blob: d33b7ab50851b33bdca7ee87b438d5a83d02a7b8 (
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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
<!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>Version mapping</title>
<meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1 Build 004" />
<meta name="date" content="2010-01-22T9:29:48Z" />
<meta name="robots" content="noarchive" />
<meta name="doctitle" content="Version mapping" />
<meta name="relnum" content="Release 2.3" />
<meta name="copyright" content="Copyright (c) 2000, 2008 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" />
<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" />
<!-- contents -->
</head>
<body>
<p><a id="BABHIBII" name="BABHIBII"></a></p>
<div class="sect2"><!-- infolevel="all" infotype="General" -->
<h1>Version mapping</h1>
<p><a id="sthref152" name="sthref152"></a><a id="sthref153" name="sthref153"></a><a id="sthref154" name="sthref154"></a><a id="sthref155" name="sthref155"></a>Use a <span class="bold">Version Mapping</span> to specify the field used for optimistic locking. If the entity is associated with multiple tables, you should use a version mapping only with the primary table. You should have only a single version mapping per persistent entity. Version mappings may be used only with the following attribute types:</p>
<ul>
<li>
<p><code>int</code></p>
</li>
<li>
<p><code>Integer</code></p>
</li>
<li>
<p><code>short, Short</code></p>
</li>
<li>
<p><code>long, Long</code></p>
</li>
<li>
<p><code>Timestamp</code></p>
</li>
</ul>
<p>To create a version mapping:</p>
<ol>
<li>
<p>In the <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a>, select the field to map.</p>
</li>
<li>
<p>Right-click the field and then select <span class="bold">Map As > Version</span>. The <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a> displays the properties for the selected.</p>
</li>
<li>
<p>Use this table to complete the remaining fields in the JPA Details 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">
<col width="19%" />
<col width="*" />
<col width="38%" />
<thead>
<tr align="left" valign="top">
<th align="left" valign="bottom" id="r1c1-t27">Property</th>
<th align="left" valign="bottom" id="r1c2-t27">Description</th>
<th align="left" valign="bottom" id="r1c3-t27">Default</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t27" headers="r1c1-t27">Mapped Entity Hyperlink</td>
<td align="left" headers="r2c1-t27 r1c2-t27">Defines the mapping as Version. This corresponds to the <code>@Version</code> annotation.</td>
<td align="left" headers="r2c1-t27 r1c3-t27">Version</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r3c1-t27" headers="r1c1-t27">Column</td>
<td align="left" headers="r3c1-t27 r1c2-t27">The database column mapped to the entity attribute. See <a href="ref_mapping_general.htm#CACGCBHB">"Column"</a> for details.</td>
<td align="left" headers="r3c1-t27 r1c3-t27">By default, the Column is assumed to be named identically to the attribute and always included in the <code>INSERT</code> and <code>UPDATE</code> statements.</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r4c1-t27" headers="r1c1-t27">Table</td>
<td align="left" headers="r4c1-t27 r1c2-t27">Name of the database table. This must be the primary table associated with the attribute's entity.</td>
<td align="left" headers="r4c1-t27 r1c3-t27"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r5c1-t27" headers="r1c1-t27">Temporal</td>
<td align="left" headers="r5c1-t27 r1c2-t27">Specifies the type of data. See <a href="ref_mapping_general.htm#CACEAJGD">"Temporal"</a> for details.
<ul>
<li>
<p>Date</p>
</li>
<li>
<p>Time</p>
</li>
<li>
<p>Timestamp</p>
</li>
</ul>
</td>
<td align="left" headers="r5c1-t27 r1c3-t27"><br /></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">
@Version
@Column(table="<span class="italic"><COLUMN_TABLE></span>", name="<<span class="italic">COLUMN_NAME</span>>")
</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" -->
<!-- class="sect1" -->
<!-- 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 © 2006, 2010, Oracle and/or its affiliates. All rights reserved.</span><br />
<a href="dcommon/html/cpyr.htm"><span class="copyrightlogo">Legal Notices</span></a></td>
</tr>
</table>
</div>
<!-- class="footer" -->
</body>
</html>
|
