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diff --git a/jpa/plugins/org.eclipse.jpt.doc.user/tasks004.htm b/jpa/plugins/org.eclipse.jpt.doc.user/tasks004.htm new file mode 100644 index 0000000000..d2beafee6e --- /dev/null +++ b/jpa/plugins/org.eclipse.jpt.doc.user/tasks004.htm @@ -0,0 +1,79 @@ +<!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 9:19:09 --> +<meta name="OAC_IGNORE_SKIP_NAV" content="true" /> +<title>Entity</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="Entity" /> +<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="BABGBIEE" name="BABGBIEE"></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>Entity</h1> +</td> +</tr> +</table> +<p><a id="sthref76" name="sthref76"></a><a id="sthref77" name="sthref77"></a><a id="sthref78" name="sthref78"></a><a id="sthref79" name="sthref79"></a>An <span class="bold">Entity</span> is a persistent domain object.</p> +<p>An entity <span class="italic">can be</span>:</p> +<ul> +<li type="disc"> +<p>Abstract or concrete classes. Entities may also extend non-entity classes as well as entity classes, and non-entity classes may extend entity classes.</p> +</li> +</ul> +<p>An entity <span class="italic">must have</span>:</p> +<ul> +<li type="disc"> +<p>A no-arg constructor (public or protected); the entity class may have other constructors as well.</p> +</li> +</ul> +<p><a id="sthref80" name="sthref80"></a><a id="sthref81" name="sthref81"></a><a id="sthref82" name="sthref82"></a>Each persistent entity must be mapped to a database table and contain a primary key. Persistent entities are identified by the <code>@Entity</code> annotation.</p> +<p>Use this procedure to add persistence to an existing entity:</p> +<ol type="1" start="1"> +<li> +<p>Open the Java class in the <span class="gui-object-title">Package Explorer.</span></p> +</li> +<li> +<p>Select the class in the JPA Structure view.</p> +</li> +<li> +<p>In the <span class="gui-object-title">JPA Details</span> view, use the <span class="gui-object-action">Map As</span> field to select <span class="gui-object-action">Entity</span>.</p> +<div class="figure"><a id="sthref83" name="sthref83"></a> +<p class="titleinfigure">Selecting Entity Persistence</p> +<img src="img/persistence_view_entity.png" alt="Selecting entity persistence on the Persistence Properties view." title="Selecting entity persistence on the Persistence Properties view." /><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> +<p> </p> +<img src="img/ngrelt.png" alt="Related tasks" title="Related tasks" /><br /> +<br /> +<a href="task_add_persistence.htm#BABHICAI">Adding persistence to a class</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> |