entity:</p>
<ol>
<li>
<p>Open the Java class in the <span class="gui-object-title">Project Explorer</span>.</p>
</li>
<li>
<p>Select the class in the JPA Structure view.</p>
</li>
<li>
<p>Click the mapping type hyperlink to open the <a href="reference073.htm#CACFEGAG">Mapping Type Selection dialog</a>.</p>
</li>
<li>
<p>Select <span class="bold">Embeddable</span> and then click <span class="bold">OK</span>.</p>
<div class="figure"><a id="sthref112" name="sthref112"></a>
<p class="titleinfigure">Mapping Type Selection Dialog (Embeddable)</p>
<img src="img/mapping_type_selection_embed.png" alt="The Mapping Type Selection dialog with Embeddable selected." title="The Mapping Type Selection dialog with Embeddable selected." /><br /></div>
<!-- class="figure" --></li>
<li>
<p>Complete the remaining <a href="ref_persistence_prop_view.htm#BABFAEBB">JPA Details view (for entities)</a>.</p>
</li>
</ol>
<a id="sthref113" name="sthref113"></a>
<p class="subhead2">Related reference</p>
<ul>
<li>
<p><a href="task_add_persistence.htm#BABHICAI">Adding persistence to a class</a></p>
</li>
<li>
<p><a href="task_additonal_tables.htm#CIHGBIEI">Specifying additional tables</a></p>
</li>
<li>
<p><a href="task_inheritance.htm#CIHCCCJD">Specifying entity inheritance</a></p>
</li>
</ul>
</div>
<!-- class="sect2" -->
<!-- Start Footer -->
<div class="footer">
<table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%">
<col width="86%" />
<col width="*" />
<tr>
<td align="left"><span class="copyrightlogo">Copyright&nbsp;&copy;&nbsp;2011, 2012,&nbsp;Oracle&nbsp;and/or&nbsp;its&nbsp;affiliates.&nbsp;All&nbsp;rights&nbsp;reserved.</span><br />
<a href="dcommon/html/cpyr.htm"><span class="copyrightlogo">Legal Notices</span></a></td>
</tr>
</table>
</div>
<!-- class="footer" -->
</body>
</html>

Back to the top