[jboss-jira] [JBoss JIRA] Created: (JBRULES-2727) NullPointerException due to abstract Spring beans in KnowledgeSessionDefinitionParser
NullPointerException due to abstract Spring beans in KnowledgeSessionDefinitionParser
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Key: JBRULES-2727
URL: https://jira.jboss.org/browse/JBRULES-2727
Project: Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Affects Versions: 5.1.1.FINAL
Environment: Ubuntu 10.10, Windows XP, Java 6
Reporter: Silvio Wangler
Assignee: Mark Proctor
Priority: Blocker
Fix For: 5.2.0.M1
This bug is located in the drools-spring component in class
_org.drools.container.spring.namespace.KnowledgeSessionDefinitionParser.java_
The class compares each Spring bean with a non NullPointer safe equals call.
{code}
// find any kagent's for the current kbase and assign
for ( String beanName : parserContext.getRegistry().getBeanDefinitionNames() ) {
BeanDefinition def = parserContext.getRegistry().getBeanDefinition(beanName); //
is null if the Spring bean is abstract
if ( def.getBeanClassName().equals( KnowledgeAgentBeanFactory.class.getName() ) )
{ // NullPointerException comes here due to the abstract bean that does not have a
bean definition
PropertyValue pvalue = def.getPropertyValues().getPropertyValue(
"kbase" );
RuntimeBeanReference tbf = ( RuntimeBeanReference ) pvalue.getValue();
if ( kbase.equals( tbf.getBeanName() ) ) {
factory.addPropertyValue( "knowledgeAgent", new RuntimeBeanReference(
beanName ) );
}
}
}
{code}
We use abstract beans in our Spring project and it seems that an abstract bean does not
have a _BeanDefinition_
{code}
<bean id="i18NServiceConfig" abstract="true">
<property name="xxx">
<ref local="yyy" />
</property>
</bean>
<bean class="de.corag.bpm.cone.service.i18n.I18NServiceImpl"
parent="i18NServiceConfig">
<property name="messageDao"><ref
bean="messageDao"/></property>
</bean>
{code}
if you change the equals statement like this no NullPointerException would be thrown
{code}
// find any kagent's for the current kbase and assign
for ( String beanName : parserContext.getRegistry().getBeanDefinitionNames() ) {
BeanDefinition def = parserContext.getRegistry().getBeanDefinition(beanName);
if ( KnowledgeAgentBeanFactory.class.getName().equals( def.getBeanClassName() ) )
{ // NullPointerException comes here due to the abstract bean that does not have a
bean definition
PropertyValue pvalue = def.getPropertyValues().getPropertyValue(
"kbase" );
RuntimeBeanReference tbf = ( RuntimeBeanReference ) pvalue.getValue();
if ( kbase.equals( tbf.getBeanName() ) ) {
factory.addPropertyValue( "knowledgeAgent", new RuntimeBeanReference(
beanName ) );
}
}
}
{code}
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