db-jdo-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Craig L Russell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JDO-677) Ability to mark a class as read-only
Date Fri, 18 Mar 2011 16:44:29 GMT

    [ https://issues.apache.org/jira/browse/JDO-677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13008507#comment-13008507
] 

Craig L Russell commented on JDO-677:
-------------------------------------

Nothing in the specification calls for writing to the database at the time the field is changed,
so the checking probably should be done at flush/commit, even for datastore transactions.


This is different from a class that knows that it is read-only, or might be configured to
be read-only at the modeling level. In this case, mutators should throw an exception. For
an example of this kind of behavior, see java.util.Collections unmodifiableCollection method
that returns a read-only instance.


> Ability to mark a class as read-only
> ------------------------------------
>
>                 Key: JDO-677
>                 URL: https://issues.apache.org/jira/browse/JDO-677
>             Project: JDO
>          Issue Type: New Feature
>          Components: api, specification, tck
>            Reporter: Andy Jefferson
>
> While JDO already allows a datastore to be marked as read-only (javax.jdo.option.ReadOnly),
it would be desirable to extend this down to class-level. To achieve this we could add an
(boolean) attribute "read-only" at class level to metadata. The same behaviour defined in
the spec as for datastore-level would apply at class-level when a class is marked with this
attribute as "true"

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message