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   <title>2.&nbsp;Executing a CriteriaQuery</title><link rel="stylesheet" href="css/docbook.css" type="text/css"><base href="display"><meta name="generator" content="DocBook XSL Stylesheets V1.72.0"><link rel="start" href="manual.html" title="Apache OpenJPA 2.0 User's Guide"><link rel="up" href="jpa_overview_criteria.html" title="Chapter&nbsp;11.&nbsp; JPA Criteria"><link rel="prev" href="jpa_overview_criteria.html" title="Chapter&nbsp;11.&nbsp; JPA Criteria"><link rel="next" href="ch13s03.html" title="3.&nbsp;Extension to Criteria API"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">2.&nbsp;Executing a CriteriaQuery</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="jpa_overview_criteria.html">Prev</a>&nbsp;</td><th width="60%" align="center">Chapter&nbsp;11.&nbsp;
        JPA Criteria
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    A CriteriaQuery is executed in a similar fashion of a string-based JPQL
    query via the EntityManager and Query interfaces.
    </p><pre class="programlisting">
EntityManager em = ...
Query query = em.createQuery(qdef);
List result = query.getResultList();    
    </pre><p>
    </p><p>
    A query definition can use named parameters, and the parameter values are
    set as usual in the Query instance. 
    </p><p>
    The JPA 2.0 Specification on Criteria API can be found at 
    <a xmlns:xlink="http://www.w3.org/1999/xlink" href="http://jcp.org/aboutJava/communityprocess/pr/jsr317/index.html" target="_top">
    public draft</a>.
    </p><p>
    
    <a xmlns:xlink="http://www.w3.org/1999/xlink" href="http://www.ibm.com/developerworks/java/library/j-typesafejpa/" target="_top">A developerworks article</a>
    explains details and further usage of Criteria API and its OpenJPA extensions.  
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        JPA Criteria
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