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<h2>
<em>HbDataStore, HbContext and Runtime Options</em>
</h2>
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<ul class="minitoc">
<li>
<a href="#HbDataStore">The HbDataStore</a>
</li>
<li>
<a href="#hbcontext">HbContext</a>
</li>
<li>
<a href="#overriding">Overriding the HbDataStore</a>
</li>
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<a href="#options">Runtime Options</a>
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<a href="#Getting+the+Hibernate+Mapping+XML">Getting the Hibernate Mapping XML</a>
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<p>This page describes the functionality of the HbDataStore and describes how different parts of the Teneo runtime
can be overridden by supplying your own specific implementation</p>
<a name="N10011"></a><a name="HbDataStore"></a>
<div class="h3">
<h3>The HbDataStore</h3>
<p>The HbDataStore object controls the persistence of a set of EPackage in a specific relational database. The HbDataStore
contains a SessionFactory and is responsible for creating and updating the database schema.</p>
<p>To create and initialize a HbDataStore, follow these steps:</p>
<ol>
<li>Create and register the HbDataStore using HbHelper.INSTANCE.createRegisterDataStore().</li>
<li>Configure the EPackages to be handled by this DataStore using HbDataStore.setEPackages().</li>
<li>Configure Hibernate properties for accessing the database. (Described
<a href="tutorialone/tutorial1_2.html#Hibernate+database+configuration"> here</a>.)</li>
<li>Call initialize() to build the Hibernate mapping and create the tables in the database.</li>
</ol>
<p>You can then obtain the Hibernate SessionFactory using HbDataStore.getSessionFactory().</p>
<p>The HbDataStore can also be used to import and export xml and xmi through the importDataStore and exportDataStore
methods.</p>
<p>The HbDataStore has a specific method to retrieve all referers to a passed EObject: getCrossReferencers.</p>
</div>
<a name="N1003A"></a><a name="hbcontext"></a>
<div class="h3">
<h3>HbContext</h3>
<p>The The HbContext returns default implementations for Accessors, class names of Tuplizers and contains a method
to create the Hibernate Configuration. HbContext is set in the HbDataStore using the setHbContext method, as a default the HbContextImpl is used.
You can extend HbContextImpl to override only specific methods.</p>
</div>
<a name="N10044"></a><a name="overriding"></a>
<div class="h3">
<h3>Overriding the HbDataStore</h3>
<p>In this release it is possible to override the HbDataStore with your own implementation. Next to the
specific implementation of the HbDataStore you also need to register a HbDataStoreFactory which creates this
specific HbDataStore, the HbDataStoreFactory is registered through the HbHelper.setHbDataStoreFactory method.
</p>
</div>
<a name="N1004E"></a><a name="options"></a>
<div class="h3">
<h3>Runtime Options</h3>
<p>Options are passed to the HbDataStore using a Properties object which is set using the HbDataStore.setPersistenceProperties method.</p>
<p>The available options are all present in the <em>org.eclipse.emf.teneo.PersistenceOptions</em> class. See the <a href="options.html">options</a>
page for a complete overview.</p>
</div>
<a name="N10062"></a><a name="Getting+the+Hibernate+Mapping+XML"></a>
<div class="h3">
<h3>Getting the Hibernate Mapping XML</h3>
<p>There are two methods to get to the hibernate mapping xml programmatically.</p>
<p>The mapping xml which has been generated by Teneo automatically (if no hibernate.hbm.xml file was specified explicitly)
can be retrieved using the method: getMappingXML on the HbDataStore.</p>
<p>The method HbHelper.INSTANCE.generateMapping(....) can be used to programmatically generate the mapping file.</p>
<p>You can save the generated mapping xml to a file and then use that file. See the persistence option to tell Teneo to
use the mapping file, <a href="options.html">here</a>.</p>
<p>The third method to get the hibernate mapping xml is by right clicking on an ecore file and select the appropriate
Teneo submenu option, see <a href="hibernate_details.html#orgeneration">here</a>. The
disadvantage of this method is that it does not allow you to pass your own menu options.</p>
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