[jira] Commented: (CAY-1213) Cayenne should support enum types in qualifier statements/expression handling

["Andrus Adamchik (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CAY-1213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12834809#action_12834809 ] 

Andrus Adamchik commented on CAY-1213:
--------------------------------------

Ksenia looked at this a bit , and it turns out that:

1. Our EJBQL implementation doesn't process enums properly.
2. In Expression API (unless we decide to add a special prefix for enums), there is a syntactic ambiguity between a relationship path and an enum. 

For now the plan is to fix #1 and keep the #2 ambiguity, resolving it when expression is processed. I.e. ASTPath can be a path or an enum.

> Cayenne should support enum types in qualifier statements/expression handling
> -----------------------------------------------------------------------------
>
>                 Key: CAY-1213
>                 URL: https://issues.apache.org/jira/browse/CAY-1213
>             Project: Cayenne
>          Issue Type: Improvement
>          Components: Core Library
>    Affects Versions: 3.0M5
>            Reporter: Robert Zeigler
>            Assignee: Robert Zeigler
>             Fix For: Undefined future
>
>
> Currently, cayenne doesn't support java enums in its expression syntax and, by extension, in qualifier statements.  This makes it impossible to use an enum type as a class descriminator for inheritance.
> Enum expressions would look like:
> propertyName = some.package.Type.CONSTANT
> to make it consistent with JPA.

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