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https://issues.apache.org/jira/browse/ARIES-389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12904175#action_12904175
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Wolfgang Glas commented on ARIES-389:
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Hi Valentin,
That's great news, thanks for applying the patch ;-)
Do you have a rough estimation, when this thing will trickle down into a
released verion of aries?
Best regards, Wolfgang
> Problem with type converters which produce a null result.
> ---------------------------------------------------------
>
> Key: ARIES-389
> URL: https://issues.apache.org/jira/browse/ARIES-389
> Project: Aries
> Issue Type: Bug
> Components: Blueprint
> Affects Versions: 0.1, 0.2, Incubation
> Environment: apache-karaf-2.0.0, running under jre-1.6 under Windows
> or Linux.
> Reporter: Wolfgang Glas
> Assignee: Valentin Mahrwald
> Attachments: aries-blueprint-null-conversion-svn988025-r1.patch,
> aries-blueprint-null-conversion-svn988025.patch
>
>
> In order to inject ConfigAdmin properties into blueprint beans we wrote a
> ConfigPropertyAccessor class, which produces ConfigProperty beans, which then
> may be injected into other bean's properties on behalf of a special type
> converter.
> The type converter in necessary in order to correctly deal with unconfigured
> aka null values.
> You may have a look at our open source library under
> http://maven.clazzes.org/org/clazzes/util/0.9.1/
> where the classes are contained in the package org.clazzes.util.osgi.
> When applying all this stuff on null config values in any aries blueprint
> version available to me at the time of writing, the null return value of the
> type converter has the effect, that the conversion algorithm in
> AggregateConverter.java continues with it's conversion machinery for all
> known types causing it to fail with an Exception.
> However in "OSGi Service Platform Release 4, Service Compendium 4.2" in
> section 121.9.3 on pages 689-690, there is no hint ,taht the conversion
> algorithm should continue after step 2, when a type converter has been
> selected in step 1.
> I will attach a fix, which fixes my problem for svn rev. 988025 on aries
> trunk.
> Please review my patch and let me know, whether I shoukld improve it or you
> are able to apply it to the aries trunk.
> Best regards, Wolfgang Glas
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