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| author | nhauge | 2007-05-04 19:55:48 +0000 |
|---|---|---|
| committer | nhauge | 2007-05-04 19:55:48 +0000 |
| commit | bc72d754f082fe30ef0d7aeff54f29c64553f02a (patch) | |
| tree | d69c3c3f38ea93ee78ce6d4529f80d928ee88030 /jpa/plugins/org.eclipse.jpt.doc.user/concept_mapping.htm | |
| parent | d8139fbb848c9509ae592b5477c85f5fd34b8ceb (diff) | |
| download | webtools.dali-bc72d754f082fe30ef0d7aeff54f29c64553f02a.tar.gz webtools.dali-bc72d754f082fe30ef0d7aeff54f29c64553f02a.tar.xz webtools.dali-bc72d754f082fe30ef0d7aeff54f29c64553f02a.zip | |
178911 - Initial check-in for user.doc plugin for Dali 1.0.
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.doc.user/concept_mapping.htm')
| -rw-r--r-- | jpa/plugins/org.eclipse.jpt.doc.user/concept_mapping.htm | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.doc.user/concept_mapping.htm b/jpa/plugins/org.eclipse.jpt.doc.user/concept_mapping.htm new file mode 100644 index 0000000000..d66eb6735b --- /dev/null +++ b/jpa/plugins/org.eclipse.jpt.doc.user/concept_mapping.htm @@ -0,0 +1,51 @@ +<!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 9:19:08 --> +<meta name="OAC_IGNORE_SKIP_NAV" content="true" /> +<title>Understanding OR mappings</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="Understanding OR mappings" /> +<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="BABBDJFI" name="BABBDJFI"></a></p> +<div class="sect1"> +<table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> +<tr valign="bottom"> +<td align="left" width="86%"> +<h1>Understanding OR mappings</h1> +</td> +</tr> +</table> +<p><a id="sthref44" name="sthref44"></a><a id="sthref45" name="sthref45"></a>The Dali OR (object-relational) Mapping Tool allows you to describe how your entity objects <span class="italic">map</span> to the data source (or other objects). This approach isolates persistence information from the object model–developers are free to design their ideal object model, and DBAs are free to design their ideal schema.</p> +<p>These mappings transform an object data member type to a corresponding relational database data source representation. These OR mappings can also transform object data members that reference other domain objects stored in other tables in the database and are related through foreign keys.</p> +<p>You can use these mappings to map simple data types including primitives (such as <code>int</code>), JDK classes (such as <code>String</code>), and large object (LOB) values. You can also use them to transform object data members that reference other domain objects by way of association where data source representations require object identity maintenance (such as sequencing and back references) and possess various types of multiplicity and navigability. The appropriate mapping class is chosen primarily by the cardinality of the relationship.</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> +</div> +<!-- class="sect1" --> +<!-- 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> |