[jboss-jira] [JBoss JIRA] (DROOLS-221) Initialization of KieModule failes, because of an XStream ConversionException

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved DROOLS-221.
--------------------------------

    Fix Version/s: 6.0.0.Final
       Resolution: Done

    
> Initialization of KieModule failes, because of an XStream ConversionException
> -----------------------------------------------------------------------------
>
>                 Key: DROOLS-221
>                 URL: https://issues.jboss.org/browse/DROOLS-221
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>         Environment: Using Drools components as OSGi bundles
>            Reporter: Fabian Meyer
>            Assignee: Mario Fusco
>             Fix For: 6.0.0.Final
>
>
> {code}
> com.thoughtworks.xstream.converters.ConversionException: Cannot construct org.drools.core.rule.KieModuleMetaInfo as it does not have a no-args constructor : Cannot construct org.drools.core.rule.KieModuleMetaInfo as it does not have a no-args constructor
> ---- Debugging information ----
> message             : Cannot construct org.drools.core.rule.KieModuleMetaInfo as it does not have a no-args constructor
> cause-exception     : com.thoughtworks.xstream.converters.reflection.ObjectAccessException
> cause-message       : Cannot construct org.drools.core.rule.KieModuleMetaInfo as it does not have a no-args constructor
> class               : org.drools.core.rule.KieModuleMetaInfo
> required-type       : org.drools.core.rule.KieModuleMetaInfo
> converter-type      : com.thoughtworks.xstream.converters.reflection.ReflectionConverter
> path                : /org.drools.core.rule.KieModuleMetaInfo
> version             : null
> -------------------------------
> 	at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:79)
> 	at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
> 	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
> 	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
> 	at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
> 	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
> 	at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1058)
> 	at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1042)
> 	at com.thoughtworks.xstream.XStream.fromXML(XStream.java:913)
> 	at com.thoughtworks.xstream.XStream.fromXML(XStream.java:904)
> 	at org.drools.core.rule.KieModuleMetaInfo.unmarshallMetaInfos(KieModuleMetaInfo.java:25)
> 	at org.drools.compiler.kie.builder.impl.AbstractKieModule.getTypesMetaInfo(AbstractKieModule.java:135)
> 	at org.drools.compiler.kie.builder.impl.AbstractKieModule.isTypeDeclaration(AbstractKieModule.java:126)
> 	at org.drools.compiler.kie.builder.impl.AbstractKieModule.getClassesMap(AbstractKieModule.java:117)
> 	at org.drools.compiler.kie.builder.impl.KieModuleKieProject.getClassesMap(KieModuleKieProject.java:64)
> 	at org.drools.compiler.kie.builder.impl.KieModuleKieProject.initClassLoader(KieModuleKieProject.java:51)
> 	at org.drools.compiler.kie.builder.impl.KieModuleKieProject.init(KieModuleKieProject.java:46)
> 	at org.drools.compiler.kie.builder.impl.KieContainerImpl.<init>(KieContainerImpl.java:64)
> 	at org.drools.compiler.kie.builder.impl.KieServicesImpl.newKieContainer(KieServicesImpl.java:86)
> [...]
> Caused by: com.thoughtworks.xstream.converters.reflection.ObjectAccessException: Cannot construct org.drools.core.rule.KieModuleMetaInfo as it does not have a no-args constructor
> 	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.newInstance(PureJavaReflectionProvider.java:71)
> 	at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.instantiateNewInstance(AbstractReflectionConverter.java:428)
> 	at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:233)
> 	at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
> 	... 84 more
> {code}
> After adding a default constructor the same exception occurs for org.drools.core.rule.TypeMetaInfo 
> Adding default constructors for both classes seems to fix the problem, but I don't know if there are any side effects because of uninitialized attributes.

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