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| <title>2. 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 11. JPA Criteria"><link rel="prev" href="jpa_overview_criteria.html" title="Chapter 11. JPA Criteria"><link rel="next" href="ch13s03.html" title="3. 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. Executing a CriteriaQuery</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="jpa_overview_criteria.html">Prev</a> </td><th width="60%" align="center">Chapter 11. |
| 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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