| <!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 21, 2008 14:42:07 --> |
| <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> |
| <title>Inheritance information</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="Inheritance information" /> |
| <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" /> |
| <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="CACFHGHE" name="CACFHGHE"></a></p> |
| <div class="sect3"><!-- infolevel="all" infotype="General" --> |
| <h1>Inheritance information</h1> |
| <p><a id="sthref185" name="sthref185"></a><a id="sthref186" name="sthref186"></a>This table lists the fields available on the <span class="gui-object-title">Inheritance</span> area in the <span class="gui-object-title">JPA Details</span> view for each entity type.</p> |
| <div class="inftblruleinformal"> |
| <table class="RuleInformal" title="This table describes the options on the Persistence Properties view, Inheritance tab." summary="This table describes the options on the Persistence Properties view, Inheritance 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-t9">Property</th> |
| <th align="left" valign="bottom" id="r1c2-t9">Description</th> |
| <th align="left" valign="bottom" id="r1c3-t9">Default</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr align="left" valign="top"> |
| <td align="left" id="r2c1-t9" headers="r1c1-t9">Strategy</td> |
| <td align="left" headers="r2c1-t9 r1c2-t9">Specify the strategy to use when mapping a class or class hierarchy: |
| <ul> |
| <li> |
| <p>Single table – All classes in the hierarchy are mapped to a single table.</p> |
| </li> |
| <li> |
| <p>Joined – The root of the hierarchy is mapped to a single table; each child maps to its own table.</p> |
| </li> |
| <li> |
| <p>Table per class – Each class is mapped to a separate table.</p> |
| </li> |
| </ul> |
| </td> |
| <td align="left" headers="r2c1-t9 r1c3-t9">Single table</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t9" headers="r1c1-t9">Discriminator Column</td> |
| <td align="left" headers="r3c1-t9 r1c2-t9">Use to specify the name of the discriminator column when using a <span class="bold">Single</span> or <span class="bold">Joined</span> inheritance strategy.</td> |
| <td align="left" headers="r3c1-t9 r1c3-t9"><br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r4c1-t9" headers="r1c1-t9">Discriminator Type</td> |
| <td align="left" headers="r4c1-t9 r1c2-t9">Set this field to set the discriminator type to <code>Char</code> or <code>Integer</code> (instead of its default: <code>String</code>). The <span class="bold">Discriminator Value</span> must conform to this type.</td> |
| <td align="left" headers="r4c1-t9 r1c3-t9">String</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r5c1-t9" headers="r1c1-t9">Discriminator Value</td> |
| <td align="left" headers="r5c1-t9 r1c2-t9">Specify the discriminator value used to differentiate an entity in this inheritance hierarchy. The value must conform to the specified <span class="bold">Discriminator Type</span>.</td> |
| <td align="left" headers="r5c1-t9 r1c3-t9"><br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r6c1-t9" headers="r1c1-t9">Primary Key Join Columns</td> |
| <td align="left" headers="r6c1-t9 r1c2-t9">Use to override the default primary key join columns. Select <span class="bold">Override Default</span>, then click <span class="bold">Add</span> to select new Join Column. |
| <p>This field corresponds with @PrimaryKeyJoinColumn annotation.</p> |
| </td> |
| <td align="left" headers="r6c1-t9 r1c3-t9"><br /></td> |
| </tr> |
| </tbody> |
| </table> |
| <br /></div> |
| <!-- class="inftblruleinformal" --> |
| <p> </p> |
| <img src="img/ngrelt.png" alt="Related task" title="Related task" /><br /> |
| <br /> |
| <a href="task_inheritance.htm#CIHCCCJD">Specifying entity inheritance</a><br /> |
| <a href="task_add_persistence.htm#BABHICAI">Adding persistence to a class</a> |
| <p> </p> |
| <img src="img/ngrelr.png" alt="Related reference" title="Related reference" /><br /> |
| <br /> |
| <a href="ref_persistence_prop_view.htm#BABFAEBB">JPA Details view (for entities)</a></div> |
| <!-- class="sect3" --> |
| <!-- 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, 2008, Oracle. All rights reserved.</span></a></td> |
| </tr> |
| </table> |
| </div> |
| <!-- class="footer" --> |
| </body> |
| </html> |