diff options
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.doc.user/tasks017.htm')
-rw-r--r-- | jpa/plugins/org.eclipse.jpt.doc.user/tasks017.htm | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.doc.user/tasks017.htm b/jpa/plugins/org.eclipse.jpt.doc.user/tasks017.htm deleted file mode 100644 index 9c58f8a42b..0000000000 --- a/jpa/plugins/org.eclipse.jpt.doc.user/tasks017.htm +++ /dev/null @@ -1,146 +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> -<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>One-to-one mapping</title> -<meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1" /> -<meta name="date" content="2010-05-19T8:12:44Z" /> -<meta name="robots" content="noarchive" /> -<meta name="doctitle" content="One-to-one 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="BABFHBCJ" name="BABFHBCJ"></a></p> -<div class="sect2"><!-- infolevel="all" infotype="General" --> -<h1>One-to-one mapping</h1> -<p><a id="sthref144" name="sthref144"></a><a id="sthref145" name="sthref145"></a><a id="sthref146" name="sthref146"></a><a id="sthref147" name="sthref147"></a>Use a <span class="bold">One-to-One Mapping</span> to define a relationship with one-to-many multiplicity.</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 > One-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 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="41%" /> -<thead> -<tr align="left" valign="top"> -<th align="left" valign="bottom" id="r1c1-t25">Property</th> -<th align="left" valign="bottom" id="r1c2-t25">Description</th> -<th align="left" valign="bottom" id="r1c3-t25">Default</th> -</tr> -</thead> -<tbody> -<tr align="left" valign="top"> -<td align="left" id="r2c1-t25" headers="r1c1-t25">Mapped Entity Hyperlink</td> -<td align="left" headers="r2c1-t25 r1c2-t25">Defines mapping as <span class="bold">One-to-One</span>. This corresponds to the <code>@OneToOne</code> annotation.</td> -<td align="left" headers="r2c1-t25 r1c3-t25">One-to-One</td> -</tr> -<tr align="left" valign="top"> -<td align="left" id="r3c1-t25" headers="r1c1-t25">Target Entity</td> -<td align="left" headers="r3c1-t25 r1c2-t25">The entity to which this attribute is mapped.</td> -<td align="left" headers="r3c1-t25 r1c3-t25">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-t25" headers="r1c1-t25">Fetch Type</td> -<td align="left" headers="r4c1-t25 r1c2-t25">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-t25 r1c3-t25">Eager</td> -</tr> -<tr align="left" valign="top"> -<td align="left" id="r5c1-t25" headers="r1c1-t25">Mapped By</td> -<td align="left" headers="r5c1-t25 r1c2-t25">The database field that owns the relationship.</td> -<td align="left" headers="r5c1-t25 r1c3-t25"><br /></td> -</tr> -</tbody> -</table> -<br /></div> -<!-- class="inftblruleinformal" --></li> -<li> -<p>Use this table to complete the <a href="reference012.htm#CACFCEJC">Join Columns 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"> -<col width="19%" /> -<col width="*" /> -<col width="41%" /> -<thead> -<tr align="left" valign="top"> -<th align="left" valign="bottom" id="r1c1-t26">Property</th> -<th align="left" valign="bottom" id="r1c2-t26">Description</th> -<th align="left" valign="bottom" id="r1c3-t26">Default</th> -</tr> -</thead> -<tbody> -<tr align="left" valign="top"> -<td align="left" id="r2c1-t26" headers="r1c1-t26">Join Column</td> -<td align="left" headers="r2c1-t26 r1c2-t26"><a id="sthref148" name="sthref148"></a><a id="sthref149" name="sthref149"></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-t26 r1c3-t26">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"> -@OneToOne(targetEntity=<span class="italic"><TARGET_ENTITY></span>, cascade=CascadeType.<span class="italic"><CASCADE_TYPE></span>, - fetch = FetchType.<span class="italic"><FETCH_TYPE></span>, mappedBy = "<span class="italic"><MAPPED_BY></span>") -@JoinColumn(name="<span class="italic"><JOIN_COLUMN_NAME></span>", referencedColumnName= - "<span class="italic"><JOIN_COLUMN_REFERENCED_COLUMN></span>", insertable = <span class="italic"><INSERTABLE></span>, - updatable = <span class="italic"><UPDATABLE></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%"> -<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> |