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From "Ralph Goers (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (CONFIGURATION-365) Bean handling not allowing an XPathExpressionEngine
Date Wed, 22 Apr 2009 00:19:47 GMT

     [ https://issues.apache.org/jira/browse/CONFIGURATION-365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ralph Goers resolved CONFIGURATION-365.
---------------------------------------

    Resolution: Cannot Reproduce

Please provide more information on how to reproduce this problem. As noted, there are unit
tests that test this exact scenario that pass.

> Bean handling not allowing an XPathExpressionEngine
> ---------------------------------------------------
>
>                 Key: CONFIGURATION-365
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-365
>             Project: Commons Configuration
>          Issue Type: Bug
>         Environment: OSGi / Felix
>            Reporter: Rob Walker
>
> Trying to set an XPathExpressionEngine in the config file:
> ===
>   <xml  
>     config-name="config.product.xml" 
>     fileName="${sys:bundle.root}/etc/${sys:launch.target}.properties.xml" 
>     >
>         <expressionEngine config-class="org.apache.commons.configuration.tree.xpath.XPathExpressionEngine"/>
>   </xml>
> ===
> And it throws an exception:
> ====
> Caused by: org.apache.commons.configuration.ConfigurationException: org.apache.commons.configuration.ConfigurationRuntimeException:
> java.lang.IllegalArgumentException: Cannot invoke org.apache.commons.configuration.HierarchicalConfiguration.setExpressionEngine
on
> bean class 'class org.apache.commons.configuration.XMLConfiguration' - argument type
mismatch - had objects of type "org.apache.comm
> ons.configuration.tree.xpath.XPathExpressionEngine" but expected signature "org.apache.commons.configuration.tree.ExpressionEngine"
>         at org.apache.commons.configuration.DefaultConfigurationBuilder.createConfigurationAt(DefaultConfigurationBuilder.java:752)
>         at org.apache.commons.configuration.DefaultConfigurationBuilder.initCombinedConfiguration(DefaultConfigurationBuilder.java:6
> 28)
>         at org.apache.commons.configuration.DefaultConfigurationBuilder.getConfiguration(DefaultConfigurationBuilder.java:560)
>         at com.ascert.vt.modules.propsmgr.PropsMgrMainOSGI.<init>(PropsMgrMainOSGI.java:102)
>         ... 13 more
> Caused by: org.apache.commons.configuration.ConfigurationRuntimeException: java.lang.IllegalArgumentException:
Cannot invoke org.apa
> che.commons.configuration.HierarchicalConfiguration.setExpressionEngine on bean class
'class org.apache.commons.configuration.XMLCon
> figuration' - argument type mismatch - had objects of type "org.apache.commons.configuration.tree.xpath.XPathExpressionEngine"
but e
> xpected signature "org.apache.commons.configuration.tree.ExpressionEngine"
>         at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:252)
>         at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:269)
>         at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:283)
>         at org.apache.commons.configuration.DefaultConfigurationBuilder.createConfigurationAt(DefaultConfigurationBuilder.java:747)
>         ... 16 more
> Caused by: java.lang.IllegalArgumentException: Cannot invoke org.apache.commons.configuration.HierarchicalConfiguration.setExpressio
> nEngine on bean class 'class org.apache.commons.configuration.XMLConfiguration' - argument
type mismatch - had objects of type "org.
> apache.commons.configuration.tree.xpath.XPathExpressionEngine" but expected signature
"org.apache.commons.configuration.tree.Express
> ionEngine"
> ===
> Since XPathExpressionEngine implements ExpressionEngine, this looks like a reflection
bug to me i.e. not finding a method with a signature for implemented interfaces as opposed
to just subclasses.
> Not sure if this is OSGi / Felix classloading related, but don't think so

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