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https://issues.apache.org/jira/browse/IGNITE-18106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17630368#comment-17630368
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Roman Puchkovskiy commented on IGNITE-18106:
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Thanks!
> prepareMarshal()/unmarshal() are not relayed for Collection subtypes
> --------------------------------------------------------------------
>
> Key: IGNITE-18106
> URL: https://issues.apache.org/jira/browse/IGNITE-18106
> Project: Ignite
> Issue Type: Bug
> Components: networking
> Reporter: Roman Puchkovskiy
> Assignee: Roman Puchkovskiy
> Priority: Major
> Labels: ignite-3
> Fix For: 3.0.0-beta2
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> {{@Marshallable}} fields cause prepareMarshal()/unmarshal() methods to be
> generated; also, these methods need to be called for each message containing
> a marshallable field. This means that any container that contains messages
> must relay calls to them (that is, it must contain a snippet in its
> prepareMarshal()/unmarshal() to iterate its elements and call the
> corresponding method on them). This is currently implemented for single
> message fields, for arrays and {{{}Collection{}}}, but not for subtypes of
> {{Collection}} (like lists).
> We should either support subtypes of {{Collection}} fully (and relay the
> methods calls), or not support them at all (and fail compilation if someone
> defines such a structure).
> The first (support) seems preferrable, it's easy to implement and does not
> seem to pose any dangers.
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