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https://issues.apache.org/jira/browse/JDO-652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12927451#action_12927451
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Andy Jefferson commented on JDO-652:
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Some examples of what you can do with DataNucleus prototype API
http://datanucleus.blogspot.com/2010/11/jdo-typesafe-queries-part-3-examples.html

> Provision of a typesafe refactor-friendly query capability for JDOQL
> --------------------------------------------------------------------
>
>                 Key: JDO-652
>                 URL: https://issues.apache.org/jira/browse/JDO-652
>             Project: JDO
>          Issue Type: New Feature
>          Components: api, specification, tck
>            Reporter: Andy Jefferson
>             Fix For: JDO 3 maintenance release 1
>
>
> There are various querying capabilities of this type around. JPA2 has its 
> Criteria query API. Third party solutions like QueryDSL also exist, in its 
> case providing a JDOQL implementation (as well as JPQL, and HQL). We should 
> seriously consider introducing something along these lines in the JDO2.4 
> timeframe. 
> There is a comparison of JPA Criteria with QueryDSL over at 
> http://source.mysema.com/forum/mvnforum/viewthread_thread,49

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