Chris Dolan created DROOLS-171: ---------------------------------- Summary: CompositeClassLoader fails on Android Key: DROOLS-171 URL: https://issues.jboss.org/browse/DROOLS-171 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 5.5.0.Final Reporter: Chris Dolan Assignee: Mark Proctor Priority: Minor (not sure if this is a bug or a feature request, because I doubt Android is supported) I'm trying to see how far I can get porting a Drools project to Android. My first roadblock is the following because the Android Dalvik classloader implementation is stricter than Java's implementation: java.lang.NullPointerException: parentLoader == null && !nullAllowed at java.lang.ClassLoader.<init>(ClassLoader.java:198) at java.lang.ClassLoader.<init>(ClassLoader.java:190) at org.drools.util.CompositeClassLoader.<init>(CompositeClassLoader.java:43) at org.drools.util.ClassLoaderUtil.getClassLoader(ClassLoaderUtil.java:27) at org.drools.RuleBaseConfiguration.setClassLoader(RuleBaseConfiguration.java:945) at org.drools.RuleBaseConfiguration.init(RuleBaseConfiguration.java:421) at org.drools.RuleBaseConfiguration.<init>(RuleBaseConfiguration.java:267) at org.drools.RuleBaseConfiguration.<clinit>(RuleBaseConfiguration.java:175) at org.drools.impl.KnowledgeBaseFactoryServiceImpl.newKnowledgeBaseConfiguration(KnowledgeBaseFactoryServiceImpl.java:37) at org.drools.KnowledgeBaseFactory.newKnowledgeBaseConfiguration(KnowledgeBaseFactory.java:125) RuleBaseConfiguration is trying to build a default configuration instance, which tries to instantiate a CompositeClassLoader. But that class calls the constructor ClassLoader(null) which is not permitted on Android. Instead, it should call the no-args ClassLoader() constructor. It's not supposed to refer to the parent classloader anyway, so it should be fine to the use the no-args version. [by the way, the CompositeClassLoader constructor should use DefaultLoader.INSTANCE instead of new DefaultLoader()] -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira