[jboss-jira] [JBoss JIRA] Assigned: (JBRULES-1050) Extra space between variable and field name in LHS causes crash

Extra space between variable and field name in LHS causes crash --------------------------------------------------------------- Key: JBRULES-1050 URL: http://jira.jboss.com/jira/browse/JBRULES-1050 Project: JBoss Rules Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 4.0.0.GA Reporter: Alexandre Gattiker Assigned To: Edson Tirelli Writing a condition as "$co:Item(attachment in ($c, $c. parent))" fails at runtime with an uninformative exception. Removing the extra space and writing "$c.parent" corrects the problem. Below is the rule file, sample code and exception trace. package com.sample import com.sample.DroolsTest.Child; import com.sample.DroolsTest.Parent; import com.sample.DroolsTest.Item; rule "My Rule" when $c:Child() $co:Item(attachment in ($c, $c. parent)) then System.out.println("wawa"); end package com.sample; import java.io.InputStreamReader; import java.io.Reader; import org.drools.RuleBase; import org.drools.RuleBaseFactory; import org.drools.WorkingMemory; import org.drools.compiler.PackageBuilder; import org.drools.event.DebugWorkingMemoryEventListener; import org.drools.rule.Package; /** * This is a sample file to launch a rule package from a rule source file. */ public class DroolsTest { public static final void main(String[] args) { try { RuleBase ruleBase = readRule(); } catch (Throwable t) { t.printStackTrace(); } } private static RuleBase readRule() throws Exception { Reader source = new InputStreamReader(DroolsTest.class .getResourceAsStream("/Sample.drl")); PackageBuilder builder = new PackageBuilder(); builder.addPackageFromDrl(source); Package pkg = builder.getPackage(); RuleBase ruleBase = RuleBaseFactory.newRuleBase(); ruleBase.addPackage(pkg); return ruleBase; } public static class Parent { } public static class Child { private Parent parent; public Parent getParent() { return parent; } } public static class Item { private Object attachment; public Object getAttachment() { return attachment; } } } java.lang.NullPointerException at org.drools.reteoo.builder.PatternBuilder.createConstraints(PatternBuilder.java:128) at org.drools.reteoo.builder.PatternBuilder.attachPattern(PatternBuilder.java:72) at org.drools.reteoo.builder.PatternBuilder.build(PatternBuilder.java:54) at org.drools.reteoo.builder.GroupElementBuilder$AndBuilder.build(GroupElementBuilder.java:112) at org.drools.reteoo.builder.GroupElementBuilder.build(GroupElementBuilder.java:70) at org.drools.reteoo.builder.ReteooRuleBuilder.addSubRule(ReteooRuleBuilder.java:136) at org.drools.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.java:109) at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:116) at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:262) at org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:333) at com.sample.DroolsTest.readRule(DroolsTest.java:33) at com.sample.DroolsTest.main(DroolsTest.java:20)