[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1264) NPE at BaseObjectClassFieldExtractor.getLongValue with null fields

NPE at BaseObjectClassFieldExtractor.getLongValue with null fields ------------------------------------------------------------------ Key: JBRULES-1264 URL: http://jira.jboss.com/jira/browse/JBRULES-1264 Project: JBoss Drools Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 4.0.2 Reporter: Alexandre Gattiker Assigned To: Mark Proctor Removing one of the three rules magically solves the problem. java.lang.NullPointerException at org.drools.base.extractors.BaseObjectClassFieldExtractor.getLongValue(BaseObjectClassFieldExtractor.java:106) at org.drools.base.ClassFieldExtractor.getLongValue(ClassFieldExtractor.java:203) at org.drools.reteoo.CompositeObjectSinkAdapter$HashKey.setValue(CompositeObjectSinkAdapter.java:467) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:292) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153) at org.drools.reteoo.Rete.assertObject(Rete.java:177) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:201) at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:886) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:659) at com.sample.DroolsTest.main(DroolsTest.java:21) package com.sample; import java.io.InputStreamReader; import java.io.Reader; import org.drools.RuleBase; import org.drools.RuleBaseFactory; import org.drools.WorkingMemory; import org.drools.compiler.PackageBuilder; import org.drools.rule.Package; public class DroolsTest { public static final void main(String[] args) { try { RuleBase ruleBase = readRule(); WorkingMemory workingMemory = ruleBase.newStatefulSession(); workingMemory.insert(new Attribute()); workingMemory.insert(new Message()); workingMemory.fireAllRules(); } catch (Throwable t) { t.printStackTrace(); } } private static RuleBase readRule() throws Exception { Reader source = new InputStreamReader(DroolsTest.class.getResourceAsStream("/Sample.drl")); PackageBuilder builder = new PackageBuilder(); builder.addPackageFromDrl(source); Package pkg = builder.getPackage(); RuleBase ruleBase = RuleBaseFactory.newRuleBase(); ruleBase.addPackage(pkg); return ruleBase; } public static class Message { //empty } public static class Attribute { public Integer getValue() { return null; } } } package com.sample import com.sample.DroolsTest.Message; import com.sample.DroolsTest.Attribute; rule "rule_1" when Message() Attribute(value == 1) then System.err.println("case 1"); end rule "rule_2" when Message() Attribute(value == 2) then System.err.println("case 2"); end rule "rule_3" when Message() $a:Attribute(value == 3) then System.err.println("case 3"); end