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| <div class="sect3"><!-- infolevel="all" infotype="General" --> |
| <h1>Inheritance information</h1> |
| <p><a id="sthref196" name="sthref196"></a><a id="sthref197" name="sthref197"></a>This table lists the fields available on the <span class="gui-object-title">Inheritance</span> area in the <span class="gui-object-title">Java Details</span> view for each entity type.</p> |
| <div class="inftblruleinformal"> |
| <table class="RuleInformal" title="This table describes the options on the Persistence Properties view, Inheritance tab." summary="This table describes the options on the Persistence Properties view, Inheritance 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-t6">Property</th> |
| <th align="left" valign="bottom" id="r1c2-t6">Description</th> |
| <th align="left" valign="bottom" id="r1c3-t6">Default</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr align="left" valign="top"> |
| <td align="left" id="r2c1-t6" headers="r1c1-t6">Strategy</td> |
| <td align="left" headers="r2c1-t6 r1c2-t6">Specify the strategy to use when mapping a class or class hierarchy: |
| <ul> |
| <li> |
| <p>Single table – All classes in the hierarchy are mapped to a single table.</p> |
| </li> |
| <li> |
| <p>Joined – The root of the hierarchy is mapped to a single table; each child maps to its own table.</p> |
| </li> |
| <li> |
| <p>Table per class – Each class is mapped to a separate table.</p> |
| </li> |
| </ul> |
| </td> |
| <td align="left" headers="r2c1-t6 r1c3-t6">Single table</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t6" headers="r1c1-t6">Discriminator Column</td> |
| <td align="left" headers="r3c1-t6 r1c2-t6">Use to specify the name of the discriminator column when using a <span class="bold">Single</span> or <span class="bold">Joined</span> inheritance strategy.</td> |
| <td align="left" headers="r3c1-t6 r1c3-t6"><br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r4c1-t6" headers="r1c1-t6">Discriminator Type</td> |
| <td align="left" headers="r4c1-t6 r1c2-t6">Set this field to set the discriminator type to <code>Char</code> or <code>Integer</code> (instead of its default: <code>String</code>). The <span class="bold">Discriminator Value</span> must conform to this type.</td> |
| <td align="left" headers="r4c1-t6 r1c3-t6">String</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r5c1-t6" headers="r1c1-t6">Discriminator Value</td> |
| <td align="left" headers="r5c1-t6 r1c2-t6">Specify the discriminator value used to differentiate an entity in this inheritance hierarchy. The value must conform to the specified <span class="bold">Discriminator Type</span>.</td> |
| <td align="left" headers="r5c1-t6 r1c3-t6"><br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r6c1-t6" headers="r1c1-t6">Primary Key Join Columns</td> |
| <td align="left" headers="r6c1-t6 r1c2-t6">Use to override the default primary key join columns. Select <span class="bold">Override Default</span>, then click <span class="bold">Add</span> to select new Join Column. |
| <p>This field corresponds with @PrimaryKeyJoinColumn annotation.</p> |
| </td> |
| <td align="left" headers="r6c1-t6 r1c3-t6"><br /></td> |
| </tr> |
| </tbody> |
| </table> |
| <br /></div> |
| <!-- class="inftblruleinformal" --> |
| <p> </p> |
| <img src="img/ngrelt.png" alt="Related task" title="Related task" /><br /> |
| <br /> |
| <a href="task_inheritance.htm#CIHCCCJD">Specifying entity inheritance</a><br /> |
| <a href="task_add_persistence.htm#BABHICAI">Adding persistence to a class</a> |
| <p> </p> |
| <img src="img/ngrelr.png" alt="Related reference" title="Related reference" /><br /> |
| <br /> |
| <a href="ref_persistence_prop_view.htm#BABFAEBB">JPA Details view (for entities)</a></div> |
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