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https://issues.apache.org/jira/browse/DAFFODIL-1324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Lawrence updated DAFFODIL-1324:
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Fix Version/s: 2.3.0
> Unparse: Sequences need way to skip over optional branches
> ----------------------------------------------------------
>
> Key: DAFFODIL-1324
> URL: https://issues.apache.org/jira/browse/DAFFODIL-1324
> Project: Daffodil
> Issue Type: Bug
> Components: Unparsing
> Reporter: Steve Lawrence
> Assignee: Dave Thompson
> Priority: Major
> Fix For: 2.3.0
>
>
> For example, if we have something like this:
> {code:xml}
> <sequence>
> <element name="optional1" minOccurs="0" maxOccurs="1" />
> <element name="optional2" minOccurs="0" maxOccurs="1" />
> </sequence>
> {code}
> The unparser generates looks something like this (not that optional elements
> are treated as arrays):
> {code:xml}
> <Sequence>
> <Array>...</Array>
> <Array>...</Array>
> </Sequence>
> {code}
> When the SequenceCombinatorUnparser gets an event it could the Start(DIArray)
> of either of the elements, since the first one is optional. I think we need
> something similar to the ChoiceMap where based on the next element received,
> it can skip over some of the parsers. This avoids having to do any
> backtracking kindof work.
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