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authornhauge2008-09-23 23:25:55 -0400
committernhauge2008-09-23 23:25:55 -0400
commit4a1176558e26b7ddd5ebe67488ca03e9abf3bb95 (patch)
tree14718d7f61efc91af3d3473e9c71ad222233a829 /jpa/plugins/org.eclipse.jpt.doc.user/tasks013.htm
parent3a86aa898ad95e4e77dd94936271200cb173b7cb (diff)
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-<!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 = July 23, 2008 8:59:46 -->
-<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" />
-<title>ID mapping</title>
-
-<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 (Mode = ohj/ohw) - Version 5.0" />
-<meta name="date" content="2005-07-10T12:57:20+08:00" />
-<meta name="robots" content="noarchive" />
-<meta name="doctitle" content="ID mapping" />
-<meta name="relnum" content="Release 2.0" />
-<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" />
-<!-- start-->
-<!-- contents -->
-</head>
-<body>
-<p><a id="BABGCBHG" name="BABGCBHG"></a></p>
-<div class="sect2"><!-- infolevel="all" infotype="General" -->
-<h1>ID mapping</h1>
-<p><a id="sthref109" name="sthref109"></a><a id="sthref110" name="sthref110"></a><a id="sthref111" name="sthref111"></a><a id="sthref112" name="sthref112"></a>Use an <span class="bold">ID Mapping</span> to specify the primary key of an entity. ID mappings may be used with a <a href="tasks006.htm#BABGBIEE">Entity</a> or <a href="tasks008.htm#BABDAGCI">Mapped superclass</a>. Each <a href="tasks006.htm#BABGBIEE">Entity</a> must have an ID mapping.</p>
-<ol start="1">
-<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 filed and then select <span class="bold">Map as &gt; ID</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 <a href="ref_mapping_general.htm#CACBHFIJ">General information</a> fields in 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-t18">Property</th>
-<th align="left" valign="bottom" id="r1c2-t18">Description</th>
-<th align="left" valign="bottom" id="r1c3-t18">Default</th>
-</tr>
-</thead>
-<tbody>
-<tr align="left" valign="top">
-<td align="left" id="r2c1-t18" headers="r1c1-t18">Entity Mapping Hyperlink</td>
-<td align="left" headers="r2c1-t18 r1c2-t18">Defines this mapping as an <span class="bold">ID Mapping</span>.
-<p>This field corresponds to the <code>@Id</code> annotation.</p>
-</td>
-<td align="left" headers="r2c1-t18 r1c3-t18">ID</td>
-</tr>
-<tr align="left" valign="top">
-<td align="left" id="r3c1-t18" headers="r1c1-t18">Column</td>
-<td align="left" headers="r3c1-t18 r1c2-t18">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-t18 r1c3-t18">By default, the Column is assumed to be named identically to the attribute.</td>
-</tr>
-<tr align="left" valign="top">
-<td align="left" id="r4c1-t18" headers="r1c1-t18">Table</td>
-<td align="left" headers="r4c1-t18 r1c2-t18">The database table mapped to the entity attribute.</td>
-<td align="left" headers="r4c1-t18 r1c3-t18">By default, the Table is assumed to be identical to the table associated with the entity.</td>
-</tr>
-<tr align="left" valign="top">
-<td align="left" id="r5c1-t18" headers="r1c1-t18">Temporal</td>
-<td align="left" headers="r5c1-t18 r1c2-t18">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-t18 r1c3-t18"><br /></td>
-</tr>
-</tbody>
-</table>
-<br /></div>
-<!-- class="inftblruleinformal" --></li>
-<li>
-<p>Use this table to complete the fields in <a href="ref_primary_key.htm#CACFCCAB">Primary Key Generation information</a> area in 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 PK Generation tab." summary="This table lists the fields in the PK Generation tab." 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-t19">Property</th>
-<th align="left" valign="bottom" id="r1c2-t19">Description</th>
-<th align="left" valign="bottom" id="r1c3-t19">Default</th>
-</tr>
-</thead>
-<tbody>
-<tr align="left" valign="top">
-<td align="left" id="r2c1-t19" headers="r1c1-t19">Primary Key Generation</td>
-<td align="left" headers="r2c1-t19 r1c2-t19">These fields define how the primary key is generated.</td>
-<td align="left" headers="r2c1-t19 r1c3-t19"><br /></td>
-</tr>
-<tr align="left" valign="top">
-<td align="left" id="r3c1-t19" headers="r1c1-t19">&nbsp;&nbsp;Strategy</td>
-<td align="left" headers="r3c1-t19 r1c2-t19">See <a href="ref_primary_key.htm#CACBAJBC">"Primary Key Generation"</a> for details.
-<ul>
-<li>
-<p>Auto</p>
-</li>
-<li>
-<p>Sequence</p>
-</li>
-<li>
-<p>Identity</p>
-</li>
-<li>
-<p>Table</p>
-</li>
-</ul>
-</td>
-<td align="left" headers="r3c1-t19 r1c3-t19">Auto</td>
-</tr>
-<tr align="left" valign="top">
-<td align="left" id="r4c1-t19" headers="r1c1-t19">&nbsp;&nbsp;Generator&nbsp;Name</td>
-<td align="left" headers="r4c1-t19 r1c2-t19">Name of the primary key generator specified in the <span class="bold">Strategy</span></td>
-<td align="left" headers="r4c1-t19 r1c3-t19"><br /></td>
-</tr>
-</tbody>
-</table>
-<br /></div>
-<!-- class="inftblruleinformal" --></li>
-</ol>
-<p>Additional fields will appear in the <a href="ref_primary_key.htm#CACFCCAB">Primary Key Generation information</a> area, depending on the selected Strategy. See <a href="ref_persistence_map_view.htm#BABIFBAF">"JPA Details view (for attributes)"</a> for additional information.</p>
-<p>Eclipse adds the following annotations to the field:</p>
-<pre xml:space="preserve" class="oac_no_warn">
-@Id
-@Column(name="<span class="italic">&lt;COLUMN_NAME&gt;</span>", table="<span class="italic">&lt;TABLE_NAME&gt;</span>", insertable=<span class="italic">&lt;INSERTABLE&gt;</span>,
- updatable=<span class="italic">&lt;UPDATABLE&gt;</span>)
-@Temporal(<span class="italic">&lt;TEMPORAL&gt;</span>)
-@GeneratedValue(strategy=GeneratorType.<span class="italic">&lt;STRATEGY&gt;</span>, generator="<span class="italic">&lt;GENERATOR_NAME&gt;</span>")@TableGenerator(name="<span class="italic">&lt;TABLE_GENERATOR_NAME&gt;</span>", table = "<span class="italic">&lt;TABLE_GENERATOR_TABLE&gt;</span>",
- pkColumnName = "<span class="italic">&lt;TABLE_GENERATOR_PK&gt;</span>",
- valueColumnName = "<span class="italic">&lt;TABLE_GENERATOR_VALUE_COLUMN&gt;</span>",
- pkColumnValue = "<span class="italic">&lt;TABLE_GENERATOR_PK_COLUMN_VALUE&gt;</span>")@SequenceGenerator(name="<span class="italic">&lt;SEQUENCE_GENERATOR_NAME&gt;</span>",
- sequenceName="<span class="italic">&lt;SEQUENCE_GENERATOR_SEQUENCE&gt;</span>")
-</pre>
-<p>&nbsp;</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>&nbsp;</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>&nbsp;</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&nbsp;&copy;&nbsp;2006, 2008,&nbsp;Oracle.&nbsp;All&nbsp;rights&nbsp;reserved.</span></a></td>
-</tr>
-</table>
-</div>
-<!-- class="footer" -->
-</body>
-</html>

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