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Posted to issues@commons.apache.org by "Markus Spann (Jira)" <ji...@apache.org> on 2022/08/19 15:44:00 UTC
[jira] [Updated] (CSV-302) CSVFormat.duplicateHeaderMode requires default for backward compatibility
[ https://issues.apache.org/jira/browse/CSV-302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Markus Spann updated CSV-302:
-----------------------------
Description:
The member
{code:java}
boolean allowDuplicateHeaderNames{code}
was recently replaced by
{code:java}
DuplicateHeaderMode duplicateHeaderMode{code}
in class {{{}CSVFormat{}}}.
The boolean defaults to {{{}false{}}}, while the member of type {{DuplicateHeaderMode}} defaults to {{{}null{}}}.
{{duplicateHeaderMode}} must be initialized with {{DISALLOW}} for backward compatibility.
The change is also problematic with regards to serialization. The class is serializable and {{serialVersionUID}} is unchanged between versions. The boolean setting {{allowDuplicateHeaderNames}} in an object serialized in version 1.9.0 or earlier would always be deserialized to {{duplicateHeaderMode = null}} in the current head.
To handle the code changes correctly, a customized deserialization must be implemented.
was:
Customized Serialization
{code:java}
boolean allowDuplicateHeaderNames{code}
was recently replaced by
{code:java}
DuplicateHeaderMode duplicateHeaderMode{code}
in class {{{}CSVFormat{}}}.
The boolean defaults to {{{}false{}}}, while the member of type {{DuplicateHeaderMode}} defaults to {{{}null{}}}.
{{duplicateHeaderMode}} must be initialized with {{DISALLOW}} for backward compatibility.
The change is also problematic with regards to serialization. The class is serializable and {{serialVersionUID}} is unchanged between versions. The boolean setting {{allowDuplicateHeaderNames}} in an object serialized in version 1.9.0 or earlier would always be deserialized to {{duplicateHeaderMode = null}} in the current head.
To handle the code changes correctly, a customized deserialization must be implemented.
> CSVFormat.duplicateHeaderMode requires default for backward compatibility
> -------------------------------------------------------------------------
>
> Key: CSV-302
> URL: https://issues.apache.org/jira/browse/CSV-302
> Project: Commons CSV
> Issue Type: Bug
> Affects Versions: 1.10.0
> Reporter: Markus Spann
> Priority: Minor
>
> The member
> {code:java}
> boolean allowDuplicateHeaderNames{code}
> was recently replaced by
> {code:java}
> DuplicateHeaderMode duplicateHeaderMode{code}
> in class {{{}CSVFormat{}}}.
>
> The boolean defaults to {{{}false{}}}, while the member of type {{DuplicateHeaderMode}} defaults to {{{}null{}}}.
> {{duplicateHeaderMode}} must be initialized with {{DISALLOW}} for backward compatibility.
> The change is also problematic with regards to serialization. The class is serializable and {{serialVersionUID}} is unchanged between versions. The boolean setting {{allowDuplicateHeaderNames}} in an object serialized in version 1.9.0 or earlier would always be deserialized to {{duplicateHeaderMode = null}} in the current head.
> To handle the code changes correctly, a customized deserialization must be implemented.
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