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https://issues.apache.org/jira/browse/OODT-551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13555535#comment-13555535
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Luca Cinquini commented on OODT-551:
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Well, good discussion... By looking at the API of the Metadata object, the
access methods return List<String>, which are ordered... you could argue that
this is to allow returning identical entries, or to preserve the original
order... I think the FileManager implementations that I have worked with do
preserve the order of the metadata values.
And yes, for the VFASTR project it is critical that the values be retrieved in
the same order that they are inserted...
> DataSourceCatalog implementation does not preserve order of metadata values
> ---------------------------------------------------------------------------
>
> Key: OODT-551
> URL: https://issues.apache.org/jira/browse/OODT-551
> Project: OODT
> Issue Type: Bug
> Components: file manager
> Affects Versions: 0.5
> Reporter: Luca Cinquini
> Assignee: Luca Cinquini
> Fix For: 0.6
>
>
> The table that stores the metadata (key, value) pairs for the File Manager
> database-based implementation has no primary key - as a consequence, values
> are not guaranteed to be returned in any order, which is a problem for
> applications that rely on the order of the values (for example, among
> different metadata keys).
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