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diff --git a/jpa/plugins/org.eclipse.jpt.doc.user/tasks015.htm b/jpa/plugins/org.eclipse.jpt.doc.user/tasks015.htm deleted file mode 100644 index b7943aaab5..0000000000 --- a/jpa/plugins/org.eclipse.jpt.doc.user/tasks015.htm +++ /dev/null @@ -1,160 +0,0 @@ -<!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 8:59:47 --> -<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> -<title>Many-to-one 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="Many-to-one 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="BABHFAFJ" name="BABHFAFJ"></a></p> -<div class="sect2"><!-- infolevel="all" infotype="General" --> -<h1>Many-to-one mapping</h1> -<p><a id="sthref117" name="sthref117"></a><a id="sthref118" name="sthref118"></a><a id="sthref119" name="sthref119"></a><a id="sthref120" name="sthref120"></a>Use a <span class="bold">Many-to-One</span> mapping to defines a single-valued association to another entity class that has many-to-one multiplicity.</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 field and then select <span class="bold">Map As > Many-to-One</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 JPA Details view.</p> -<div class="inftblruleinformal"> -<table class="RuleInformal" title="This table lists the fields ion the General tab for this mapping." summary="This table lists the fields ion the General tab 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-t22">Property</th> -<th align="left" valign="bottom" id="r1c2-t22">Description</th> -<th align="left" valign="bottom" id="r1c3-t22">Default</th> -</tr> -</thead> -<tbody> -<tr align="left" valign="top"> -<td align="left" id="r2c1-t22" headers="r1c1-t22">Mapping Entity Hyperlink</td> -<td align="left" headers="r2c1-t22 r1c2-t22">Defines mapping as <span class="bold">Many-to-One</span>. This corresponds to the <code>@ManyToOne</code> annotation.</td> -<td align="left" headers="r2c1-t22 r1c3-t22">Many-to-One</td> -</tr> -<tr align="left" valign="top"> -<td align="left" id="r3c1-t22" headers="r1c1-t22">Target Entity</td> -<td align="left" headers="r3c1-t22 r1c2-t22">The entity to which this attribute is mapped.</td> -<td align="left" headers="r3c1-t22 r1c3-t22">null -<p>You do not need to explicitly specify the target entity, since it can be inferred from the type of object being referenced.</p> -</td> -</tr> -<tr align="left" valign="top"> -<td align="left" id="r4c1-t22" headers="r1c1-t22">Fetch</td> -<td align="left" headers="r4c1-t22 r1c2-t22">Defines how data is loaded from the database. See <a href="ref_mapping_general.htm#CACGGGHB">"Fetch Type"</a> for details. -<ul> -<li> -<p>Eager</p> -</li> -<li> -<p>Lazy</p> -</li> -</ul> -</td> -<td align="left" headers="r4c1-t22 r1c3-t22">Eager</td> -</tr> -<tr align="left" valign="top"> -<td align="left" id="r5c1-t22" headers="r1c1-t22">Cascade</td> -<td align="left" headers="r5c1-t22 r1c2-t22">See <a href="ref_mapping_general.htm#CACJAIHB">"Cascade Type"</a> for details. -<ul> -<li> -<p>Default</p> -</li> -<li> -<p>All</p> -</li> -<li> -<p>Persist</p> -</li> -<li> -<p>Merge</p> -</li> -<li> -<p>Remove</p> -</li> -</ul> -</td> -<td align="left" headers="r5c1-t22 r1c3-t22">Default</td> -</tr> -<tr align="left" valign="top"> -<td align="left" id="r6c1-t22" headers="r1c1-t22">Optional</td> -<td align="left" headers="r6c1-t22 r1c2-t22">Specifies if this field is can be null.</td> -<td align="left" headers="r6c1-t22 r1c3-t22">Yes</td> -</tr> -</tbody> -</table> -<br /></div> -<!-- class="inftblruleinformal" --></li> -<li> -<p>Use this table to complete the fields on the <a href="reference015.htm#CACFCEJC">Join Columns Information</a> tab 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-t23">Property</th> -<th align="left" valign="bottom" id="r1c2-t23">Description</th> -<th align="left" valign="bottom" id="r1c3-t23">Default</th> -</tr> -</thead> -<tbody> -<tr align="left" valign="top"> -<td align="left" id="r2c1-t23" headers="r1c1-t23">Join Column</td> -<td align="left" headers="r2c1-t23 r1c2-t23"><a id="sthref121" name="sthref121"></a><a id="sthref122" name="sthref122"></a>Specify a mapped column for joining an entity association. This field corresponds to the <code>@JoinColum</code> attribute. -<p>Select <span class="bold">Override Default</span>, then Add, Edit, or Remove the join columns.</p> -</td> -<td align="left" headers="r2c1-t23 r1c3-t23">By default, the mapping is assumed to have a single join.</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"> -@JoinTable(joinColumns=@JoinColumn(name="<span class="italic"><JOIN_COLUMN></span>"), - name = "<span class="italic"><JOIN_TABLE_NAME></span>") -@ManyToOne(targetEntity=<span class="italic"><TARGET_ENTITY></span>, fetch=<span class="italic"><FETCH_TYPE></span>, - cascade=<span class="italic"><CASCADE_TYPE></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" --> -<!-- 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> |