[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1591) Newline in eval expression causes NullPointerException

Newline in eval expression causes NullPointerException ------------------------------------------------------ Key: JBRULES-1591 URL: http://jira.jboss.com/jira/browse/JBRULES-1591 Project: JBoss Drools Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 4.0.7 Reporter: Brian Stiles Assigned To: Mark Proctor If a newline splits an eval expression, an NPE is thrown at org.drools.rule.PredicateConstraint.createContextEntry(PredicateConstraint.java:201). The following code demonstrates the problem. Removing the newline from the eval expression solves the problem. -- package sample; import java.io.StringReader; import org.drools.RuleBase; import org.drools.RuleBaseConfiguration; import org.drools.RuleBaseFactory; import org.drools.StatefulSession; import org.drools.compiler.PackageBuilder; import org.drools.compiler.PackageBuilderConfiguration; public class ExpressionProblem { public static class Tester { public boolean test(Object o1, Object o2) { return o1.equals(o2); } } public static void main(String[] args) throws Exception { final PackageBuilderConfiguration packageBuilderConfiguration = new PackageBuilderConfiguration(); final PackageBuilder packageBuilder = new PackageBuilder(packageBuilderConfiguration); packageBuilder.addPackageFromDrl(new StringReader("\n" + "package sample\n" + "\n" + "import sample.ExpressionProblem.Tester;\n" + "global sample.ExpressionProblem.Tester tester;\n" + "\n" + "rule MyRule\n" + "\n" + " when\n" + " Integer($f : this, eval(tester.test($f,\n" // OFFENDING NEWLINE + " $f)))\n" + " then \n" + " System.out.println($f);\n" + "end \n" + "")); final RuleBaseConfiguration ruleBaseConfiguration = new RuleBaseConfiguration(); final RuleBase ruleBase = RuleBaseFactory.newRuleBase(ruleBaseConfiguration); ruleBase.addPackage(packageBuilder.getPackage()); final StatefulSession session = ruleBase.newStatefulSession(false); session.setGlobal("tester", new Tester()); session.insert(1); session.fireAllRules(); } }