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https://issues.apache.org/jira/browse/DAFFODIL-2841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17827746#comment-17827746
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Mike Beckerle commented on DAFFODIL-2841:
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See PR https://github.com/apache/daffodil/pull/1187
> Layers do not support (or poorly documented) creating SDE or
> Parse/UnparseErrors
> ---------------------------------------------------------------------------------
>
> Key: DAFFODIL-2841
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2841
> Project: Daffodil
> Issue Type: Bug
> Components: Back End
> Reporter: Steve Lawrence
> Assignee: Mike Beckerle
> Priority: Major
> Fix For: 3.7.0
>
>
> From what I can tell, there is no way for a layer signal that an error
> occurred, or at least non of our current layers seem to check and handle any
> errors, so if it can be done it needs better examples.
> If a we do something like layerRuntimeInfo.runtimeData.SDE(...), then that
> SDE exception is caught by the layer infrastructure and turned into a
> LayerExecutionException, which seems like it's used to indicate bugs in a
> layer. Throwing an SDE should not be considered a bug.
> It looks like some functions do provide ParseOrUnparseState, so maybe we
> could create a Parse/UnparseError, but it's not exactly clear or documented
> if/how this should be used, or even if the layer infrastructure checks the
> state. This needs some clarification.
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