| <!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>Mapping Privately Owned One-to-One Relationships | EclipseLink 2.7 EclipseLink MOXy</title> |
| <meta name="generator" content="Oracle DARB XHTML Converter (Mode = document) - Version 1.0.22 Build 1" /> |
| <meta name="date" content="2014-06-10T10:25:32Z" /> |
| <meta name="robots" content="noarchive" /> |
| <meta name="doctitle" content="Mapping Privately Owned One-to-One Relationships" /> |
| <meta name="relnum" content="Release 2.7" /> |
| <meta name="partnum" content="" /> |
| <link rel="stylesheet" type="text/css" href="../../dcommon/style.css" media="screen" /> |
| <link rel="copyright" href="../../dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> |
| <link rel="start" href="../../index.htm" title="Home" type="text/html" /> |
| <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> |
| <link rel="prev" href="privately_owned_relations.htm" title="Previous" type="text/html" /> |
| <link rel="next" href="privately_owned_relations002.htm" title="Next" type="text/html" /> |
| <!-- START: Disqus --><script type="text/javascript"> var disqus_developer = 0; </script><!-- END: Disqus --><!-- START: Sharethis --><script type="text/javascript">var switchTo5x=true;</script><script type="text/javascript" src="http://w.sharethis.com/button/buttons.js"></script><script type="text/javascript" src="http://s.sharethis.com/loader.js"></script> <!-- END: Sharethis --></head> |
| <body bgcolor="#FFFFFF"><iframe id="docheader" frameborder="0" framemargin="0" scrolling="no" src="../../dcommon/header.html"></iframe><script src="http://www.google.com/jsapi" type="text/javascript"></script><script type="text/javascript"> google.load('search', '1', {language : 'en'}); google.setOnLoadCallback(function() { var customSearchOptions = {}; var googleAnalyticsOptions = {}; googleAnalyticsOptions['queryParameter'] = 'q'; googleAnalyticsOptions['categoryParameter'] = ''; customSearchOptions['googleAnalyticsOptions'] = googleAnalyticsOptions; var customSearchControl = new google.search.CustomSearchControl( '016171230611334810008:1hjujor5_fg', customSearchOptions); customSearchControl.setResultSetSize(google.search.Search.FILTERED_CSE_RESULTSET); var options = new google.search.DrawOptions(); options.setSearchFormRoot('cse-search-form'); customSearchControl.draw('cse', options); }, true);</script><link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" /><div id="cse" style="width:100%;"></div> |
| <div class="header"><a id="top" name="top"></a> |
| <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> |
| <tr> |
| <td align="left" valign="top"><div class="booktitle">Developing JAXB Applications Using EclipseLink MOXy, |
| <b>Release 2.7</b><br /></font></td> |
| <td valign="bottom" align="right" width="144"> |
| <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> |
| <tr> |
| <td> </td> |
| <td align="center" valign="top"><a href="toc.htm"><img src="../../dcommon/images/contents.png" alt="Go To Table Of Contents" border="0" height="16" width="16" /><br /> |
| </td><td> </td><td align="center"><a href="../../" target="_top" class="external text" title="Search" rel="nofollow"><img src="../../dcommon/images/search.png" alt="Search" style="border:0;" /><br /><span class="mini"></span></a></td><td> </td><td align="center"><a href="../eclipselink_moxy.pdf" title="PDF" target="_blank"><img src="../../dcommon/images/pdf_icon.png" style="padding-right:5px;border:0" alt="PDF"></a></td> |
| </tr> |
| </table> |
| </td> |
| </tr> |
| </table> |
| <hr /> |
| <table class="navigation simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100" align="center"> |
| <tr> |
| <td align="center"><a href="privately_owned_relations.htm"><img src="../../dcommon/images/larrow.png" alt="Previous" border="0" height="16" width="16" /></a></td> |
| <td align="center"><a href="privately_owned_relations002.htm"><img src="../../dcommon/images/rarrow.png" alt="Next" border="0" height="16" width="16" /></a></td> |
| <td> </td> |
| </tr> |
| </table> |
| </div> |
| <!-- class="header" --> |
| <div class="ind"><!-- End Header --><a id="BABHAJID" name="BABHAJID"></a><a id="TLJAX324" name="TLJAX324"></a> |
| <div class="sect1"><!-- infolevel="all" infotype="General" --> |
| <h1 class="sect1"><font face="arial, helvetica, sans-serif" color="#330099">Mapping Privately Owned One-to-One Relationships</font></h1> |
| <p>This section demonstrates several ways to map a one-to-one relationship between objects. By default, one-to-one relationships are privately-owned in JAXB – their XML content will appear nested inside the owning element. For example, a <strong>Customer</strong> with a one-to-one mapping to a <strong>PhoneNumber</strong> would be marshalled as:</p> |
| <div class="example"><a id="TLJAX325" name="TLJAX325"></a><a id="sthref117" name="sthref117"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 6-1 Sample XML Mapping</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| <customer> |
| <name>Bob Smith</name> |
| <id>1982812</id> |
| <phone-number> |
| <area-code>613</area-code> |
| <number>5550210</number> |
| <extension>20016</extension> |
| </phone-number> |
| </customer> |
| |
| </pre></div> |
| <!-- class="example" --> |
| <a id="TLJAX326" name="TLJAX326"></a> |
| <div class="sect2"><a id="sthref118" name="sthref118"></a> |
| <h2 class="sect2"><font face="arial, helvetica, sans-serif" color="#330099">Mapping to an Element</font></h2> |
| <p>Given the XML schema in <a href="#BABEIBFB">Example 6-2</a>, <a href="#BABCHCJD">Figure 6-1</a> illustrates a one-to-one (1:1) relationship between two complex types.</p> |
| <div class="example"><a id="BABEIBFB" name="BABEIBFB"></a><a id="TLJAX327" name="TLJAX327"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 6-2 Sample XML Schema</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| <?xml version="1.0" encoding="UTF-8"?> |
| <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"> |
| |
| <xsd:element name="customer" type="customer-type"/> |
| |
| <xsd:complexType name="customer-type"> |
| <xsd:element name="phone-number" type="phone-type"/> |
| </xsd:complexType> |
| |
| <xsd:complexType name="phone-type"> |
| <xsd:element name="area-code" type="xsd:int"/> |
| <xsd:element name="number" type="xsd:int"/> |
| <xsd:element name="extension" type="xsd:int"/> |
| </xsd:complexType> |
| |
| </xsd:schema> |
| |
| </pre></div> |
| <!-- class="example" --> |
| <div class="figure"><a id="BABCHCJD" name="BABCHCJD"></a><a id="TLJAX328" name="TLJAX328"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Figure 6-1 One-to-one Relationship</font></em></strong></p> |
| <img src="img/onetoone.gif" alt="Description of Figure 6-1 follows" title="Description of Figure 6-1 follows" longdesc="img_text/onetoone.htm" /><br /> |
| <a id="sthref119" name="sthref119" href="img_text/onetoone.htm">Description of "Figure 6-1 One-to-one Relationship"</a><br /> |
| <br /></div> |
| <!-- class="figure" --> |
| <p><a href="#BABJIIGJ">Example 6-3</a> shows how to annotate your Java class to obtain this mapping with EclipseLink. The standard JAXB <code>@XmlElement</code> annotation can be used to indicate that the associated Java field should be mapped to an XML element.</p> |
| <div align="center"> |
| <div class="inftblnote"><br /> |
| <table class="Note oac_no_warn" summary="" border="1" width="80%" frame="hsides" rules="groups" cellpadding="3" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <p class="note"><img src="../../dcommon/images/note_icon.png" width="16" height="16" alt="Note" style="vertical-align:middle;padding-right:5px;" />Note:</p> |
| <p>By default, JAXB will assume all fields on your Java object are <code>@XmlElements</code>, so in many cases the annotation itself is not required. If, however, you want to customize the Java field's XML name, you can specify an <code>@XmlElement</code> annotation with a name argument.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <br /></div> |
| <!-- class="inftblnote" --></div> |
| <div class="example"><a id="BABJIIGJ" name="BABJIIGJ"></a><a id="TLJAX329" name="TLJAX329"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 6-3 Using the @XmlElement Annotation</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| package example; |
| |
| import javax.xml.bind.annotation.*; |
| |
| @XmlRootElement |
| @XmlAccessorType(XmlAccessType.FIELD) |
| public class Customer { |
| <strong>@XmlElement</strong>(name="phone-number") |
| private PhoneNumber phoneNumber; |
| |
| ... |
| } |
| |
| package example; |
| |
| import javax.xml.bind.annotation.*; |
| |
| @XmlAccessorType(XmlAccessType.FIELD) |
| public class PhoneNumber { |
| @XmlElement(name="area-code") |
| private Integer areaCode; |
| |
| private Integer number; |
| |
| private Integer extension; |
| |
| ... |
| } |
| |
| </pre></div> |
| <!-- class="example" --> |
| <p><a href="#BABBEIFJ">Example 6-4</a> shows how to define your mapping information in an EclipseLink's XML Bindings document.</p> |
| <div class="example"><a id="BABBEIFJ" name="BABBEIFJ"></a><a id="TLJAX330" name="TLJAX330"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 6-4 Sample XML Mapping</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| ... |
| <java-type name="Customer"> |
| <xml-root-element name="customer"/> |
| <java-attributes> |
| <xml-element java-attribute="phoneNumber" name="phone-number" type="PhoneNumber"/> |
| </java-attributes> |
| </java-type> |
| |
| <java-type name="PhoneNumber"> |
| <java-attributes> |
| <xml-value java-attribute="areaCode" name="area-code" type="java.lang.Integer"/> |
| <xml-value java-attribute="number" type="java.lang.Integer"/> |
| <xml-value java-attribute="extension" type="java.lang.Integer"/> |
| </java-attributes> |
| </java-type> |
| ... |
| |
| </pre></div> |
| <!-- class="example" --></div> |
| <!-- class="sect2" --> |
| <a id="TLJAX331" name="TLJAX331"></a> |
| <div class="sect2"><a id="sthref120" name="sthref120"></a> |
| <h2 class="sect2"><font face="arial, helvetica, sans-serif" color="#330099">Using EclipseLink's @XmlPath Annotation</font></h2> |
| <p>By default, your Java attributes will be mapped to XML based on their attributes Java name, or by a name specified in an <code>@XmlElement</code> annotation. This mapping is based on XPath, and EclipseLink's <code>@XmlPath</code> annotation allows you to customize this mapping. For example, you can use it to control the nesting of your elements in XML:</p> |
| <div class="example"><a id="TLJAX332" name="TLJAX332"></a><a id="sthref121" name="sthref121"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 6-5 Using the @XmlPath Annotation</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| package example; |
| |
| import javax.xml.bind.annotation.*; |
| import org.eclipse.persistence.oxm.annotations.*; |
| |
| @XmlRootElement |
| @XmlAccessorType(XmlAccessType.FIELD) |
| public class Customer { |
| <strong>@XmlPath</strong>("contact-info/phone-number") |
| private PhoneNumber phoneNumber; |
| |
| ... |
| } |
| |
| </pre></div> |
| <!-- class="example" --> |
| <div class="example"><a id="TLJAX333" name="TLJAX333"></a><a id="sthref122" name="sthref122"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 6-6 Using EclipseLink XML Bindings</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| ... |
| <java-type name="Customer"> |
| <xml-root-element name="customer"/> |
| <java-attributes> |
| <xml-element java-attribute="phoneNumber" name="phone-number" |
| type="PhoneNumber" xml-path="contact-info/phone-number"/> |
| </java-attributes> |
| </java-type> |
| ... |
| |
| </pre></div> |
| <!-- class="example" --> |
| <p>This will produce the following XML:</p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| <customer> |
| <contact-info> |
| <phone-number> |
| <number>555-631-2124</number> |
| </phone-number> |
| </contact-info> |
| </customer> |
| |
| </pre> |
| <p>You can also use <code>@XmlPath</code> to map to different occurrences of the same element in XML, by index. For example:</p> |
| <div class="example"><a id="TLJAX334" name="TLJAX334"></a><a id="sthref123" name="sthref123"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 6-7 Using the @XmlPath Annotation</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| package example; |
| |
| import javax.xml.bind.annotation.*; |
| import org.eclipse.persistence.oxm.annotations.*; |
| |
| @XmlRootElement |
| @XmlAccessorType(XmlAccessType.FIELD) |
| public class Customer { |
| @XmlPath("contact-info/phone[1]") |
| private PhoneNumber homePhone; |
| @XmlPath("contact-info/phone[2]") |
| private PhoneNumber workPhone; |
| ... |
| } |
| |
| </pre></div> |
| <!-- class="example" --> |
| <p>will produce the following XML:</p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| <customer> |
| <contact-info> |
| <phone> |
| <number>555-631-2124</number> |
| </phone> |
| <phone> |
| <number>555-631-8298</number> |
| </phone> |
| </contact-info> |
| </customer> |
| |
| </pre> |
| <p>For information on using XPath in your mappings, see <a href="advanced_concepts005.htm#CHDBFCAA">"Mapping Using XPath Predicates"</a>.</p> |
| </div> |
| <!-- class="sect2" --></div> |
| <!-- class="sect1" --></div> |
| <!-- class="ind" --> |
| <!-- Start Footer --> |
| <div class="footer"> |
| <hr /> |
| <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> |
| <col width="33%" /> |
| <col width="*" /> |
| <col width="33%" /> |
| <tr> |
| <td valign="bottom"> |
| <table class="navigation simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100" align="center"> |
| <col width="*" /> |
| <col width="48%" /> |
| <col width="48%" /> |
| <tr> |
| <td> </td> |
| <td align="center"><a href="privately_owned_relations.htm"><img src="../../dcommon/images/larrow.png" alt="Previous" border="0" height="16" width="16" /></a></td> |
| <td align="center"><a href="privately_owned_relations002.htm"><img src="../../dcommon/images/rarrow.png" alt="Next" border="0" height="16" width="16" /></a></td> |
| </tr> |
| </table> |
| </td> |
| <td align="center" width="34%"><a href="http://www.eclipse.org/eclipselink/" title="EclipseLink home"><img src="../../dcommon/images/ellogo.png" alt="EclipseLink" width="150" border="0" /></a><br /> |
| |
| |
| <td valign="bottom" align="right"> |
| <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="225"> |
| <tr> |
| <td> </td> |
| <td align="center" valign="top"><a href="toc.htm"><img src="../../dcommon/images/contents.png" alt="Go To Table Of Contents" border="0" height="16" width="16" /><br /> |
| </td><td> </td><td align="center"><a href="../../" target="_top" class="external text" title="Search" rel="nofollow"><img src="../../dcommon/images/search.png" alt="Search" style="border:0;" /><br /><span class="mini"></span></a></td><td> </td><td align="center"><a href="../eclipselink_moxy.pdf" title="PDF" target="_blank"><img src="../../dcommon/images/pdf_icon.png" style="padding-right:5px;border:0" alt="PDF"></a></td> |
| </tr> |
| </table> |
| </td> |
| </tr> |
| </table> |
| </div> |
| <!-- class="footer" --> |
| <div id="copyright">Copyright © 2013 by The Eclipse Foundation under the <a href="http://www.eclipse.org/org/documents/epl-v10.php">Eclipse Public License (EPL)</a><br /> <script type="text/javascript">var LastUpdated = document.lastModified;document.writeln ("Updated: " + LastUpdated);</script> </div><!-- START: Analytics --><script type="text/javascript"> var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-1608008-2']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); </script><!-- END: Analytics --><!-- START: Sharethis --><script>var options={ "publisher": "e2fe9e07-fab6-4f84-83ea-0991b429842c", "position": "right", "ad": { "visible": false, "openDelay": 5, "closeDelay": 0}};var st_hover_widget = new sharethis.widgets.hoverbuttons(options);</script><!-- END: Sharethis --></body> |
| </html> |
