[jira] [Resolved] (JDO-842) Q class specification of candidate() method

["Craig L Russell (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JDO-842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Craig L Russell resolved JDO-842.
---------------------------------
      Assignee: Craig L Russell
    Resolution: Fixed

> Q class specification of candidate() method
> -------------------------------------------
>
>                 Key: JDO-842
>                 URL: https://issues.apache.org/jira/browse/JDO-842
>             Project: JDO
>          Issue Type: Bug
>          Components: specification
>    Affects Versions: JDO 3.2.1
>            Reporter: Tilmann Zäschke
>            Assignee: Craig L Russell
>            Priority: Major
>             Fix For: JDO 3.2.2
>
>
> The specification does not clearly specify the behavior of the Q classes in Section "14.10 Typesafe Query Construction"
> The examples in section "14.11 Examples" use the following methods of generated Q-classes:
>  * candidate()
>  * candidate(String)
>  * variable(String)
> Both candidate methods are used in the query examples, but they are not specified as part of the typesafe query support.
> Specific points that we should possibly mention:
>  * These methods should allow Q classes to be used concurrently. Specifically, they should all return *new* instances. The current specification allows returning shared multiple instances which causes problems when used concurrently. (the reference implementation currently does this for 'candidate()').
>  * The reference implementation also has a 'parameter(String)' method. We may want to add this to the spec.



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