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https://issues.apache.org/jira/browse/JDO-652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12929579#action_12929579
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Matthew T. Adams commented on JDO-652:
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Andy wrote:
1. Naming convention for generated "Query" classes. Currently prefixed by "Q"
in this prototype
2. Way of obtaining candidate, parameter, variable, subquery. If the user wants
to access a field then they need to cast to the expression type. See the blog
entry for details. Ideally would like to avoid casting
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RE 1: My personal recommendation for the the "Query" classes is to append the
word Query to end of the type. Instead of QProduct, it would be ProductQuery.
RE 2: I've been following your blog entries on this development work, and I
agree on avoiding casting. Would it be possible to provide a method in the Q
class that the user can call instead of casting? Perhaps a getField() method
in the right place that returns a java.lang.reflect.Field. I'm not sure where
the right place is yet, but in that method, the cast can take place and at
least the user wouldn't have to do any casting. Thoughts?
> 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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