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https://issues.apache.org/jira/browse/CAY-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15105502#comment-15105502
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Andrus Adamchik commented on CAY-1615:
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One other possible benefit here, is that validation strategy can be plugged in
dynamically. There's some interest in e.g. having a JSR-303 filter implemented.
> Implement DataObject validation as DataChannelFilter
> ----------------------------------------------------
>
> Key: CAY-1615
> URL: https://issues.apache.org/jira/browse/CAY-1615
> Project: Cayenne
> Issue Type: Task
> Components: Core Library
> Affects Versions: 3.1M2
> Reporter: Dzmitry Kazimirchyk
> Assignee: Dzmitry Kazimirchyk
> Attachments: ValidationFilter.patch, data-context-filter-chain.patch
>
>
> Another task that takes an existing Cayenne feature and brings it to DI,
> making it easier to manage. Cayenne DataContext validates objects on commit
> by calling predefined callback methods:
> http://cayenne.apache.org/doc30/dataobject-validation.html
> We need to take the existing validation code and implement it as
> org.apache.cayenne.DataChannelFilter. Filter approach should hopefully be
> more flexible than current placement of this logic in DataContext. This will
> require some design effort - figuring out how to move this piece into a
> filter, while preserving the commit sequence; installing default filters on
> Cayenne stack startup (right now we don't have any built-in filters), etc.
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