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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SIS-125) ModifiableMetadata.nonNullCollection(...) should determine more accuratly if the metadata object is being marshalled
Date Fri, 09 Oct 2015 09:19:26 GMT

     [ https://issues.apache.org/jira/browse/SIS-125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Martin Desruisseaux updated SIS-125:
------------------------------------
    Affects Version/s: 0.4
                       0.5
                       0.6

> ModifiableMetadata.nonNullCollection(...) should determine more accuratly if the metadata
object is being marshalled
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: SIS-125
>                 URL: https://issues.apache.org/jira/browse/SIS-125
>             Project: Spatial Information Systems
>          Issue Type: Improvement
>          Components: Metadata
>    Affects Versions: 0.3, 0.4, 0.5, 0.6
>            Reporter: Martin Desruisseaux
>            Priority: Minor
>
> Despite its name, the {{ModifiableMetadata.nonNullCollection(...)}} method may return
{{null}} in the special case of XML marshalling if and only if the marshalled element is optional.
This is a hack for preventing JAXB to create empty nodes for empty properties. However in
current implementation, the decision to return null or not is set by a thread-local flag,
which apply {{ModifiableMetadata}} being marshalled in that particular thread. It does not
work well when the user provides its own metadata implementation which create a Geotk metadata
object on the fly.
> We need to make the {{ModifiableMetadata.canReturnNull()}} method more accurate in order
to not only use a thread-local flag, but also check for the particular metadata instance being
marshalled.



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