Problem with type converters which produce a null result.
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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
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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