Apache OJB

<h2 id="features">Features</h2>
<p>OJB is  an <i><a href="/facts/Open-source_software/HzTaB8E9">open source</a></i> project. It is lightweight and easy to use, requiring simply configure two files to implement a persistence layer. It is easy to integrate into an existing application because it does not generate code.
It allows the use of different patterns of persistence: owner (PersistenceBroker <a href="/facts/API/GMlN4vUr">API</a>), <a href="/facts/Java_Data_Objects/3wQjEByL">JDO</a> and Object Data Management Group  (<a href="/facts/ODMG/3DGvyppC">ODMG</a>).
</p>
<h2 id="functionality">Functionality</h2>
<p>OJB uses an <a href="/facts/XML/clNgUfWk">XML</a> based Object/Relational mapping. The mapping resides in a dynamic <a href="/facts/Metadata/qt35z79C">MetaData</a> layer, which can be manipulated at runtime through a simple <a href="/facts/Metaobject/UgJq5A0t">Meta-Object-Protocol</a> (MOP) to change the behaviour of the <a href="/facts/Persistence_(computer_science)/frF0o2q2">persistence</a> kernel.
</p>
<h2 id="configuration">Configuration</h2>
<p>At least two files are required to configure OJB:  OJB.properties and repository.xml
</p>
<h2 id="allocation">Allocation</h2>
<p>For mapping a 1-1 relationship, for example, you have two tables: person and account. In this case, a person has an account and vice versa.
</p>
<h2 id="see-also">See also</h2>
<ul>
<li>Free and open-source software portal</li></ul>
<ul><li><a href="/facts/Apache_OpenJPA/Qb8CKm6H">Apache OpenJPA</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="https://db.apache.org/ojb/">Apache ObJectRelationalBridge</a> <a href="https://web.archive.org/web/20060126230948/http://db.apache.org/ojb/">Archived</a> 2006-01-26 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"- Linux Today - Internetnews.com: Apache releases Object Relational Bridge". Archived from the original on 2012-09-02. Retrieved 2011-05-07. <a href="https://web.archive.org/web/20120902041816/http://www.linuxtoday.com/developer/2005040602826NWSVDV" target="_blank">https://web.archive.org/web/20120902041816/http://www.linuxtoday.com/developer/2005040602826NWSVDV</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Apache ObJectRelationalBridge (OJB), Apache Software Foundation. <a href="https://attic.apache.org/projects/ojb.html" target="_blank">https://attic.apache.org/projects/ojb.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
</ol>

Apache OJB open-in-new

Apache OJB