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| author | nhauge | 2008-05-22 15:43:42 +0000 |
|---|---|---|
| committer | nhauge | 2008-05-22 15:43:42 +0000 |
| commit | f8afeae1e7e8d0c3f63887e84a366b91e5e674ae (patch) | |
| tree | 5443f0f4a4b2f74cf05e3e2efe839dc94f282505 /jpa/plugins/org.eclipse.jpt.doc.user/tasks013.htm | |
| parent | 9e6d53b0be6215d37fe1d4cee8a00fb3a21f6646 (diff) | |
| download | webtools.dali-f8afeae1e7e8d0c3f63887e84a366b91e5e674ae.tar.gz webtools.dali-f8afeae1e7e8d0c3f63887e84a366b91e5e674ae.tar.xz webtools.dali-f8afeae1e7e8d0c3f63887e84a366b91e5e674ae.zip | |
232870 - Documentation updates for 2.0.
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.doc.user/tasks013.htm')
| -rw-r--r-- | jpa/plugins/org.eclipse.jpt.doc.user/tasks013.htm | 137 |
1 files changed, 72 insertions, 65 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.doc.user/tasks013.htm b/jpa/plugins/org.eclipse.jpt.doc.user/tasks013.htm index 8218ffd209..7ff0a255dc 100644 --- a/jpa/plugins/org.eclipse.jpt.doc.user/tasks013.htm +++ b/jpa/plugins/org.eclipse.jpt.doc.user/tasks013.htm @@ -2,137 +2,144 @@ "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 = January 22, 2008 9:11:19 --> -<meta name="OAC_IGNORE_SKIP_NAV" content="true" /> +<!-- Run date = May 21, 2008 14:42:05 --> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> -<title>One-to-many mapping</title> +<title>ID 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="One-to-many mapping" /> -<meta name="relnum" content="M5 - Release 2.0.0" /> -<meta name="partnum" content="" /> +<meta name="doctitle" content="ID 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" /> <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="BABHGEBD" name="BABHGEBD"></a></p> +<p><a id="BABGCBHG" name="BABGCBHG"></a></p> <div class="sect2"><!-- infolevel="all" infotype="General" --> -<h1>One-to-many mapping</h1> -<p><a id="sthref140" name="sthref140"></a><a id="sthref141" name="sthref141"></a><a id="sthref142" name="sthref142"></a><a id="sthref143" name="sthref143"></a>Use a <span class="bold">One-to-Many Mapping</span> to define a relationship with one-to-many multiplicity.</p> +<h1>ID mapping</h1> +<p><a id="sthref107" name="sthref107"></a><a id="sthref108" name="sthref108"></a><a id="sthref109" name="sthref109"></a><a id="sthref110" name="sthref110"></a>Use an <span class="bold">ID Mapping</span> to specify the primary key of an entity. ID mappings may be used with a <a href="tasks006.htm#BABGBIEE">Entity</a> or <a href="tasks008.htm#BABDAGCI">Mapped superclass</a>. Each <a href="tasks006.htm#BABGBIEE">Entity</a> must have an ID mapping.</p> <ol start="1"> <li> -<p>In the <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a>, select the field to map. The <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a> displays the properties for the selected.</p> +<p>In the <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a>, select the field to map.</p> </li> <li> -<p>In the <span class="gui-object-title">Map As</span> field, select <span class="gui-object-action">One-to-many</span>.</p> +<p>Right click the filed and then select <span class="bold">Map as > ID</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> +<p>Use this table to complete the <a href="ref_mapping_general.htm#CACBHFIJ">General 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 General tab of the Persistence Properties view for this mapping." summary="This table lists the fields in the General tab of the Persistence Properties view for this mapping." dir="ltr" border="1" width="100%" frame="border" rules="all" cellpadding="3" cellspacing="0"> +<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-t13">Property</th> -<th align="left" valign="bottom" id="r1c2-t13">Description</th> -<th align="left" valign="bottom" id="r1c3-t13">Default</th> +<th align="left" valign="bottom" id="r1c1-t18">Property</th> +<th align="left" valign="bottom" id="r1c2-t18">Description</th> +<th align="left" valign="bottom" id="r1c3-t18">Default</th> </tr> </thead> <tbody> <tr align="left" valign="top"> -<td align="left" id="r2c1-t13" headers="r1c1-t13">Target Entity</td> -<td align="left" headers="r2c1-t13 r1c2-t13">The entity to which this attribute is mapped.</td> -<td align="left" headers="r2c1-t13 r1c3-t13"><br /></td> +<td align="left" id="r2c1-t18" headers="r1c1-t18">Entity Mapping Hyperlink</td> +<td align="left" headers="r2c1-t18 r1c2-t18">Defines this mapping as an <span class="bold">ID Mapping</span>. +<p>This field corresponds to the <code>@Id</code> annotation.</p> +</td> +<td align="left" headers="r2c1-t18 r1c3-t18">ID</td> </tr> <tr align="left" valign="top"> -<td align="left" id="r3c1-t13" headers="r1c1-t13">Fetch Type</td> -<td align="left" headers="r3c1-t13 r1c2-t13">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="r3c1-t13 r1c3-t13">Eager</td> +<td align="left" id="r3c1-t18" headers="r1c1-t18">Column</td> +<td align="left" headers="r3c1-t18 r1c2-t18">The database column mapped to the entity attribute. See <a href="ref_mapping_general.htm#CACGCBHB">"Column"</a> for details.</td> +<td align="left" headers="r3c1-t18 r1c3-t18">By default, the Column is assumed to be named identically to the attribute.</td> </tr> <tr align="left" valign="top"> -<td align="left" id="r4c1-t13" headers="r1c1-t13">Mapped By</td> -<td align="left" headers="r4c1-t13 r1c2-t13">The database field that owns the relationship.</td> -<td align="left" headers="r4c1-t13 r1c3-t13"><br /></td> +<td align="left" id="r4c1-t18" headers="r1c1-t18">Table</td> +<td align="left" headers="r4c1-t18 r1c2-t18">The database table mapped to the entity attribute.</td> +<td align="left" headers="r4c1-t18 r1c3-t18">By default, the Table is assumed to be identical to the table associated with the entity.</td> </tr> <tr align="left" valign="top"> -<td align="left" id="r5c1-t13" headers="r1c1-t13">Order By</td> -<td align="left" headers="r5c1-t13 r1c2-t13">Specify the default order for objects returned from a query. See <a href="ref_mapping_general.htm#CACDADIH">"Order By"</a> for details. +<td align="left" id="r5c1-t18" headers="r1c1-t18">Temporal</td> +<td align="left" headers="r5c1-t18 r1c2-t18">Specifies the type of data. See <a href="ref_mapping_general.htm#CACEAJGD">"Temporal"</a> for details. <ul> <li> -<p>No ordering</p> +<p>Date</p> </li> <li> -<p>Primary key</p> +<p>Time</p> </li> <li> -<p>Custom</p> +<p>Timestamp</p> </li> </ul> </td> -<td align="left" headers="r5c1-t13 r1c3-t13">No ordering</td> +<td align="left" headers="r5c1-t18 r1c3-t18"><br /></td> </tr> </tbody> </table> <br /></div> <!-- class="inftblruleinformal" --></li> <li> -<p>Use this table to complete the <a href="reference007.htm#CACBAEBC">Join Table Information</a> fields in the JPA Details view.</p> +<p>Use this table to complete the fields in <a href="ref_primary_key.htm#CACFCCAB">Primary Key Generation information</a> area 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 Join Table tab of the Persistence Properties view for this mapping." summary="This table lists the fields in the Join Table tab of the Persistence Properties view for this mapping." dir="ltr" border="1" width="100%" frame="border" rules="all" cellpadding="3" cellspacing="0"> +<table class="RuleInformal" title="This table lists the fields in the PK Generation tab." summary="This table lists the fields in the PK Generation 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-t14">Property</th> -<th align="left" valign="bottom" id="r1c2-t14">Description</th> -<th align="left" valign="bottom" id="r1c3-t14">Default</th> +<th align="left" valign="bottom" id="r1c1-t19">Property</th> +<th align="left" valign="bottom" id="r1c2-t19">Description</th> +<th align="left" valign="bottom" id="r1c3-t19">Default</th> </tr> </thead> <tbody> <tr align="left" valign="top"> -<td align="left" id="r2c1-t14" headers="r1c1-t14">Name</td> -<td align="left" headers="r2c1-t14 r1c2-t14">Name of the join table</td> -<td align="left" headers="r2c1-t14 r1c3-t14">By default, the name is assumed to be the primary tables associated with the entities concatenated with an underscore.</td> +<td align="left" id="r2c1-t19" headers="r1c1-t19">Primary Key Generation</td> +<td align="left" headers="r2c1-t19 r1c2-t19">These fields define how the primary key is generated.</td> +<td align="left" headers="r2c1-t19 r1c3-t19"><br /></td> </tr> <tr align="left" valign="top"> -<td align="left" id="r3c1-t14" headers="r1c1-t14">Join Columns</td> -<td align="left" headers="r3c1-t14 r1c2-t14">Specify two or more join columns (that is, a primary key).</td> -<td align="left" headers="r3c1-t14 r1c3-t14"><br /></td> +<td align="left" id="r3c1-t19" headers="r1c1-t19"> Strategy</td> +<td align="left" headers="r3c1-t19 r1c2-t19">See <a href="ref_primary_key.htm#CACBAJBC">"Primary Key Generation"</a> for details. +<ul> +<li> +<p>Auto</p> +</li> +<li> +<p>Sequence</p> +</li> +<li> +<p>Identity</p> +</li> +<li> +<p>Table</p> +</li> +</ul> +</td> +<td align="left" headers="r3c1-t19 r1c3-t19">Auto</td> </tr> <tr align="left" valign="top"> -<td align="left" id="r4c1-t14" headers="r1c1-t14">Inverse Join Columns</td> -<td align="left" headers="r4c1-t14 r1c2-t14">The join column on the owned (or inverse) side of the association: the owned entity's primary key column.</td> -<td align="left" headers="r4c1-t14 r1c3-t14"><br /></td> +<td align="left" id="r4c1-t19" headers="r1c1-t19"> Generator Name</td> +<td align="left" headers="r4c1-t19 r1c2-t19">Name of the primary key generator specified in the <span class="bold">Strategy</span></td> +<td align="left" headers="r4c1-t19 r1c3-t19"><br /></td> </tr> </tbody> </table> <br /></div> <!-- class="inftblruleinformal" --></li> </ol> +<p>Additional fields will appear in the <a href="ref_primary_key.htm#CACFCCAB">Primary Key Generation information</a> area, depending on the selected Strategy. See <a href="ref_persistence_map_view.htm#BABIFBAF">"JPA Details view (for attributes)"</a> for additional information.</p> <p>Eclipse adds the following annotations to the field:</p> <pre xml:space="preserve" class="oac_no_warn"> -@OneToMany(targetEntity=<span class="italic"><TARGET_ENTITY></span>) -@Column(name="<span class="italic"><COLUMN></span>") - - -@OneToMany(targetEntity=<span class="italic"><TARGET_ENTITY></span>.class, cascade=CascadeType.<span class="italic"><CASCADE_TYPE></span>, - fetch = FetchType.<span class="italic"><FETCH_TYPE></span>, mappedBy = "<span class="italic"><MAPPED_BY></span>")@OrderBy("<span class="italic"><ORDER_BY></span>") -@JoinTable(name="<span class="italic"><JOIN_TABLE_NAME></span>", joinColumns=@JoinColumn(name= - "<span class="italic"><JOIN_COLUMN_NAME></span>", referencedColumnName="<span class="italic"><JOIN_COLUMN_REFERENCED_COLUMN></span>"), - inverseJoinColumns=@JoinColumn(name="<span class="italic"><INVERSE_JOIN_COLUMN_NAME></span>", - referencedColumnName="<span class="italic"><INVERSE_JOIN_COLUMN_REFERENCED_COLUMN></span>")) - +@Id +@Column(name="<span class="italic"><COLUMN_NAME></span>", table="<span class="italic"><TABLE_NAME></span>", insertable=<span class="italic"><INSERTABLE></span>, + updatable=<span class="italic"><UPDATABLE></span>) +@Temporal(<span class="italic"><TEMPORAL></span>) +@GeneratedValue(strategy=GeneratorType.<span class="italic"><STRATEGY></span>, generator="<span class="italic"><GENERATOR_NAME></span>")@TableGenerator(name="<span class="italic"><TABLE_GENERATOR_NAME></span>", table = "<span class="italic"><TABLE_GENERATOR_TABLE></span>", + pkColumnName = "<span class="italic"><TABLE_GENERATOR_PK></span>", + valueColumnName = "<span class="italic"><TABLE_GENERATOR_VALUE_COLUMN></span>", + pkColumnValue = "<span class="italic"><TABLE_GENERATOR_PK_COLUMN_VALUE></span>")@SequenceGenerator(name="<span class="italic"><SEQUENCE_GENERATOR_NAME></span>", + sequenceName="<span class="italic"><SEQUENCE_GENERATOR_SEQUENCE></span>") </pre> <p> </p> <img src="img/ngrelt.png" alt="Related task" title="Related task" /><br /> |