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<title>Synchronizing classes</title>
 
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<h1>Synchronizing classes</h1>
<p>As you work with the classes in your Java project, you will need to update the <code>persistence.xml</code> file to reflect the changes. <a id="sthref43" name="sthref43"></a><a id="sthref44" name="sthref44"></a></p>
<p>Use this procedure to synchronize the <code>persistence.xml</code> file:</p>
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<p>Right-click the <code>persistence.xml</code> file in the <span class="gui-object-title">Package Explorer</span> and select <span class="gui-object-action">JPA Tools &gt; Synchronize Classes</span>.</p>
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<p class="notep1">Note:</p>
Use this function if you selected <span class="bold">Annotated classes must be listed in the persistence.xml option</span> in the <a href="ref_jpa_facet.htm#CACIFDIF">JPA Facet page</a>. In general, you do not have to use this function within the container.</td>
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<p class="titleinfigure">Synchronizing the persistence.xml File</p>
<img src="img/synchornize_classes.png" alt="This figure shows the JPA Tools &gt; Synchronize Classes option." title="This figure shows the JPA Tools &gt; Synchronize Classes option." /><br /></div>
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<p>Dali adds the necessary <code>&lt;class&gt;</code> elements to the <code>persistence.xml</code> file.</p>
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<p>Use the <span class="gui-object-title">Persistence XML Editor</span> to continue editing the <code>persistence.xml</code> file.</p>
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<a href="tasks002.htm#CIHEJAIE">Using the XML Editor to edit the persistence.xml file</a>
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<img src="img/ngrelc.png" alt="Related concept" title="Related concept" /><br />
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<a href="concepts002.htm#CHDHAGIH">The persistence.xml file</a><br />
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