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https://issues.apache.org/jira/browse/IGNITE-28736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18101339#comment-18101339
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Ignite TC Bot commented on IGNITE-28736:
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{panel:title=Branch: [pull/13411/head] Base: [master] : No blockers
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{panel:title=Branch: [pull/13411/head] Base: [master] : New Tests
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{color:#00008b}Thin Client: Java{color} [[tests
1|https://ci2.ignite.apache.org/viewLog.html?buildId=9243067]]
* {color:#013220}ClientTestSuite: IgniteBinaryTest.testBinaryTypeFieldOrder -
PASSED{color}
{color:#00008b}Binary Objects{color} [[tests
8|https://ci2.ignite.apache.org/viewLog.html?buildId=9242983]]
* {color:#013220}IgniteBinaryObjectsTestSuite:
BinaryMarshallerSelfTest.testMetadataFieldOrderAfterSerialization[useBinaryArrays
= true] - PASSED{color}
* {color:#013220}IgniteBinaryObjectsTestSuite:
BinaryMarshallerNonCompactSelfTest.testMetadataFieldOrderAfterSerialization[useBinaryArrays
= true] - PASSED{color}
* {color:#013220}IgniteBinaryObjectsTestSuite:
BinaryMarshallerNonCompactSelfTest.testFieldOrderByBinarylizable[useBinaryArrays
= true] - PASSED{color}
* {color:#013220}IgniteBinaryObjectsTestSuite:
BinaryMarshallerNonCompactSelfTest.testMetadataFieldOrderAfterSerialization[useBinaryArrays
= false] - PASSED{color}
* {color:#013220}IgniteBinaryObjectsTestSuite:
BinaryMarshallerNonCompactSelfTest.testFieldOrderByBinarylizable[useBinaryArrays
= false] - PASSED{color}
* {color:#013220}IgniteBinaryObjectsTestSuite:
BinaryMarshallerSelfTest.testFieldOrderByBinarylizable[useBinaryArrays = true]
- PASSED{color}
* {color:#013220}IgniteBinaryObjectsTestSuite:
BinaryMarshallerSelfTest.testMetadataFieldOrderAfterSerialization[useBinaryArrays
= false] - PASSED{color}
* {color:#013220}IgniteBinaryObjectsTestSuite:
BinaryMarshallerSelfTest.testFieldOrderByBinarylizable[useBinaryArrays = false]
- PASSED{color}
{panel}
[TeamCity *--> Run :: All*
Results|https://ci2.ignite.apache.org/viewLog.html?buildId=9243124&buildTypeId=IgniteTests24Java8_RunAll]
{color:#ffffff}tcbot-analysis-comment chainBuildId=9243124
rerunBuildIds=none{color}
> 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
> Fix For: 2.19
>
> 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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