[jira] [Assigned] (IGNITE-28736) Preserve initial order of fields in BinaryType#fieldNames()

["Nikita Amelchev (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-28736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nikita Amelchev reassigned IGNITE-28736:
----------------------------------------

    Assignee: Nikita Amelchev

> Preserve initial order of fields in BinaryType#fieldNames()
> -----------------------------------------------------------
>
>                 Key: IGNITE-28736
>                 URL: https://issues.apache.org/jira/browse/IGNITE-28736
>             Project: Ignite
>          Issue Type: Improvement
>          Components: binary
>            Reporter: Ravil Zakirov
>            Assignee: Nikita Amelchev
>            Priority: Minor
>              Labels: ise
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> h3. Description
>  
> Currently, the method `BinaryType#fieldNames()` returns a `Collection<String>` without any guarantee of field order preservation. In practice, the order of fields as defined in the original class or schema is often lost, as the underlying implementation may use unordered collections (e.g., `HashSet`).
> However, in various use cases — such as data export, schema introspection, debugging, or integration with external systems — it is important to retain the **original declaration order** of fields. This helps maintain predictability and consistency, especially when field order has semantic meaning (e.g., in CSV/JSON serialization, UI rendering, or compatibility with other binary formats).
> h3. Suggested Implementation
>  
> Ensure that during metadata registration in `BinaryTypeImpl` (or equivalent), field names are stored in a `LinkedHashSet` to preserve insertion order, and return them in that same order.



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