Re: [rules-dev] Drools on android -reply

On 2 January 2012 14:30, Matthew Versaggi <profversaggi(a)gmail.com&gt; wrote: > Here's what I got working and when it failed .... it was just the basic > 'hello world' kind of stuff: > > Worked: > final KnowledgeBuilder kbuilder = > KnowledgeBuilderFactory.newKnowledgeBuilder(); > > Died: > // this will parse and compile in one step > kbuilder.add(ResourceFactory.newClassPathResource("HelloWorld.drl", > DroolsTest.class), ResourceType.DRL); > > LogCat: > 01-02 13:13:17.684: E/AndroidRuntime(537): java.lang.RuntimeException: > Unable to start activity > ComponentInfo{com.versaggi.android.droolsandroidtest/com.versaggi.android.droolsandroidtest.DroolsAndroidTestActivity}: > java.lang.NullPointerException > > I've seen NPEs thrown up from down in the Drools gears when the DRL resource could not be found. Make sure that ResourceFactory.newClassPathResource("HelloWorld.drl", DroolsTest.class) is != null. I had to re-compile the CompositeClassLoader.java file and then reinsert > it into the drools-api-5.1.0.M2.jar file to get past this issue: > > "A small modification is needed in org.drools.util.CompositeClassLoader. > Apparently, the Android JVM doesn't allow null as the parent classloader > so I changed that to super(CompositeClassLoader.class.getClassLoader())in the constructor, and that works fine." > Yes, that's come up in other Java environments as well, and IIRC been fixed on the way towards 5.2.0. )There ought to be a closed JIRA, if s.o. cares to look it up.) -W _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev