[
http://jira.codehaus.org/browse/JIBX-165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_95995
]
Dennis Sosnoski commented on JIBX-165:
--------------------------------------
This appears to be a misunderstanding of how extends="..." works. The extends
attribute is only used on a <mapping> when you want to be choose between a set
of alternative classes, each identified by a unique element name. There should
be no problems in using multiple layers of extends, but the "leaf" <mappings>
(those which are not themselves extended) must be concrete mappings, with
element names. In this case you've got a leaf <mapping> (for AbstractChild)
which is abstract.
> "No unmarshaller defined for class at index " exception when defining / using
> abstract mappings
> -----------------------------------------------------------------------------------------------
>
> Key: JIBX-165
> URL: http://jira.codehaus.org/browse/JIBX-165
> Project: JiBX
> Issue Type: Bug
> Components: core
> Affects Versions: JiBX 1.1.3
> Environment: java 1.4.2, linux
> Reporter: alex
> Priority: Critical
>
> I have the following issue:
> Chain of inheritance -
> AbstractBase -> NonAbstractBase2 -> AbstractChild
> when defining mappings using
> {{
> <mapping abstract="true" class="AbstractBase">
> ...
> </mapping>
> <mapping name="non_abstract" class="NonAbstractBase2" extends="AbstractBase">
> ...
> </mapping>
> <mapping abstract="true" class="AbstractChild" extends="AbstractBase">
> ...
> </mapping>
> }}
> and trying to marshal and unmarshal a completely unrelated element (that
> shares only the AbstractBase), I get "No unmarshaller defined for class at
> index K" exception.
> I also tried the same with {{class="AbstractChild" extends="NonAbstractBase2"
> }} (in my experience, in these chains jibx is expecting the first base to
> appear in extends attribute value - otherwise it just fails to unmarshal -
> perhaps that's a bug as well), with same results.
> However, when I removed {{extends="AbstractBase" }}from AbstractChild, the
> error disappeared.
> This also does not prevent me from using {{ <structure
> map-as="NonAbstractBase2"/> }} in the AbstractChild mapping - and it
> marshalls and unmarshalls correctly (seems to, anyway). It is however very
> annoying and may have some other negative effects (like not being able to
> substitute an AbstractChild for NonAbstractBase2).
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